/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-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:32:13,140 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:32:13,218 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 16:32:13,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:32:13,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:32:13,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:32:13,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:32:13,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:32:13,258 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:32:13,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:32:13,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:32:13,263 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:32:13,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:32:13,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:32:13,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:32:13,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:32:13,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:32:13,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:32:13,265 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:32:13,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:32:13,265 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:32:13,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:32:13,266 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:32:13,266 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:32:13,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:32:13,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:32:13,267 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:32:13,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:32:13,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:32:13,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:32:13,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:32:13,268 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:32:13,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:32:13,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:32:13,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:32:13,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:32:13,538 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:32:13,538 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:32:13,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-11-17 16:32:14,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:32:14,871 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:32:14,872 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-11-17 16:32:14,877 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ec2b097/1a6f17809f5e45e8962045fca5de8636/FLAG3597def33 [2023-11-17 16:32:14,888 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ec2b097/1a6f17809f5e45e8962045fca5de8636 [2023-11-17 16:32:14,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:32:14,891 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:32:14,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:32:14,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:32:14,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:32:14,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:32:14" (1/1) ... [2023-11-17 16:32:14,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604367cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:14, skipping insertion in model container [2023-11-17 16:32:14,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:32:14" (1/1) ... [2023-11-17 16:32:14,917 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:32:15,044 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-simple-queue.wvr.c[2464,2477] [2023-11-17 16:32:15,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:32:15,065 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:32:15,082 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-simple-queue.wvr.c[2464,2477] [2023-11-17 16:32:15,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:32:15,093 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:32:15,093 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:32:15,098 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:32:15,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15 WrapperNode [2023-11-17 16:32:15,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:32:15,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:32:15,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:32:15,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:32:15,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,124 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,156 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 135 [2023-11-17 16:32:15,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:32:15,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:32:15,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:32:15,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:32:15,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,191 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:32:15,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:32:15,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:32:15,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:32:15,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (1/1) ... [2023-11-17 16:32:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:32:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:15,242 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 16:32:15,273 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 16:32:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:32:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:32:15,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:32:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:32:15,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:32:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:32:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:32:15,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:32:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:32:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:32:15,281 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 16:32:15,397 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:32:15,399 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:32:15,673 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:32:15,776 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:32:15,776 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:32:15,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:32:15 BoogieIcfgContainer [2023-11-17 16:32:15,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:32:15,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:32:15,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:32:15,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:32:15,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:32:14" (1/3) ... [2023-11-17 16:32:15,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de33e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:32:15, skipping insertion in model container [2023-11-17 16:32:15,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:32:15" (2/3) ... [2023-11-17 16:32:15,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de33e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:32:15, skipping insertion in model container [2023-11-17 16:32:15,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:32:15" (3/3) ... [2023-11-17 16:32:15,785 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-11-17 16:32:15,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:32:15,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:32:15,800 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:32:15,878 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:32:15,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 262 flow [2023-11-17 16:32:15,991 INFO L124 PetriNetUnfolderBase]: 9/122 cut-off events. [2023-11-17 16:32:15,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:32:15,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 122 events. 9/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-17 16:32:15,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 124 transitions, 262 flow [2023-11-17 16:32:16,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 113 transitions, 238 flow [2023-11-17 16:32:16,009 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:32:16,026 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 113 transitions, 238 flow [2023-11-17 16:32:16,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 113 transitions, 238 flow [2023-11-17 16:32:16,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 113 transitions, 238 flow [2023-11-17 16:32:16,061 INFO L124 PetriNetUnfolderBase]: 9/113 cut-off events. [2023-11-17 16:32:16,061 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:32:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-17 16:32:16,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-11-17 16:32:19,575 INFO L134 LiptonReduction]: Checked pairs total: 507 [2023-11-17 16:32:19,576 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-17 16:32:19,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:32:19,593 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;@59f33663, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:32:19,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:32:19,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:32:19,598 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:32:19,598 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:32:19,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:19,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:19,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:19,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1190107901, now seen corresponding path program 1 times [2023-11-17 16:32:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856181617] [2023-11-17 16:32:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:19,892 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 16:32:19,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:19,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856181617] [2023-11-17 16:32:19,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856181617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:32:19,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:32:19,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:32:19,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251281997] [2023-11-17 16:32:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:32:19,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:32:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:32:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:32:19,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 240 [2023-11-17 16:32:19,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 16:32:19,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:19,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 240 [2023-11-17 16:32:19,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:19,979 INFO L124 PetriNetUnfolderBase]: 60/105 cut-off events. [2023-11-17 16:32:19,979 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-17 16:32:19,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 105 events. 60/105 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 14 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 167. Up to 53 conditions per place. [2023-11-17 16:32:19,981 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 19 selfloop transitions, 2 changer transitions 2/25 dead transitions. [2023-11-17 16:32:19,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 114 flow [2023-11-17 16:32:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:32:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:32:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-11-17 16:32:19,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-17 16:32:19,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-11-17 16:32:19,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-11-17 16:32:19,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:19,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-11-17 16:32:20,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 16:32:20,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 16:32:20,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 16:32:20,007 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 348 transitions. [2023-11-17 16:32:20,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 114 flow [2023-11-17 16:32:20,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:32:20,011 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 16:32:20,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-17 16:32:20,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:32:20,016 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 16:32:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 16:32:20,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:20,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:32:20,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:20,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1194407259, now seen corresponding path program 1 times [2023-11-17 16:32:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379769502] [2023-11-17 16:32:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:20,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:20,112 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 16:32:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379769502] [2023-11-17 16:32:20,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379769502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:32:20,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:32:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:32:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264550895] [2023-11-17 16:32:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:32:20,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:32:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:32:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:32:20,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-17 16:32:20,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 16:32:20,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:20,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-17 16:32:20,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:20,180 INFO L124 PetriNetUnfolderBase]: 52/105 cut-off events. [2023-11-17 16:32:20,181 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 16:32:20,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 105 events. 52/105 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 310 event pairs, 17 based on Foata normal form. 6/93 useless extension candidates. Maximal degree in co-relation 138. Up to 74 conditions per place. [2023-11-17 16:32:20,182 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 18 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-11-17 16:32:20,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 121 flow [2023-11-17 16:32:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:32:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:32:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-11-17 16:32:20,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2023-11-17 16:32:20,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-11-17 16:32:20,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-11-17 16:32:20,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:20,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-11-17 16:32:20,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 16:32:20,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 16:32:20,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 16:32:20,190 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 346 transitions. [2023-11-17 16:32:20,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 121 flow [2023-11-17 16:32:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:32:20,191 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-17 16:32:20,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-17 16:32:20,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-17 16:32:20,192 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-17 16:32:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 16:32:20,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:20,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:32:20,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:20,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1167396026, now seen corresponding path program 1 times [2023-11-17 16:32:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62208761] [2023-11-17 16:32:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:20,386 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 16:32:20,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:20,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62208761] [2023-11-17 16:32:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62208761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:32:20,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:32:20,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:32:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735159053] [2023-11-17 16:32:20,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:32:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:32:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:32:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:32:20,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 240 [2023-11-17 16:32:20,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 16:32:20,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:20,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 240 [2023-11-17 16:32:20,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:20,467 INFO L124 PetriNetUnfolderBase]: 61/138 cut-off events. [2023-11-17 16:32:20,467 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-17 16:32:20,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 138 events. 61/138 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 512 event pairs, 44 based on Foata normal form. 5/140 useless extension candidates. Maximal degree in co-relation 220. Up to 103 conditions per place. [2023-11-17 16:32:20,469 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 16 selfloop transitions, 2 changer transitions 10/30 dead transitions. [2023-11-17 16:32:20,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 142 flow [2023-11-17 16:32:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:32:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:32:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-11-17 16:32:20,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239583333333333 [2023-11-17 16:32:20,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-11-17 16:32:20,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-11-17 16:32:20,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:20,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-11-17 16:32:20,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:20,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 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 16:32:20,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 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 16:32:20,479 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 407 transitions. [2023-11-17 16:32:20,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 142 flow [2023-11-17 16:32:20,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:32:20,481 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-17 16:32:20,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-17 16:32:20,483 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:32:20,483 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-17 16:32:20,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 16:32:20,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:20,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:20,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:32:20,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:20,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -149665073, now seen corresponding path program 1 times [2023-11-17 16:32:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:20,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310105233] [2023-11-17 16:32:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:20,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310105233] [2023-11-17 16:32:20,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310105233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:20,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373794714] [2023-11-17 16:32:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:20,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:20,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:20,991 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 16:32:21,023 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 16:32:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:21,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:32:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:21,205 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 23 treesize of output 1 [2023-11-17 16:32:21,243 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 16:32:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:21,328 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 20 treesize of output 15 [2023-11-17 16:32:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:21,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:21,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:21,692 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 57 treesize of output 45 [2023-11-17 16:32:21,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:21,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-11-17 16:32:21,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:21,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-11-17 16:32:21,726 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 28 treesize of output 16 [2023-11-17 16:32:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:21,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373794714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:21,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:21,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-17 16:32:21,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035631482] [2023-11-17 16:32:21,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:21,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:32:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:32:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:32:21,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 240 [2023-11-17 16:32:21,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 18 states, 18 states have (on average 71.83333333333333) internal successors, (1293), 18 states have internal predecessors, (1293), 0 states have call successors, (0), 0 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 16:32:21,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:21,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 240 [2023-11-17 16:32:21,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:22,195 INFO L124 PetriNetUnfolderBase]: 119/240 cut-off events. [2023-11-17 16:32:22,196 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-17 16:32:22,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 240 events. 119/240 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 954 event pairs, 36 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 573. Up to 66 conditions per place. [2023-11-17 16:32:22,198 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 20 selfloop transitions, 4 changer transitions 32/58 dead transitions. [2023-11-17 16:32:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 293 flow [2023-11-17 16:32:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:32:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:32:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 616 transitions. [2023-11-17 16:32:22,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32083333333333336 [2023-11-17 16:32:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 616 transitions. [2023-11-17 16:32:22,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 616 transitions. [2023-11-17 16:32:22,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 616 transitions. [2023-11-17 16:32:22,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 77.0) internal successors, (616), 8 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 16:32:22,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 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 16:32:22,207 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 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 16:32:22,207 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 8 states and 616 transitions. [2023-11-17 16:32:22,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 293 flow [2023-11-17 16:32:22,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 58 transitions, 285 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:32:22,209 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 94 flow [2023-11-17 16:32:22,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-11-17 16:32:22,210 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-17 16:32:22,210 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 94 flow [2023-11-17 16:32:22,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.83333333333333) internal successors, (1293), 18 states have internal predecessors, (1293), 0 states have call successors, (0), 0 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 16:32:22,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:22,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:22,221 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 16:32:22,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:22,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:22,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1916279900, now seen corresponding path program 2 times [2023-11-17 16:32:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070221839] [2023-11-17 16:32:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070221839] [2023-11-17 16:32:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070221839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930676133] [2023-11-17 16:32:23,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:32:23,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:23,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:23,283 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 16:32:23,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:32:23,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:23,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:32:23,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:23,467 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 20 treesize of output 15 [2023-11-17 16:32:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:32:23,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:23,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:23,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-17 16:32:23,560 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 9 treesize of output 3 [2023-11-17 16:32:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930676133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:23,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:23,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 15 [2023-11-17 16:32:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096673456] [2023-11-17 16:32:23,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:23,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:32:23,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:32:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2023-11-17 16:32:23,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:32:23,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 94 flow. Second operand has 17 states, 17 states have (on average 75.05882352941177) internal successors, (1276), 17 states have internal predecessors, (1276), 0 states have call successors, (0), 0 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 16:32:23,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:23,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:32:23,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:23,954 INFO L124 PetriNetUnfolderBase]: 103/210 cut-off events. [2023-11-17 16:32:23,955 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-17 16:32:23,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 210 events. 103/210 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 794 event pairs, 18 based on Foata normal form. 1/207 useless extension candidates. Maximal degree in co-relation 482. Up to 45 conditions per place. [2023-11-17 16:32:23,956 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 37 selfloop transitions, 11 changer transitions 16/66 dead transitions. [2023-11-17 16:32:23,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 360 flow [2023-11-17 16:32:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:32:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:32:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 868 transitions. [2023-11-17 16:32:23,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3287878787878788 [2023-11-17 16:32:23,960 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 868 transitions. [2023-11-17 16:32:23,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 868 transitions. [2023-11-17 16:32:23,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:23,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 868 transitions. [2023-11-17 16:32:23,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.9090909090909) internal successors, (868), 11 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:32:23,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 16:32:23,965 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 16:32:23,966 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 94 flow. Second operand 11 states and 868 transitions. [2023-11-17 16:32:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 360 flow [2023-11-17 16:32:23,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 66 transitions, 328 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 16:32:23,969 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 134 flow [2023-11-17 16:32:23,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=134, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-11-17 16:32:23,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-17 16:32:23,969 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 134 flow [2023-11-17 16:32:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.05882352941177) internal successors, (1276), 17 states have internal predecessors, (1276), 0 states have call successors, (0), 0 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 16:32:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:23,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:23,977 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 16:32:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:24,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -156566194, now seen corresponding path program 3 times [2023-11-17 16:32:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065863177] [2023-11-17 16:32:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065863177] [2023-11-17 16:32:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065863177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24859951] [2023-11-17 16:32:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:32:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:24,269 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 16:32:24,277 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 16:32:24,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:32:24,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:24,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:32:24,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:24,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:24,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24859951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:24,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-17 16:32:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379109474] [2023-11-17 16:32:24,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:32:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:32:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:32:24,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-17 16:32:24,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 111.625) internal successors, (893), 8 states have internal predecessors, (893), 0 states have call successors, (0), 0 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 16:32:24,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:24,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-17 16:32:24,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:24,559 INFO L124 PetriNetUnfolderBase]: 195/390 cut-off events. [2023-11-17 16:32:24,559 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2023-11-17 16:32:24,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 390 events. 195/390 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1722 event pairs, 50 based on Foata normal form. 12/397 useless extension candidates. Maximal degree in co-relation 702. Up to 154 conditions per place. [2023-11-17 16:32:24,563 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 39 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2023-11-17 16:32:24,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 319 flow [2023-11-17 16:32:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:32:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:32:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-11-17 16:32:24,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2023-11-17 16:32:24,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-11-17 16:32:24,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-11-17 16:32:24,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:24,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-11-17 16:32:24,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:24,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 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 16:32:24,568 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 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 16:32:24,568 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 134 flow. Second operand 4 states and 465 transitions. [2023-11-17 16:32:24,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 319 flow [2023-11-17 16:32:24,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 290 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-17 16:32:24,578 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 192 flow [2023-11-17 16:32:24,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-17 16:32:24,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-17 16:32:24,580 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 192 flow [2023-11-17 16:32:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.625) internal successors, (893), 8 states have internal predecessors, (893), 0 states have call successors, (0), 0 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 16:32:24,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:24,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:24,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:24,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:24,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2011022341, now seen corresponding path program 4 times [2023-11-17 16:32:24,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:24,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107480051] [2023-11-17 16:32:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:24,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107480051] [2023-11-17 16:32:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107480051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022689382] [2023-11-17 16:32:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:32:25,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:25,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:25,230 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 16:32:25,234 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 16:32:25,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:32:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:25,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:32:25,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:25,523 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:25,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:32:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:25,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:25,564 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:25,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 16:32:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:25,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022689382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:25,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:25,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-17 16:32:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050579969] [2023-11-17 16:32:25,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:32:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:32:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:32:25,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:25,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 192 flow. Second operand has 24 states, 24 states have (on average 79.75) internal successors, (1914), 24 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 16:32:25,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:25,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:25,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:26,779 INFO L124 PetriNetUnfolderBase]: 448/901 cut-off events. [2023-11-17 16:32:26,779 INFO L125 PetriNetUnfolderBase]: For 1037/1037 co-relation queries the response was YES. [2023-11-17 16:32:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2646 conditions, 901 events. 448/901 cut-off events. For 1037/1037 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5198 event pairs, 46 based on Foata normal form. 40/939 useless extension candidates. Maximal degree in co-relation 1606. Up to 186 conditions per place. [2023-11-17 16:32:26,782 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 70 selfloop transitions, 33 changer transitions 82/187 dead transitions. [2023-11-17 16:32:26,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 187 transitions, 1082 flow [2023-11-17 16:32:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:32:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:32:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2059 transitions. [2023-11-17 16:32:26,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35746527777777776 [2023-11-17 16:32:26,787 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2059 transitions. [2023-11-17 16:32:26,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2059 transitions. [2023-11-17 16:32:26,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:26,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2059 transitions. [2023-11-17 16:32:26,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.79166666666667) internal successors, (2059), 24 states have internal predecessors, (2059), 0 states have call successors, (0), 0 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 16:32:26,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 240.0) internal successors, (6000), 25 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 16:32:26,799 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 240.0) internal successors, (6000), 25 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 16:32:26,799 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 192 flow. Second operand 24 states and 2059 transitions. [2023-11-17 16:32:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 187 transitions, 1082 flow [2023-11-17 16:32:26,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 187 transitions, 1064 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-17 16:32:26,804 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 446 flow [2023-11-17 16:32:26,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=446, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-11-17 16:32:26,804 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-17 16:32:26,805 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 446 flow [2023-11-17 16:32:26,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 79.75) internal successors, (1914), 24 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 16:32:26,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:26,814 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 16:32:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:27,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:27,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 810880491, now seen corresponding path program 5 times [2023-11-17 16:32:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196755407] [2023-11-17 16:32:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196755407] [2023-11-17 16:32:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196755407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15673014] [2023-11-17 16:32:27,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:32:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:27,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:27,444 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 16:32:27,463 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 16:32:27,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:32:27,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:27,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:32:27,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:27,796 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:27,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:32:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:27,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:27,862 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:32:27,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:32:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15673014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:28,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:28,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-17 16:32:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034236111] [2023-11-17 16:32:28,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:28,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:32:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:32:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:32:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:28,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 446 flow. Second operand has 24 states, 24 states have (on average 80.0) internal successors, (1920), 24 states have internal predecessors, (1920), 0 states have call successors, (0), 0 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 16:32:28,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:28,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:29,056 INFO L124 PetriNetUnfolderBase]: 435/882 cut-off events. [2023-11-17 16:32:29,056 INFO L125 PetriNetUnfolderBase]: For 2364/2366 co-relation queries the response was YES. [2023-11-17 16:32:29,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 882 events. 435/882 cut-off events. For 2364/2366 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5027 event pairs, 124 based on Foata normal form. 2/882 useless extension candidates. Maximal degree in co-relation 2403. Up to 385 conditions per place. [2023-11-17 16:32:29,061 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 53 selfloop transitions, 13 changer transitions 64/132 dead transitions. [2023-11-17 16:32:29,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 132 transitions, 983 flow [2023-11-17 16:32:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:32:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:32:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1358 transitions. [2023-11-17 16:32:29,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3536458333333333 [2023-11-17 16:32:29,068 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1358 transitions. [2023-11-17 16:32:29,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1358 transitions. [2023-11-17 16:32:29,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:29,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1358 transitions. [2023-11-17 16:32:29,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.875) internal successors, (1358), 16 states have internal predecessors, (1358), 0 states have call successors, (0), 0 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 16:32:29,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 240.0) internal successors, (4080), 17 states have internal predecessors, (4080), 0 states have call successors, (0), 0 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 16:32:29,079 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 240.0) internal successors, (4080), 17 states have internal predecessors, (4080), 0 states have call successors, (0), 0 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 16:32:29,079 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 446 flow. Second operand 16 states and 1358 transitions. [2023-11-17 16:32:29,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 132 transitions, 983 flow [2023-11-17 16:32:29,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 132 transitions, 903 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-11-17 16:32:29,088 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 374 flow [2023-11-17 16:32:29,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=374, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-11-17 16:32:29,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-17 16:32:29,091 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 374 flow [2023-11-17 16:32:29,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.0) internal successors, (1920), 24 states have internal predecessors, (1920), 0 states have call successors, (0), 0 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 16:32:29,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:29,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:29,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:29,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:29,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 510999807, now seen corresponding path program 6 times [2023-11-17 16:32:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939514436] [2023-11-17 16:32:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939514436] [2023-11-17 16:32:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939514436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884730387] [2023-11-17 16:32:29,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:32:29,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:29,789 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 16:32:29,805 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 16:32:29,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:32:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:29,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:32:29,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:30,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:30,043 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 21 treesize of output 16 [2023-11-17 16:32:30,140 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-17 16:32:30,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-17 16:32:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:30,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:30,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:30,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-17 16:32:30,383 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 13 treesize of output 7 [2023-11-17 16:32:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884730387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:30,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 16:32:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537052485] [2023-11-17 16:32:30,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:32:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:32:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-17 16:32:30,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:32:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 374 flow. Second operand has 27 states, 27 states have (on average 74.77777777777777) internal successors, (2019), 27 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:32:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:30,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:32:30,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:31,196 INFO L124 PetriNetUnfolderBase]: 322/639 cut-off events. [2023-11-17 16:32:31,196 INFO L125 PetriNetUnfolderBase]: For 1774/1776 co-relation queries the response was YES. [2023-11-17 16:32:31,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 639 events. 322/639 cut-off events. For 1774/1776 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3170 event pairs, 112 based on Foata normal form. 1/639 useless extension candidates. Maximal degree in co-relation 2187. Up to 385 conditions per place. [2023-11-17 16:32:31,200 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 37 selfloop transitions, 10 changer transitions 25/74 dead transitions. [2023-11-17 16:32:31,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 624 flow [2023-11-17 16:32:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:32:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:32:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 854 transitions. [2023-11-17 16:32:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3234848484848485 [2023-11-17 16:32:31,203 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 854 transitions. [2023-11-17 16:32:31,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 854 transitions. [2023-11-17 16:32:31,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:31,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 854 transitions. [2023-11-17 16:32:31,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.63636363636364) internal successors, (854), 11 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 16:32:31,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 16:32:31,209 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 16:32:31,209 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 374 flow. Second operand 11 states and 854 transitions. [2023-11-17 16:32:31,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 624 flow [2023-11-17 16:32:31,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 583 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-17 16:32:31,218 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 337 flow [2023-11-17 16:32:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-11-17 16:32:31,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-17 16:32:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 337 flow [2023-11-17 16:32:31,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.77777777777777) internal successors, (2019), 27 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:32:31,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:31,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:31,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:31,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:31,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:31,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1713820192, now seen corresponding path program 7 times [2023-11-17 16:32:31,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:31,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327962513] [2023-11-17 16:32:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:31,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327962513] [2023-11-17 16:32:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327962513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466241406] [2023-11-17 16:32:31,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:32:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:31,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:31,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:32:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:32,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:32:32,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:32,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:32,177 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:32:32,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:32:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466241406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:32,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:32,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 14 [2023-11-17 16:32:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467989742] [2023-11-17 16:32:32,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:32,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:32:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:32:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:32:32,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 337 flow. Second operand has 16 states, 16 states have (on average 80.1875) internal successors, (1283), 16 states have internal predecessors, (1283), 0 states have call successors, (0), 0 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 16:32:32,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:32,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:32,850 INFO L124 PetriNetUnfolderBase]: 455/873 cut-off events. [2023-11-17 16:32:32,850 INFO L125 PetriNetUnfolderBase]: For 2158/2160 co-relation queries the response was YES. [2023-11-17 16:32:32,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 873 events. 455/873 cut-off events. For 2158/2160 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4771 event pairs, 38 based on Foata normal form. 1/872 useless extension candidates. Maximal degree in co-relation 3022. Up to 168 conditions per place. [2023-11-17 16:32:32,858 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 85 selfloop transitions, 40 changer transitions 60/187 dead transitions. [2023-11-17 16:32:32,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 187 transitions, 1260 flow [2023-11-17 16:32:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:32:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:32:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2050 transitions. [2023-11-17 16:32:32,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3559027777777778 [2023-11-17 16:32:32,870 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2050 transitions. [2023-11-17 16:32:32,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2050 transitions. [2023-11-17 16:32:32,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:32,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2050 transitions. [2023-11-17 16:32:32,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.41666666666667) internal successors, (2050), 24 states have internal predecessors, (2050), 0 states have call successors, (0), 0 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 16:32:32,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 240.0) internal successors, (6000), 25 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 16:32:32,890 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 240.0) internal successors, (6000), 25 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 16:32:32,890 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 337 flow. Second operand 24 states and 2050 transitions. [2023-11-17 16:32:32,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 187 transitions, 1260 flow [2023-11-17 16:32:32,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 187 transitions, 1153 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-11-17 16:32:32,909 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 529 flow [2023-11-17 16:32:32,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=529, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-11-17 16:32:32,910 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-11-17 16:32:32,910 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 529 flow [2023-11-17 16:32:32,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.1875) internal successors, (1283), 16 states have internal predecessors, (1283), 0 states have call successors, (0), 0 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 16:32:32,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:32,911 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:32,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:33,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:33,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:33,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1591791346, now seen corresponding path program 8 times [2023-11-17 16:32:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903431596] [2023-11-17 16:32:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:33,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:33,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903431596] [2023-11-17 16:32:33,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903431596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157101563] [2023-11-17 16:32:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:32:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:33,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:33,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:32:33,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:32:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:33,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:32:33,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:33,974 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 21 treesize of output 16 [2023-11-17 16:32:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:32:34,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:34,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:34,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-11-17 16:32:34,102 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 10 treesize of output 3 [2023-11-17 16:32:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157101563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:34,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:34,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-11-17 16:32:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753573744] [2023-11-17 16:32:34,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:34,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:32:34,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:32:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=485, Unknown=3, NotChecked=0, Total=552 [2023-11-17 16:32:34,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:32:34,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 529 flow. Second operand has 24 states, 24 states have (on average 74.79166666666667) internal successors, (1795), 24 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 16:32:34,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:34,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:32:34,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:34,814 INFO L124 PetriNetUnfolderBase]: 505/966 cut-off events. [2023-11-17 16:32:34,814 INFO L125 PetriNetUnfolderBase]: For 1938/1940 co-relation queries the response was YES. [2023-11-17 16:32:34,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 966 events. 505/966 cut-off events. For 1938/1940 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5424 event pairs, 62 based on Foata normal form. 1/965 useless extension candidates. Maximal degree in co-relation 3277. Up to 186 conditions per place. [2023-11-17 16:32:34,820 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 53 selfloop transitions, 41 changer transitions 30/126 dead transitions. [2023-11-17 16:32:34,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 997 flow [2023-11-17 16:32:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:32:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:32:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1270 transitions. [2023-11-17 16:32:34,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307291666666667 [2023-11-17 16:32:34,823 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1270 transitions. [2023-11-17 16:32:34,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1270 transitions. [2023-11-17 16:32:34,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:34,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1270 transitions. [2023-11-17 16:32:34,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.375) internal successors, (1270), 16 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 16:32:34,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 240.0) internal successors, (4080), 17 states have internal predecessors, (4080), 0 states have call successors, (0), 0 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 16:32:34,831 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 240.0) internal successors, (4080), 17 states have internal predecessors, (4080), 0 states have call successors, (0), 0 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 16:32:34,831 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 529 flow. Second operand 16 states and 1270 transitions. [2023-11-17 16:32:34,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 997 flow [2023-11-17 16:32:34,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 921 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-11-17 16:32:34,839 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 590 flow [2023-11-17 16:32:34,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=590, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2023-11-17 16:32:34,840 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-17 16:32:34,840 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 590 flow [2023-11-17 16:32:34,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.79166666666667) internal successors, (1795), 24 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 16:32:34,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:34,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:34,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:35,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:32:35,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:35,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1649526946, now seen corresponding path program 9 times [2023-11-17 16:32:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393184204] [2023-11-17 16:32:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:35,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393184204] [2023-11-17 16:32:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393184204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531537025] [2023-11-17 16:32:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:32:35,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:35,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:35,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:32:35,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:32:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:35,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:32:35,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:35,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531537025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:35,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-11-17 16:32:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389960843] [2023-11-17 16:32:35,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:35,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:32:35,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:32:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:32:35,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-17 16:32:35,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 590 flow. Second operand has 11 states, 11 states have (on average 110.72727272727273) internal successors, (1218), 11 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 16:32:35,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:35,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-17 16:32:35,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:35,650 INFO L124 PetriNetUnfolderBase]: 1015/1911 cut-off events. [2023-11-17 16:32:35,650 INFO L125 PetriNetUnfolderBase]: For 6319/6323 co-relation queries the response was YES. [2023-11-17 16:32:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1911 events. 1015/1911 cut-off events. For 6319/6323 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12151 event pairs, 222 based on Foata normal form. 18/1925 useless extension candidates. Maximal degree in co-relation 6475. Up to 669 conditions per place. [2023-11-17 16:32:35,660 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 67 selfloop transitions, 49 changer transitions 0/118 dead transitions. [2023-11-17 16:32:35,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 118 transitions, 1345 flow [2023-11-17 16:32:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:32:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:32:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-11-17 16:32:35,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2023-11-17 16:32:35,663 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-11-17 16:32:35,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-11-17 16:32:35,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:35,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-11-17 16:32:35,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 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 16:32:35,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 16:32:35,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 16:32:35,668 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 590 flow. Second operand 5 states and 583 transitions. [2023-11-17 16:32:35,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 118 transitions, 1345 flow [2023-11-17 16:32:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 118 transitions, 1236 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-11-17 16:32:35,680 INFO L231 Difference]: Finished difference. Result has 73 places, 92 transitions, 1047 flow [2023-11-17 16:32:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1047, PETRI_PLACES=73, PETRI_TRANSITIONS=92} [2023-11-17 16:32:35,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-11-17 16:32:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 92 transitions, 1047 flow [2023-11-17 16:32:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 110.72727272727273) internal successors, (1218), 11 states have internal predecessors, (1218), 0 states have call successors, (0), 0 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 16:32:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:35,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:35,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:35,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:35,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -963573551, now seen corresponding path program 10 times [2023-11-17 16:32:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:35,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321135524] [2023-11-17 16:32:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321135524] [2023-11-17 16:32:36,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321135524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511561413] [2023-11-17 16:32:36,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:32:36,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:36,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:36,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:32:36,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:32:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:36,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:32:36,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:32:36,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:36,548 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:36,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 16:32:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 16:32:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511561413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:36,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:36,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 17 [2023-11-17 16:32:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114623294] [2023-11-17 16:32:36,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:32:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:32:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:32:36,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:36,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 92 transitions, 1047 flow. Second operand has 19 states, 19 states have (on average 79.94736842105263) internal successors, (1519), 19 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 16:32:36,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:36,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:36,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:38,235 INFO L124 PetriNetUnfolderBase]: 1647/3173 cut-off events. [2023-11-17 16:32:38,235 INFO L125 PetriNetUnfolderBase]: For 10749/10751 co-relation queries the response was YES. [2023-11-17 16:32:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11377 conditions, 3173 events. 1647/3173 cut-off events. For 10749/10751 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22115 event pairs, 90 based on Foata normal form. 97/3268 useless extension candidates. Maximal degree in co-relation 11336. Up to 666 conditions per place. [2023-11-17 16:32:38,256 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 171 selfloop transitions, 124 changer transitions 132/429 dead transitions. [2023-11-17 16:32:38,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 429 transitions, 3434 flow [2023-11-17 16:32:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:32:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:32:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4045 transitions. [2023-11-17 16:32:38,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35859929078014185 [2023-11-17 16:32:38,264 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4045 transitions. [2023-11-17 16:32:38,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4045 transitions. [2023-11-17 16:32:38,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:38,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4045 transitions. [2023-11-17 16:32:38,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 86.06382978723404) internal successors, (4045), 47 states have internal predecessors, (4045), 0 states have call successors, (0), 0 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 16:32:38,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 0 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 16:32:38,285 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 0 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 16:32:38,286 INFO L175 Difference]: Start difference. First operand has 73 places, 92 transitions, 1047 flow. Second operand 47 states and 4045 transitions. [2023-11-17 16:32:38,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 429 transitions, 3434 flow [2023-11-17 16:32:38,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 429 transitions, 3295 flow, removed 61 selfloop flow, removed 1 redundant places. [2023-11-17 16:32:38,319 INFO L231 Difference]: Finished difference. Result has 135 places, 144 transitions, 1962 flow [2023-11-17 16:32:38,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1962, PETRI_PLACES=135, PETRI_TRANSITIONS=144} [2023-11-17 16:32:38,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-17 16:32:38,320 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 144 transitions, 1962 flow [2023-11-17 16:32:38,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.94736842105263) internal successors, (1519), 19 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 16:32:38,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:38,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:38,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:38,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:32:38,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:38,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash 504872601, now seen corresponding path program 11 times [2023-11-17 16:32:38,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:38,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23726232] [2023-11-17 16:32:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23726232] [2023-11-17 16:32:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23726232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698775522] [2023-11-17 16:32:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:32:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:38,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:38,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:32:39,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:32:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:39,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:32:39,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:39,388 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:32:39,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:32:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:39,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:39,527 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:32:39,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:32:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:39,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698775522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:39,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:39,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-17 16:32:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224070171] [2023-11-17 16:32:40,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:32:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:32:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:32:40,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:40,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 1962 flow. Second operand has 33 states, 33 states have (on average 79.72727272727273) internal successors, (2631), 33 states have internal predecessors, (2631), 0 states have call successors, (0), 0 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 16:32:40,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:40,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:40,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:42,996 INFO L124 PetriNetUnfolderBase]: 2213/4317 cut-off events. [2023-11-17 16:32:42,996 INFO L125 PetriNetUnfolderBase]: For 27402/27404 co-relation queries the response was YES. [2023-11-17 16:32:43,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 4317 events. 2213/4317 cut-off events. For 27402/27404 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31768 event pairs, 420 based on Foata normal form. 80/4395 useless extension candidates. Maximal degree in co-relation 17644. Up to 1522 conditions per place. [2023-11-17 16:32:43,030 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 128 selfloop transitions, 34 changer transitions 268/432 dead transitions. [2023-11-17 16:32:43,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 432 transitions, 4618 flow [2023-11-17 16:32:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:32:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:32:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3423 transitions. [2023-11-17 16:32:43,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565625 [2023-11-17 16:32:43,036 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3423 transitions. [2023-11-17 16:32:43,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3423 transitions. [2023-11-17 16:32:43,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:43,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3423 transitions. [2023-11-17 16:32:43,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 85.575) internal successors, (3423), 40 states have internal predecessors, (3423), 0 states have call successors, (0), 0 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 16:32:43,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 240.0) internal successors, (9840), 41 states have internal predecessors, (9840), 0 states have call successors, (0), 0 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 16:32:43,054 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 240.0) internal successors, (9840), 41 states have internal predecessors, (9840), 0 states have call successors, (0), 0 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 16:32:43,054 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 1962 flow. Second operand 40 states and 3423 transitions. [2023-11-17 16:32:43,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 432 transitions, 4618 flow [2023-11-17 16:32:43,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 432 transitions, 4231 flow, removed 103 selfloop flow, removed 15 redundant places. [2023-11-17 16:32:43,171 INFO L231 Difference]: Finished difference. Result has 175 places, 117 transitions, 1616 flow [2023-11-17 16:32:43,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1616, PETRI_PLACES=175, PETRI_TRANSITIONS=117} [2023-11-17 16:32:43,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-11-17 16:32:43,172 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 117 transitions, 1616 flow [2023-11-17 16:32:43,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 79.72727272727273) internal successors, (2631), 33 states have internal predecessors, (2631), 0 states have call successors, (0), 0 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 16:32:43,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:43,173 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:43,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:43,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:32:43,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:43,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1930698069, now seen corresponding path program 12 times [2023-11-17 16:32:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359327018] [2023-11-17 16:32:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:43,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:43,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359327018] [2023-11-17 16:32:43,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359327018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:43,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703842333] [2023-11-17 16:32:43,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:32:43,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:43,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:43,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:32:43,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:32:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:43,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:32:43,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:44,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:44,273 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:32:44,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:32:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:44,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703842333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:44,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:44,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-17 16:32:44,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713584516] [2023-11-17 16:32:44,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:32:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:32:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:32:44,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:32:44,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 117 transitions, 1616 flow. Second operand has 33 states, 33 states have (on average 79.72727272727273) internal successors, (2631), 33 states have internal predecessors, (2631), 0 states have call successors, (0), 0 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 16:32:44,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:44,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:32:44,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:46,757 INFO L124 PetriNetUnfolderBase]: 1562/3010 cut-off events. [2023-11-17 16:32:46,758 INFO L125 PetriNetUnfolderBase]: For 45847/45849 co-relation queries the response was YES. [2023-11-17 16:32:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14457 conditions, 3010 events. 1562/3010 cut-off events. For 45847/45849 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20261 event pairs, 96 based on Foata normal form. 12/3020 useless extension candidates. Maximal degree in co-relation 14379. Up to 630 conditions per place. [2023-11-17 16:32:46,785 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 144 selfloop transitions, 96 changer transitions 174/416 dead transitions. [2023-11-17 16:32:46,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 416 transitions, 4212 flow [2023-11-17 16:32:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:32:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:32:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3942 transitions. [2023-11-17 16:32:46,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35706521739130437 [2023-11-17 16:32:46,797 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3942 transitions. [2023-11-17 16:32:46,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3942 transitions. [2023-11-17 16:32:46,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:46,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3942 transitions. [2023-11-17 16:32:46,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 85.69565217391305) internal successors, (3942), 46 states have internal predecessors, (3942), 0 states have call successors, (0), 0 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 16:32:46,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 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 16:32:46,827 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 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 16:32:46,827 INFO L175 Difference]: Start difference. First operand has 175 places, 117 transitions, 1616 flow. Second operand 46 states and 3942 transitions. [2023-11-17 16:32:46,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 416 transitions, 4212 flow [2023-11-17 16:32:47,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 416 transitions, 3769 flow, removed 186 selfloop flow, removed 29 redundant places. [2023-11-17 16:32:47,055 INFO L231 Difference]: Finished difference. Result has 170 places, 129 transitions, 1950 flow [2023-11-17 16:32:47,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1950, PETRI_PLACES=170, PETRI_TRANSITIONS=129} [2023-11-17 16:32:47,057 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-11-17 16:32:47,057 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 129 transitions, 1950 flow [2023-11-17 16:32:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 79.72727272727273) internal successors, (2631), 33 states have internal predecessors, (2631), 0 states have call successors, (0), 0 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 16:32:47,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:47,058 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:47,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:47,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:32:47,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:47,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1630783937, now seen corresponding path program 13 times [2023-11-17 16:32:47,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112539715] [2023-11-17 16:32:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112539715] [2023-11-17 16:32:47,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112539715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268582923] [2023-11-17 16:32:47,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:32:47,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:47,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:47,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:32:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:47,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:32:47,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:32:47,981 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 21 treesize of output 16 [2023-11-17 16:32:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:32:48,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:48,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:48,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-11-17 16:32:48,126 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 10 treesize of output 3 [2023-11-17 16:32:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:32:48,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268582923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:48,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:48,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 27 [2023-11-17 16:32:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514068155] [2023-11-17 16:32:48,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:48,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:32:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:32:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=735, Unknown=3, NotChecked=0, Total=812 [2023-11-17 16:32:48,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:32:48,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 129 transitions, 1950 flow. Second operand has 29 states, 29 states have (on average 74.65517241379311) internal successors, (2165), 29 states have internal predecessors, (2165), 0 states have call successors, (0), 0 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 16:32:48,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:48,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:32:48,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:49,525 INFO L124 PetriNetUnfolderBase]: 1398/2645 cut-off events. [2023-11-17 16:32:49,526 INFO L125 PetriNetUnfolderBase]: For 27996/27998 co-relation queries the response was YES. [2023-11-17 16:32:49,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12260 conditions, 2645 events. 1398/2645 cut-off events. For 27996/27998 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17001 event pairs, 154 based on Foata normal form. 11/2654 useless extension candidates. Maximal degree in co-relation 12187. Up to 560 conditions per place. [2023-11-17 16:32:49,541 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 42 selfloop transitions, 105 changer transitions 80/229 dead transitions. [2023-11-17 16:32:49,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 229 transitions, 2820 flow [2023-11-17 16:32:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:32:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:32:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1678 transitions. [2023-11-17 16:32:49,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329365079365079 [2023-11-17 16:32:49,544 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1678 transitions. [2023-11-17 16:32:49,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1678 transitions. [2023-11-17 16:32:49,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:49,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1678 transitions. [2023-11-17 16:32:49,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.9047619047619) internal successors, (1678), 21 states have internal predecessors, (1678), 0 states have call successors, (0), 0 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 16:32:49,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 16:32:49,556 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 16:32:49,556 INFO L175 Difference]: Start difference. First operand has 170 places, 129 transitions, 1950 flow. Second operand 21 states and 1678 transitions. [2023-11-17 16:32:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 229 transitions, 2820 flow [2023-11-17 16:32:49,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 229 transitions, 2341 flow, removed 178 selfloop flow, removed 22 redundant places. [2023-11-17 16:32:49,644 INFO L231 Difference]: Finished difference. Result has 151 places, 123 transitions, 1942 flow [2023-11-17 16:32:49,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1942, PETRI_PLACES=151, PETRI_TRANSITIONS=123} [2023-11-17 16:32:49,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2023-11-17 16:32:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 123 transitions, 1942 flow [2023-11-17 16:32:49,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 74.65517241379311) internal successors, (2165), 29 states have internal predecessors, (2165), 0 states have call successors, (0), 0 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 16:32:49,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:49,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:49,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:32:49,848 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:49,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 724341372, now seen corresponding path program 14 times [2023-11-17 16:32:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:49,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172130212] [2023-11-17 16:32:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:49,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:32:49,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:49,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172130212] [2023-11-17 16:32:49,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172130212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:49,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941564203] [2023-11-17 16:32:49,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:32:49,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:49,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:49,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:32:50,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:32:50,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:50,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:32:50,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:32:50,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:32:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941564203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:50,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-11-17 16:32:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151272505] [2023-11-17 16:32:50,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:32:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:32:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:32:50,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-17 16:32:50,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 123 transitions, 1942 flow. Second operand has 14 states, 14 states have (on average 110.21428571428571) internal successors, (1543), 14 states have internal predecessors, (1543), 0 states have call successors, (0), 0 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 16:32:50,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:50,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-17 16:32:50,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:50,678 INFO L124 PetriNetUnfolderBase]: 2226/4113 cut-off events. [2023-11-17 16:32:50,679 INFO L125 PetriNetUnfolderBase]: For 31820/31822 co-relation queries the response was YES. [2023-11-17 16:32:50,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18531 conditions, 4113 events. 2226/4113 cut-off events. For 31820/31822 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28183 event pairs, 339 based on Foata normal form. 12/4123 useless extension candidates. Maximal degree in co-relation 18458. Up to 1177 conditions per place. [2023-11-17 16:32:50,701 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 88 selfloop transitions, 126 changer transitions 0/216 dead transitions. [2023-11-17 16:32:50,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 216 transitions, 3831 flow [2023-11-17 16:32:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:32:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:32:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 701 transitions. [2023-11-17 16:32:50,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48680555555555555 [2023-11-17 16:32:50,704 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 701 transitions. [2023-11-17 16:32:50,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 701 transitions. [2023-11-17 16:32:50,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:50,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 701 transitions. [2023-11-17 16:32:50,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.83333333333333) internal successors, (701), 6 states have internal predecessors, (701), 0 states have call successors, (0), 0 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 16:32:50,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 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 16:32:50,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 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 16:32:50,707 INFO L175 Difference]: Start difference. First operand has 151 places, 123 transitions, 1942 flow. Second operand 6 states and 701 transitions. [2023-11-17 16:32:50,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 216 transitions, 3831 flow [2023-11-17 16:32:50,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 3147 flow, removed 192 selfloop flow, removed 29 redundant places. [2023-11-17 16:32:50,783 INFO L231 Difference]: Finished difference. Result has 111 places, 183 transitions, 2866 flow [2023-11-17 16:32:50,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2866, PETRI_PLACES=111, PETRI_TRANSITIONS=183} [2023-11-17 16:32:50,783 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-11-17 16:32:50,783 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 183 transitions, 2866 flow [2023-11-17 16:32:50,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.21428571428571) internal successors, (1543), 14 states have internal predecessors, (1543), 0 states have call successors, (0), 0 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 16:32:50,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:50,784 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:50,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:50,990 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:50,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash -935143677, now seen corresponding path program 15 times [2023-11-17 16:32:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:50,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446482910] [2023-11-17 16:32:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446482910] [2023-11-17 16:32:51,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446482910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836893148] [2023-11-17 16:32:51,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:32:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:51,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:51,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:32:51,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:32:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:51,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 16:32:51,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:51,796 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 23 treesize of output 1 [2023-11-17 16:32:51,836 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 16:32:51,870 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 16:32:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:52,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:52,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:52,779 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 61 treesize of output 49 [2023-11-17 16:32:52,787 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:32:52,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 132 [2023-11-17 16:32:52,795 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-17 16:32:52,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 101 [2023-11-17 16:32:52,803 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-17 16:32:52,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2023-11-17 16:32:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836893148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:53,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-11-17 16:32:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867074731] [2023-11-17 16:32:53,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:32:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:32:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1584, Unknown=1, NotChecked=0, Total=1892 [2023-11-17 16:32:53,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 240 [2023-11-17 16:32:53,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 183 transitions, 2866 flow. Second operand has 44 states, 44 states have (on average 71.31818181818181) internal successors, (3138), 44 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 16:32:53,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:53,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 240 [2023-11-17 16:32:53,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:33:09,418 INFO L124 PetriNetUnfolderBase]: 11931/22455 cut-off events. [2023-11-17 16:33:09,418 INFO L125 PetriNetUnfolderBase]: For 128556/128558 co-relation queries the response was YES. [2023-11-17 16:33:09,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91207 conditions, 22455 events. 11931/22455 cut-off events. For 128556/128558 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 204405 event pairs, 944 based on Foata normal form. 685/23138 useless extension candidates. Maximal degree in co-relation 74147. Up to 5793 conditions per place. [2023-11-17 16:33:09,572 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 900 selfloop transitions, 813 changer transitions 314/2029 dead transitions. [2023-11-17 16:33:09,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2029 transitions, 24074 flow [2023-11-17 16:33:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-11-17 16:33:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2023-11-17 16:33:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 12415 transitions. [2023-11-17 16:33:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32739978902953587 [2023-11-17 16:33:09,587 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 12415 transitions. [2023-11-17 16:33:09,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 12415 transitions. [2023-11-17 16:33:09,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:33:09,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 12415 transitions. [2023-11-17 16:33:09,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 78.57594936708861) internal successors, (12415), 158 states have internal predecessors, (12415), 0 states have call successors, (0), 0 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 16:33:09,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 240.0) internal successors, (38160), 159 states have internal predecessors, (38160), 0 states have call successors, (0), 0 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 16:33:09,637 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 240.0) internal successors, (38160), 159 states have internal predecessors, (38160), 0 states have call successors, (0), 0 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 16:33:09,637 INFO L175 Difference]: Start difference. First operand has 111 places, 183 transitions, 2866 flow. Second operand 158 states and 12415 transitions. [2023-11-17 16:33:09,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2029 transitions, 24074 flow [2023-11-17 16:33:10,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 2029 transitions, 23638 flow, removed 218 selfloop flow, removed 0 redundant places. [2023-11-17 16:33:10,222 INFO L231 Difference]: Finished difference. Result has 363 places, 1002 transitions, 17936 flow [2023-11-17 16:33:10,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=17936, PETRI_PLACES=363, PETRI_TRANSITIONS=1002} [2023-11-17 16:33:10,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-11-17 16:33:10,223 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1002 transitions, 17936 flow [2023-11-17 16:33:10,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 71.31818181818181) internal successors, (3138), 44 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 16:33:10,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:33:10,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:33:10,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:33:10,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:33:10,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:33:10,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:33:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash -335357789, now seen corresponding path program 16 times [2023-11-17 16:33:10,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:33:10,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171341299] [2023-11-17 16:33:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:33:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:33:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:33:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:33:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:33:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171341299] [2023-11-17 16:33:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171341299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:33:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277414101] [2023-11-17 16:33:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:33:11,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:33:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:33:11,103 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:33:11,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:33:11,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:33:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:33:11,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:33:11,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:33:11,833 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:33:11,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:33:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:33:11,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:33:11,958 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:33:11,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:33:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:33:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277414101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:33:12,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:33:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 16:33:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495761134] [2023-11-17 16:33:12,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:33:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:33:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:33:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:33:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:33:12,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:33:12,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1002 transitions, 17936 flow. Second operand has 42 states, 42 states have (on average 79.57142857142857) internal successors, (3342), 42 states have internal predecessors, (3342), 0 states have call successors, (0), 0 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 16:33:12,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:33:12,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:33:12,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:33:39,255 INFO L124 PetriNetUnfolderBase]: 25089/47224 cut-off events. [2023-11-17 16:33:39,255 INFO L125 PetriNetUnfolderBase]: For 1845103/1845105 co-relation queries the response was YES. [2023-11-17 16:33:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244055 conditions, 47224 events. 25089/47224 cut-off events. For 1845103/1845105 co-relation queries the response was YES. Maximal size of possible extension queue 1951. Compared 461584 event pairs, 2178 based on Foata normal form. 297/47519 useless extension candidates. Maximal degree in co-relation 240680. Up to 12550 conditions per place. [2023-11-17 16:33:40,623 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 1136 selfloop transitions, 2339 changer transitions 191/3668 dead transitions. [2023-11-17 16:33:40,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 3668 transitions, 69380 flow [2023-11-17 16:33:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-11-17 16:33:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2023-11-17 16:33:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 14252 transitions. [2023-11-17 16:33:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598989898989899 [2023-11-17 16:33:40,640 INFO L72 ComplementDD]: Start complementDD. Operand 165 states and 14252 transitions. [2023-11-17 16:33:40,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 165 states and 14252 transitions. [2023-11-17 16:33:40,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:33:40,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 165 states and 14252 transitions. [2023-11-17 16:33:40,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 166 states, 165 states have (on average 86.37575757575758) internal successors, (14252), 165 states have internal predecessors, (14252), 0 states have call successors, (0), 0 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 16:33:40,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 166 states, 166 states have (on average 240.0) internal successors, (39840), 166 states have internal predecessors, (39840), 0 states have call successors, (0), 0 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 16:33:40,697 INFO L81 ComplementDD]: Finished complementDD. Result has 166 states, 166 states have (on average 240.0) internal successors, (39840), 166 states have internal predecessors, (39840), 0 states have call successors, (0), 0 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 16:33:40,697 INFO L175 Difference]: Start difference. First operand has 363 places, 1002 transitions, 17936 flow. Second operand 165 states and 14252 transitions. [2023-11-17 16:33:40,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 3668 transitions, 69380 flow [2023-11-17 16:33:48,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 3668 transitions, 56227 flow, removed 6563 selfloop flow, removed 11 redundant places. [2023-11-17 16:33:48,860 INFO L231 Difference]: Finished difference. Result has 552 places, 2589 transitions, 40714 flow [2023-11-17 16:33:48,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=15347, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=40714, PETRI_PLACES=552, PETRI_TRANSITIONS=2589} [2023-11-17 16:33:48,862 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 531 predicate places. [2023-11-17 16:33:48,862 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2589 transitions, 40714 flow [2023-11-17 16:33:48,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 79.57142857142857) internal successors, (3342), 42 states have internal predecessors, (3342), 0 states have call successors, (0), 0 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 16:33:48,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:33:48,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:33:48,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:33:49,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:33:49,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:33:49,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:33:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 345181619, now seen corresponding path program 17 times [2023-11-17 16:33:49,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:33:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049613352] [2023-11-17 16:33:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:33:49,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:33:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:33:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:33:49,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:33:49,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049613352] [2023-11-17 16:33:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049613352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:33:49,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172507167] [2023-11-17 16:33:49,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:33:49,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:33:49,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:33:49,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:33:49,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:33:49,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:33:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:33:49,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:33:49,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:33:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:33:49,726 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 10 treesize of output 8 [2023-11-17 16:33:49,822 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:33:49,852 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:33:49,876 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 16:33:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:33:50,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:33:50,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:33:50,481 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 60 treesize of output 48 [2023-11-17 16:33:50,492 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:33:50,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 127 [2023-11-17 16:33:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:33:50,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2023-11-17 16:33:50,508 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:33:50,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 88 [2023-11-17 16:33:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:33:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172507167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:33:50,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:33:50,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2023-11-17 16:33:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152289580] [2023-11-17 16:33:50,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:33:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:33:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:33:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:33:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1169, Unknown=3, NotChecked=0, Total=1406 [2023-11-17 16:33:50,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 240 [2023-11-17 16:33:50,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2589 transitions, 40714 flow. Second operand has 38 states, 38 states have (on average 71.47368421052632) internal successors, (2716), 38 states have internal predecessors, (2716), 0 states have call successors, (0), 0 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 16:33:50,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:33:50,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 240 [2023-11-17 16:33:50,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:17,878 INFO L124 PetriNetUnfolderBase]: 24250/45366 cut-off events. [2023-11-17 16:34:17,878 INFO L125 PetriNetUnfolderBase]: For 1777564/1777566 co-relation queries the response was YES. [2023-11-17 16:34:19,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196279 conditions, 45366 events. 24250/45366 cut-off events. For 1777564/1777566 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 428380 event pairs, 8917 based on Foata normal form. 395/45759 useless extension candidates. Maximal degree in co-relation 196075. Up to 36780 conditions per place. [2023-11-17 16:34:19,433 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 171 selfloop transitions, 19 changer transitions 2510/2702 dead transitions. [2023-11-17 16:34:19,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2702 transitions, 45817 flow [2023-11-17 16:34:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:34:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:34:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2543 transitions. [2023-11-17 16:34:19,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210858585858586 [2023-11-17 16:34:19,437 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2543 transitions. [2023-11-17 16:34:19,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2543 transitions. [2023-11-17 16:34:19,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:19,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2543 transitions. [2023-11-17 16:34:19,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 77.06060606060606) internal successors, (2543), 33 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:19,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 240.0) internal successors, (8160), 34 states have internal predecessors, (8160), 0 states have call successors, (0), 0 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 16:34:19,446 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 240.0) internal successors, (8160), 34 states have internal predecessors, (8160), 0 states have call successors, (0), 0 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 16:34:19,446 INFO L175 Difference]: Start difference. First operand has 552 places, 2589 transitions, 40714 flow. Second operand 33 states and 2543 transitions. [2023-11-17 16:34:19,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2702 transitions, 45817 flow [2023-11-17 16:34:26,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 2702 transitions, 35029 flow, removed 5379 selfloop flow, removed 9 redundant places. [2023-11-17 16:34:26,060 INFO L231 Difference]: Finished difference. Result has 574 places, 188 transitions, 3407 flow [2023-11-17 16:34:26,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=28217, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3407, PETRI_PLACES=574, PETRI_TRANSITIONS=188} [2023-11-17 16:34:26,062 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 553 predicate places. [2023-11-17 16:34:26,062 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 188 transitions, 3407 flow [2023-11-17 16:34:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 71.47368421052632) internal successors, (2716), 38 states have internal predecessors, (2716), 0 states have call successors, (0), 0 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 16:34:26,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:26,062 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:26,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:26,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:26,268 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:26,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash 82266530, now seen corresponding path program 18 times [2023-11-17 16:34:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:26,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18888622] [2023-11-17 16:34:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18888622] [2023-11-17 16:34:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18888622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392267587] [2023-11-17 16:34:27,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:34:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:27,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:27,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:34:27,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:34:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:27,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:34:27,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:27,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:27,535 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:34:27,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:34:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:34:27,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392267587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:27,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:27,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 26 [2023-11-17 16:34:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129513225] [2023-11-17 16:34:27,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:34:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:34:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-11-17 16:34:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:34:27,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 188 transitions, 3407 flow. Second operand has 28 states, 28 states have (on average 79.67857142857143) internal successors, (2231), 28 states have internal predecessors, (2231), 0 states have call successors, (0), 0 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 16:34:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:27,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:34:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:31,317 INFO L124 PetriNetUnfolderBase]: 4403/8086 cut-off events. [2023-11-17 16:34:31,317 INFO L125 PetriNetUnfolderBase]: For 149731/149733 co-relation queries the response was YES. [2023-11-17 16:34:31,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35595 conditions, 8086 events. 4403/8086 cut-off events. For 149731/149733 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 62240 event pairs, 224 based on Foata normal form. 16/8100 useless extension candidates. Maximal degree in co-relation 35428. Up to 1963 conditions per place. [2023-11-17 16:34:31,407 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 247 selfloop transitions, 351 changer transitions 249/849 dead transitions. [2023-11-17 16:34:31,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 849 transitions, 9586 flow [2023-11-17 16:34:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-17 16:34:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-17 16:34:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6631 transitions. [2023-11-17 16:34:31,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588203463203463 [2023-11-17 16:34:31,415 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6631 transitions. [2023-11-17 16:34:31,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6631 transitions. [2023-11-17 16:34:31,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:31,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6631 transitions. [2023-11-17 16:34:31,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 86.11688311688312) internal successors, (6631), 77 states have internal predecessors, (6631), 0 states have call successors, (0), 0 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 16:34:31,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 240.0) internal successors, (18720), 78 states have internal predecessors, (18720), 0 states have call successors, (0), 0 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 16:34:31,442 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 240.0) internal successors, (18720), 78 states have internal predecessors, (18720), 0 states have call successors, (0), 0 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 16:34:31,443 INFO L175 Difference]: Start difference. First operand has 574 places, 188 transitions, 3407 flow. Second operand 77 states and 6631 transitions. [2023-11-17 16:34:31,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 849 transitions, 9586 flow [2023-11-17 16:34:31,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 849 transitions, 9023 flow, removed 248 selfloop flow, removed 116 redundant places. [2023-11-17 16:34:31,732 INFO L231 Difference]: Finished difference. Result has 232 places, 371 transitions, 7178 flow [2023-11-17 16:34:31,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=7178, PETRI_PLACES=232, PETRI_TRANSITIONS=371} [2023-11-17 16:34:31,733 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-11-17 16:34:31,733 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 371 transitions, 7178 flow [2023-11-17 16:34:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 79.67857142857143) internal successors, (2231), 28 states have internal predecessors, (2231), 0 states have call successors, (0), 0 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 16:34:31,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:31,734 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:31,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:31,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:31,934 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:31,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash -153633230, now seen corresponding path program 19 times [2023-11-17 16:34:31,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:31,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491939421] [2023-11-17 16:34:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:31,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491939421] [2023-11-17 16:34:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491939421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003138838] [2023-11-17 16:34:32,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:34:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:32,872 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:34:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:33,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 16:34:33,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:33,027 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 16:34:33,320 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 21 treesize of output 16 [2023-11-17 16:34:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:33,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:33,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:33,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2023-11-17 16:34:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:34:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003138838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:33,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 30 [2023-11-17 16:34:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262199674] [2023-11-17 16:34:33,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:33,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:34:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:34:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:34:33,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:34:33,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 371 transitions, 7178 flow. Second operand has 32 states, 32 states have (on average 74.5) internal successors, (2384), 32 states have internal predecessors, (2384), 0 states have call successors, (0), 0 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 16:34:33,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:33,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:34:33,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:36,125 INFO L124 PetriNetUnfolderBase]: 5349/9803 cut-off events. [2023-11-17 16:34:36,125 INFO L125 PetriNetUnfolderBase]: For 77227/77229 co-relation queries the response was YES. [2023-11-17 16:34:36,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44838 conditions, 9803 events. 5349/9803 cut-off events. For 77227/77229 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 77677 event pairs, 348 based on Foata normal form. 1/9802 useless extension candidates. Maximal degree in co-relation 44764. Up to 2067 conditions per place. [2023-11-17 16:34:36,192 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 90 selfloop transitions, 423 changer transitions 73/588 dead transitions. [2023-11-17 16:34:36,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 588 transitions, 10070 flow [2023-11-17 16:34:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:34:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:34:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2317 transitions. [2023-11-17 16:34:36,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329022988505747 [2023-11-17 16:34:36,195 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2317 transitions. [2023-11-17 16:34:36,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2317 transitions. [2023-11-17 16:34:36,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:36,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2317 transitions. [2023-11-17 16:34:36,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.89655172413794) internal successors, (2317), 29 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:36,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 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 16:34:36,203 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 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 16:34:36,203 INFO L175 Difference]: Start difference. First operand has 232 places, 371 transitions, 7178 flow. Second operand 29 states and 2317 transitions. [2023-11-17 16:34:36,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 588 transitions, 10070 flow [2023-11-17 16:34:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 588 transitions, 8907 flow, removed 220 selfloop flow, removed 14 redundant places. [2023-11-17 16:34:36,604 INFO L231 Difference]: Finished difference. Result has 247 places, 447 transitions, 8201 flow [2023-11-17 16:34:36,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8201, PETRI_PLACES=247, PETRI_TRANSITIONS=447} [2023-11-17 16:34:36,605 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-11-17 16:34:36,605 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 447 transitions, 8201 flow [2023-11-17 16:34:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.5) internal successors, (2384), 32 states have internal predecessors, (2384), 0 states have call successors, (0), 0 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 16:34:36,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:36,606 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:36,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:36,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:36,812 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:36,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1748841958, now seen corresponding path program 20 times [2023-11-17 16:34:36,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:36,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763398664] [2023-11-17 16:34:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:34:36,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763398664] [2023-11-17 16:34:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763398664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869020277] [2023-11-17 16:34:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:36,933 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:37,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:34:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:37,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:34:37,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:34:37,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:34:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869020277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:37,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 16 [2023-11-17 16:34:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050167468] [2023-11-17 16:34:37,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:34:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:34:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:34:37,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 240 [2023-11-17 16:34:37,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 447 transitions, 8201 flow. Second operand has 17 states, 17 states have (on average 109.88235294117646) internal successors, (1868), 17 states have internal predecessors, (1868), 0 states have call successors, (0), 0 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 16:34:37,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:37,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 240 [2023-11-17 16:34:37,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:40,227 INFO L124 PetriNetUnfolderBase]: 9531/17407 cut-off events. [2023-11-17 16:34:40,228 INFO L125 PetriNetUnfolderBase]: For 151711/151715 co-relation queries the response was YES. [2023-11-17 16:34:40,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77123 conditions, 17407 events. 9531/17407 cut-off events. For 151711/151715 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 150254 event pairs, 1363 based on Foata normal form. 18/17421 useless extension candidates. Maximal degree in co-relation 77049. Up to 4715 conditions per place. [2023-11-17 16:34:40,364 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 212 selfloop transitions, 539 changer transitions 0/753 dead transitions. [2023-11-17 16:34:40,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 753 transitions, 15771 flow [2023-11-17 16:34:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:34:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:34:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 819 transitions. [2023-11-17 16:34:40,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-11-17 16:34:40,365 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 819 transitions. [2023-11-17 16:34:40,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 819 transitions. [2023-11-17 16:34:40,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:40,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 819 transitions. [2023-11-17 16:34:40,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 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 16:34:40,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 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 16:34:40,368 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 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 16:34:40,368 INFO L175 Difference]: Start difference. First operand has 247 places, 447 transitions, 8201 flow. Second operand 7 states and 819 transitions. [2023-11-17 16:34:40,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 753 transitions, 15771 flow [2023-11-17 16:34:40,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 753 transitions, 15568 flow, removed 75 selfloop flow, removed 12 redundant places. [2023-11-17 16:34:40,984 INFO L231 Difference]: Finished difference. Result has 242 places, 711 transitions, 15124 flow [2023-11-17 16:34:40,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8094, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15124, PETRI_PLACES=242, PETRI_TRANSITIONS=711} [2023-11-17 16:34:40,985 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2023-11-17 16:34:40,985 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 711 transitions, 15124 flow [2023-11-17 16:34:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.88235294117646) internal successors, (1868), 17 states have internal predecessors, (1868), 0 states have call successors, (0), 0 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 16:34:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:40,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:41,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 16:34:41,192 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:41,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1826257513, now seen corresponding path program 21 times [2023-11-17 16:34:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399263178] [2023-11-17 16:34:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:41,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399263178] [2023-11-17 16:34:41,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399263178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147753648] [2023-11-17 16:34:41,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:41,762 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:41,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:34:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:34:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:41,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:34:41,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:34:42,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:42,584 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:34:42,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 16:34:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:34:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147753648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:42,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 40 [2023-11-17 16:34:42,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672370898] [2023-11-17 16:34:42,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:42,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:34:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:34:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:34:42,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:34:42,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 711 transitions, 15124 flow. Second operand has 42 states, 42 states have (on average 79.35714285714286) internal successors, (3333), 42 states have internal predecessors, (3333), 0 states have call successors, (0), 0 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 16:34:42,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:42,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:34:42,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:00,116 INFO L124 PetriNetUnfolderBase]: 21965/41125 cut-off events. [2023-11-17 16:35:00,116 INFO L125 PetriNetUnfolderBase]: For 351217/351219 co-relation queries the response was YES. [2023-11-17 16:35:00,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197987 conditions, 41125 events. 21965/41125 cut-off events. For 351217/351219 co-relation queries the response was YES. Maximal size of possible extension queue 2483. Compared 410700 event pairs, 4774 based on Foata normal form. 908/42031 useless extension candidates. Maximal degree in co-relation 197912. Up to 9399 conditions per place. [2023-11-17 16:35:00,726 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 444 selfloop transitions, 112 changer transitions 1731/2289 dead transitions. [2023-11-17 16:35:00,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 2289 transitions, 44200 flow [2023-11-17 16:35:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-17 16:35:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-11-17 16:35:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 8059 transitions. [2023-11-17 16:35:00,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35722517730496456 [2023-11-17 16:35:00,733 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 8059 transitions. [2023-11-17 16:35:00,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 8059 transitions. [2023-11-17 16:35:00,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:00,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 8059 transitions. [2023-11-17 16:35:00,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 85.73404255319149) internal successors, (8059), 94 states have internal predecessors, (8059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:00,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 240.0) internal successors, (22800), 95 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:00,757 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 240.0) internal successors, (22800), 95 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:00,757 INFO L175 Difference]: Start difference. First operand has 242 places, 711 transitions, 15124 flow. Second operand 94 states and 8059 transitions. [2023-11-17 16:35:00,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 2289 transitions, 44200 flow [2023-11-17 16:35:04,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 2289 transitions, 42968 flow, removed 616 selfloop flow, removed 0 redundant places. [2023-11-17 16:35:04,569 INFO L231 Difference]: Finished difference. Result has 400 places, 459 transitions, 10677 flow [2023-11-17 16:35:04,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=11539, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=10677, PETRI_PLACES=400, PETRI_TRANSITIONS=459} [2023-11-17 16:35:04,570 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2023-11-17 16:35:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 459 transitions, 10677 flow [2023-11-17 16:35:04,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 79.35714285714286) internal successors, (3333), 42 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:04,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:04,570 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:04,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 16:35:04,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:04,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2040930159, now seen corresponding path program 22 times [2023-11-17 16:35:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:04,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904400720] [2023-11-17 16:35:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:04,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:05,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:05,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904400720] [2023-11-17 16:35:05,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904400720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:05,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284550499] [2023-11-17 16:35:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:35:05,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:05,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:05,363 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:05,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:35:05,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:35:05,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:05,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:35:05,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:05,983 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:05,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:35:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:05,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:06,151 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:35:06,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:35:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284550499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:06,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-11-17 16:35:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754266641] [2023-11-17 16:35:06,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-17 16:35:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-17 16:35:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2209, Unknown=0, NotChecked=0, Total=2550 [2023-11-17 16:35:06,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:35:06,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 459 transitions, 10677 flow. Second operand has 51 states, 51 states have (on average 79.47058823529412) internal successors, (4053), 51 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:06,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:06,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:35:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:11,400 INFO L124 PetriNetUnfolderBase]: 6029/11343 cut-off events. [2023-11-17 16:35:11,400 INFO L125 PetriNetUnfolderBase]: For 150722/150722 co-relation queries the response was YES. [2023-11-17 16:35:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59830 conditions, 11343 events. 6029/11343 cut-off events. For 150722/150722 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 94861 event pairs, 1932 based on Foata normal form. 5/11348 useless extension candidates. Maximal degree in co-relation 59689. Up to 8394 conditions per place. [2023-11-17 16:35:11,521 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 399 selfloop transitions, 82 changer transitions 124/607 dead transitions. [2023-11-17 16:35:11,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 607 transitions, 12719 flow [2023-11-17 16:35:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:35:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:35:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2449 transitions. [2023-11-17 16:35:11,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351867816091954 [2023-11-17 16:35:11,523 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2449 transitions. [2023-11-17 16:35:11,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2449 transitions. [2023-11-17 16:35:11,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:11,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2449 transitions. [2023-11-17 16:35:11,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 84.44827586206897) internal successors, (2449), 29 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,530 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,530 INFO L175 Difference]: Start difference. First operand has 400 places, 459 transitions, 10677 flow. Second operand 29 states and 2449 transitions. [2023-11-17 16:35:11,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 607 transitions, 12719 flow [2023-11-17 16:35:13,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 607 transitions, 10493 flow, removed 889 selfloop flow, removed 79 redundant places. [2023-11-17 16:35:13,322 INFO L231 Difference]: Finished difference. Result has 281 places, 439 transitions, 8419 flow [2023-11-17 16:35:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8419, PETRI_PLACES=281, PETRI_TRANSITIONS=439} [2023-11-17 16:35:13,322 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-11-17 16:35:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 439 transitions, 8419 flow [2023-11-17 16:35:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 79.47058823529412) internal successors, (4053), 51 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:13,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:13,323 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:13,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 16:35:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:13,524 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:13,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1380621375, now seen corresponding path program 23 times [2023-11-17 16:35:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676476046] [2023-11-17 16:35:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676476046] [2023-11-17 16:35:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676476046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633498793] [2023-11-17 16:35:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:35:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:14,192 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:14,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:35:14,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:35:14,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:14,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 16:35:14,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:14,514 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 23 treesize of output 1 [2023-11-17 16:35:14,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:14,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:14,913 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:14,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:35:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:14,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:15,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:15,619 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 61 treesize of output 49 [2023-11-17 16:35:15,631 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:35:15,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 279 [2023-11-17 16:35:15,640 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:35:15,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-11-17 16:35:15,652 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-17 16:35:15,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 67 [2023-11-17 16:35:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633498793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:15,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:15,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 51 [2023-11-17 16:35:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358576968] [2023-11-17 16:35:15,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:15,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-17 16:35:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-17 16:35:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2379, Unknown=2, NotChecked=0, Total=2756 [2023-11-17 16:35:15,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 240 [2023-11-17 16:35:15,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 439 transitions, 8419 flow. Second operand has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:15,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:15,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 240 [2023-11-17 16:35:15,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:19,615 INFO L124 PetriNetUnfolderBase]: 5582/10454 cut-off events. [2023-11-17 16:35:19,616 INFO L125 PetriNetUnfolderBase]: For 76158/76158 co-relation queries the response was YES. [2023-11-17 16:35:19,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47620 conditions, 10454 events. 5582/10454 cut-off events. For 76158/76158 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 85069 event pairs, 1909 based on Foata normal form. 2/10456 useless extension candidates. Maximal degree in co-relation 47528. Up to 8394 conditions per place. [2023-11-17 16:35:19,693 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 421 selfloop transitions, 67 changer transitions 68/558 dead transitions. [2023-11-17 16:35:19,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 558 transitions, 10053 flow [2023-11-17 16:35:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:35:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:35:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2056 transitions. [2023-11-17 16:35:19,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3172839506172839 [2023-11-17 16:35:19,695 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2056 transitions. [2023-11-17 16:35:19,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2056 transitions. [2023-11-17 16:35:19,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:19,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2056 transitions. [2023-11-17 16:35:19,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 76.14814814814815) internal successors, (2056), 27 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:19,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 240.0) internal successors, (6720), 28 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:19,700 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 240.0) internal successors, (6720), 28 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:19,700 INFO L175 Difference]: Start difference. First operand has 281 places, 439 transitions, 8419 flow. Second operand 27 states and 2056 transitions. [2023-11-17 16:35:19,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 558 transitions, 10053 flow [2023-11-17 16:35:20,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 558 transitions, 9864 flow, removed 19 selfloop flow, removed 22 redundant places. [2023-11-17 16:35:20,124 INFO L231 Difference]: Finished difference. Result has 277 places, 425 transitions, 8181 flow [2023-11-17 16:35:20,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8181, PETRI_PLACES=277, PETRI_TRANSITIONS=425} [2023-11-17 16:35:20,125 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2023-11-17 16:35:20,125 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 425 transitions, 8181 flow [2023-11-17 16:35:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 71.41509433962264) internal successors, (3785), 53 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:20,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:20,125 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:20,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:20,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:20,326 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:20,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1030255991, now seen corresponding path program 24 times [2023-11-17 16:35:20,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:20,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255667100] [2023-11-17 16:35:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255667100] [2023-11-17 16:35:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255667100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120821067] [2023-11-17 16:35:20,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:35:20,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:20,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:20,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:35:21,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:35:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:21,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 16:35:21,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:21,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:35:21,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:21,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:35:21,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:22,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:22,363 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 61 treesize of output 49 [2023-11-17 16:35:22,373 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:35:22,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 132 [2023-11-17 16:35:22,380 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-17 16:35:22,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 101 [2023-11-17 16:35:22,388 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-17 16:35:22,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2023-11-17 16:35:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:35:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120821067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:22,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:22,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2023-11-17 16:35:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965468347] [2023-11-17 16:35:22,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:35:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:35:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1680, Unknown=3, NotChecked=0, Total=1980 [2023-11-17 16:35:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 240 [2023-11-17 16:35:22,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 425 transitions, 8181 flow. Second operand has 45 states, 45 states have (on average 71.57777777777778) internal successors, (3221), 45 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:22,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:22,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 240 [2023-11-17 16:35:22,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:26,333 INFO L124 PetriNetUnfolderBase]: 5493/10284 cut-off events. [2023-11-17 16:35:26,334 INFO L125 PetriNetUnfolderBase]: For 74171/74171 co-relation queries the response was YES. [2023-11-17 16:35:26,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46829 conditions, 10284 events. 5493/10284 cut-off events. For 74171/74171 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 83419 event pairs, 1890 based on Foata normal form. 2/10286 useless extension candidates. Maximal degree in co-relation 46741. Up to 8394 conditions per place. [2023-11-17 16:35:26,414 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 429 selfloop transitions, 63 changer transitions 68/562 dead transitions. [2023-11-17 16:35:26,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 562 transitions, 9900 flow [2023-11-17 16:35:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:35:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:35:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2214 transitions. [2023-11-17 16:35:26,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31810344827586207 [2023-11-17 16:35:26,416 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2214 transitions. [2023-11-17 16:35:26,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2214 transitions. [2023-11-17 16:35:26,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:26,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2214 transitions. [2023-11-17 16:35:26,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.34482758620689) internal successors, (2214), 29 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:26,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:26,421 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 240.0) internal successors, (7200), 30 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:26,421 INFO L175 Difference]: Start difference. First operand has 277 places, 425 transitions, 8181 flow. Second operand 29 states and 2214 transitions. [2023-11-17 16:35:26,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 562 transitions, 9900 flow [2023-11-17 16:35:26,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 562 transitions, 9746 flow, removed 9 selfloop flow, removed 25 redundant places. [2023-11-17 16:35:26,947 INFO L231 Difference]: Finished difference. Result has 274 places, 420 transitions, 8139 flow [2023-11-17 16:35:26,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8139, PETRI_PLACES=274, PETRI_TRANSITIONS=420} [2023-11-17 16:35:26,948 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-11-17 16:35:26,948 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 420 transitions, 8139 flow [2023-11-17 16:35:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 71.57777777777778) internal successors, (3221), 45 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:26,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:26,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 16:35:27,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:35:27,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:27,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1282735913, now seen corresponding path program 25 times [2023-11-17 16:35:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:27,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501651154] [2023-11-17 16:35:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501651154] [2023-11-17 16:35:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501651154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724533648] [2023-11-17 16:35:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:35:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:27,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:27,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:35:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:28,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:35:28,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:28,542 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:28,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:35:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:28,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:28,605 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:28,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 16:35:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:29,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724533648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:29,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:29,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-11-17 16:35:29,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264528590] [2023-11-17 16:35:29,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:29,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-17 16:35:29,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-17 16:35:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-11-17 16:35:29,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:35:29,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 420 transitions, 8139 flow. Second operand has 51 states, 51 states have (on average 79.47058823529412) internal successors, (4053), 51 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:29,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:29,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:35:29,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:33,419 INFO L124 PetriNetUnfolderBase]: 6239/11616 cut-off events. [2023-11-17 16:35:33,419 INFO L125 PetriNetUnfolderBase]: For 102947/102949 co-relation queries the response was YES. [2023-11-17 16:35:33,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53298 conditions, 11616 events. 6239/11616 cut-off events. For 102947/102949 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 94934 event pairs, 427 based on Foata normal form. 19/11635 useless extension candidates. Maximal degree in co-relation 53213. Up to 2733 conditions per place. [2023-11-17 16:35:33,512 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 214 selfloop transitions, 401 changer transitions 108/725 dead transitions. [2023-11-17 16:35:33,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 725 transitions, 12299 flow [2023-11-17 16:35:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:35:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:35:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3904 transitions. [2023-11-17 16:35:33,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3536231884057971 [2023-11-17 16:35:33,515 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3904 transitions. [2023-11-17 16:35:33,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3904 transitions. [2023-11-17 16:35:33,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:33,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3904 transitions. [2023-11-17 16:35:33,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 84.8695652173913) internal successors, (3904), 46 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:33,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:33,522 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:33,522 INFO L175 Difference]: Start difference. First operand has 274 places, 420 transitions, 8139 flow. Second operand 46 states and 3904 transitions. [2023-11-17 16:35:33,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 725 transitions, 12299 flow [2023-11-17 16:35:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 725 transitions, 12101 flow, removed 46 selfloop flow, removed 22 redundant places. [2023-11-17 16:35:33,894 INFO L231 Difference]: Finished difference. Result has 300 places, 470 transitions, 10011 flow [2023-11-17 16:35:33,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=7990, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=10011, PETRI_PLACES=300, PETRI_TRANSITIONS=470} [2023-11-17 16:35:33,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-11-17 16:35:33,895 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 470 transitions, 10011 flow [2023-11-17 16:35:33,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 79.47058823529412) internal successors, (4053), 51 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:33,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:33,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:33,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:34,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:35:34,102 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:34,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1432202213, now seen corresponding path program 26 times [2023-11-17 16:35:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:34,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244671185] [2023-11-17 16:35:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:34,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:34,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244671185] [2023-11-17 16:35:34,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244671185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:34,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932466776] [2023-11-17 16:35:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:34,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:34,875 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:34,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:35:35,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:35,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:35,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:35:35,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:35,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:35:35,387 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 20 treesize of output 15 [2023-11-17 16:35:35,669 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:35,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-17 16:35:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:35,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:35,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:35,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-11-17 16:35:35,908 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 10 treesize of output 3 [2023-11-17 16:35:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:36,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932466776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:36,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:36,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-11-17 16:35:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065563637] [2023-11-17 16:35:36,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-17 16:35:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-17 16:35:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2545, Unknown=0, NotChecked=0, Total=2862 [2023-11-17 16:35:36,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:35:36,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 470 transitions, 10011 flow. Second operand has 54 states, 54 states have (on average 74.38888888888889) internal successors, (4017), 54 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:36,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:35:36,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:39,904 INFO L124 PetriNetUnfolderBase]: 5787/10654 cut-off events. [2023-11-17 16:35:39,904 INFO L125 PetriNetUnfolderBase]: For 99970/99974 co-relation queries the response was YES. [2023-11-17 16:35:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52971 conditions, 10654 events. 5787/10654 cut-off events. For 99970/99974 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 85105 event pairs, 2199 based on Foata normal form. 1/10653 useless extension candidates. Maximal degree in co-relation 52878. Up to 9982 conditions per place. [2023-11-17 16:35:39,984 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 435 selfloop transitions, 21 changer transitions 62/520 dead transitions. [2023-11-17 16:35:39,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 520 transitions, 11176 flow [2023-11-17 16:35:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:35:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:35:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1546 transitions. [2023-11-17 16:35:39,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32208333333333333 [2023-11-17 16:35:39,986 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1546 transitions. [2023-11-17 16:35:39,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1546 transitions. [2023-11-17 16:35:39,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:39,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1546 transitions. [2023-11-17 16:35:39,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 77.3) internal successors, (1546), 20 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 240.0) internal successors, (5040), 21 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,989 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 240.0) internal successors, (5040), 21 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,989 INFO L175 Difference]: Start difference. First operand has 300 places, 470 transitions, 10011 flow. Second operand 20 states and 1546 transitions. [2023-11-17 16:35:39,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 520 transitions, 11176 flow [2023-11-17 16:35:40,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 520 transitions, 9816 flow, removed 300 selfloop flow, removed 33 redundant places. [2023-11-17 16:35:40,718 INFO L231 Difference]: Finished difference. Result has 262 places, 454 transitions, 8475 flow [2023-11-17 16:35:40,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8475, PETRI_PLACES=262, PETRI_TRANSITIONS=454} [2023-11-17 16:35:40,719 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-11-17 16:35:40,719 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 454 transitions, 8475 flow [2023-11-17 16:35:40,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 74.38888888888889) internal successors, (4017), 54 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:40,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:40,720 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:40,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 16:35:40,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:35:40,922 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:40,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash 66410332, now seen corresponding path program 27 times [2023-11-17 16:35:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692707508] [2023-11-17 16:35:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:40,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:41,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692707508] [2023-11-17 16:35:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692707508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:41,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333455549] [2023-11-17 16:35:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:41,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:41,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:41,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:35:41,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:35:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:41,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 16:35:41,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:42,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:42,790 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:35:42,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-17 16:35:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:43,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333455549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:43,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:43,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2023-11-17 16:35:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905937185] [2023-11-17 16:35:43,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:43,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-17 16:35:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-17 16:35:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2220, Unknown=0, NotChecked=0, Total=2756 [2023-11-17 16:35:43,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 240 [2023-11-17 16:35:43,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 454 transitions, 8475 flow. Second operand has 53 states, 53 states have (on average 79.45283018867924) internal successors, (4211), 53 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:43,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:43,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 240 [2023-11-17 16:35:43,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:45,880 INFO L124 PetriNetUnfolderBase]: 77478/141688 cut-off events. [2023-11-17 16:38:45,880 INFO L125 PetriNetUnfolderBase]: For 2132618/2132624 co-relation queries the response was YES. [2023-11-17 16:38:48,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696040 conditions, 141688 events. 77478/141688 cut-off events. For 2132618/2132624 co-relation queries the response was YES. Maximal size of possible extension queue 7066. Compared 1568411 event pairs, 981 based on Foata normal form. 756/142444 useless extension candidates. Maximal degree in co-relation 695954. Up to 34487 conditions per place. [2023-11-17 16:38:48,864 INFO L140 encePairwiseOnDemand]: 233/240 looper letters, 5880 selfloop transitions, 6549 changer transitions 1666/14097 dead transitions. [2023-11-17 16:38:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1374 places, 14097 transitions, 213843 flow [2023-11-17 16:38:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1142 states. [2023-11-17 16:38:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1142 states. [2023-11-17 16:38:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 99197 transitions. [2023-11-17 16:38:48,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36192717454757733 [2023-11-17 16:38:48,943 INFO L72 ComplementDD]: Start complementDD. Operand 1142 states and 99197 transitions. [2023-11-17 16:38:48,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1142 states and 99197 transitions. [2023-11-17 16:38:48,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:48,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1142 states and 99197 transitions. [2023-11-17 16:38:49,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1143 states, 1142 states have (on average 86.86252189141857) internal successors, (99197), 1142 states have internal predecessors, (99197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:49,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1143 states, 1143 states have (on average 240.0) internal successors, (274320), 1143 states have internal predecessors, (274320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:49,294 INFO L81 ComplementDD]: Finished complementDD. Result has 1143 states, 1143 states have (on average 240.0) internal successors, (274320), 1143 states have internal predecessors, (274320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:49,295 INFO L175 Difference]: Start difference. First operand has 262 places, 454 transitions, 8475 flow. Second operand 1142 states and 99197 transitions. [2023-11-17 16:38:49,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1374 places, 14097 transitions, 213843 flow [2023-11-17 16:39:06,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1361 places, 14097 transitions, 209702 flow, removed 2009 selfloop flow, removed 13 redundant places. [2023-11-17 16:39:06,736 INFO L231 Difference]: Finished difference. Result has 1906 places, 6800 transitions, 150435 flow [2023-11-17 16:39:06,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1142, PETRI_FLOW=150435, PETRI_PLACES=1906, PETRI_TRANSITIONS=6800} [2023-11-17 16:39:06,738 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1885 predicate places. [2023-11-17 16:39:06,739 INFO L495 AbstractCegarLoop]: Abstraction has has 1906 places, 6800 transitions, 150435 flow [2023-11-17 16:39:06,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 79.45283018867924) internal successors, (4211), 53 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:06,739 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:06,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:39:06,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:06,946 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:39:06,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1985876058, now seen corresponding path program 28 times [2023-11-17 16:39:06,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:06,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365110954] [2023-11-17 16:39:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:06,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:07,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365110954] [2023-11-17 16:39:07,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365110954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427691770] [2023-11-17 16:39:07,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:39:07,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:07,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:07,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:39:07,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:39:08,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:39:08,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:08,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:39:08,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:08,064 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 16:39:08,358 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 21 treesize of output 16 [2023-11-17 16:39:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:08,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:08,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:08,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2023-11-17 16:39:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 16:39:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427691770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:08,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:08,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 36 [2023-11-17 16:39:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691188088] [2023-11-17 16:39:08,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:08,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:39:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:39:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 16:39:08,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-11-17 16:39:08,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1906 places, 6800 transitions, 150435 flow. Second operand has 38 states, 38 states have (on average 74.42105263157895) internal successors, (2828), 38 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-11-17 16:39:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 16:40:01,695 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:40:01,696 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:40:02,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:02,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:04,616 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:40:04,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-17 16:40:04,617 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-11-17 16:40:04,618 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:40:04,618 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:40:04,618 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1] [2023-11-17 16:40:04,621 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:40:04,622 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:40:04,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:40:04 BasicIcfg [2023-11-17 16:40:04,709 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:40:04,710 INFO L158 Benchmark]: Toolchain (without parser) took 469818.65ms. Allocated memory was 174.1MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 127.4MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2023-11-17 16:40:04,710 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 174.1MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:40:04,710 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.39ms. Allocated memory is still 174.1MB. Free memory was 127.4MB in the beginning and 115.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:40:04,710 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.10ms. Allocated memory is still 174.1MB. Free memory was 115.8MB in the beginning and 113.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:40:04,710 INFO L158 Benchmark]: Boogie Preprocessor took 52.11ms. Allocated memory is still 174.1MB. Free memory was 113.8MB in the beginning and 112.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:40:04,711 INFO L158 Benchmark]: RCFGBuilder took 567.47ms. Allocated memory is still 174.1MB. Free memory was 112.4MB in the beginning and 90.7MB in the end (delta: 21.7MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 16:40:04,711 INFO L158 Benchmark]: TraceAbstraction took 468929.60ms. Allocated memory was 174.1MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 90.0MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2023-11-17 16:40:04,712 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 174.1MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.39ms. Allocated memory is still 174.1MB. Free memory was 127.4MB in the beginning and 115.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 57.10ms. Allocated memory is still 174.1MB. Free memory was 115.8MB in the beginning and 113.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.11ms. Allocated memory is still 174.1MB. Free memory was 113.8MB in the beginning and 112.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 567.47ms. Allocated memory is still 174.1MB. Free memory was 112.4MB in the beginning and 90.7MB in the end (delta: 21.7MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 468929.60ms. Allocated memory was 174.1MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 90.0MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 111 PlacesBefore, 21 PlacesAfterwards, 113 TransitionsBefore, 17 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 72 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 7 ConcurrentYvCompositions, 6 ChoiceCompositions, 116 TotalNumberOfCompositions, 507 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 499, independent: 495, independent conditional: 0, independent unconditional: 495, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 361, independent: 360, independent conditional: 0, independent unconditional: 360, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 361, independent: 360, independent conditional: 0, independent unconditional: 360, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 499, independent: 135, independent conditional: 0, independent unconditional: 135, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 361, unknown conditional: 0, unknown unconditional: 361] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 468.7s, OverallIterations: 31, TraceHistogramMax: 6, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 419.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 12359 SdHoareTripleChecker+Valid, 36.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12359 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 31.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1223 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 63573 IncrementalHoareTripleChecker+Invalid, 64797 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1223 mSolverCounterUnsat, 0 mSDtfsCounter, 63573 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3700 GetRequests, 835 SyntacticMatches, 4 SemanticMatches, 2861 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701068 ImplicationChecksByTransitivity, 184.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150435occurred in iteration=30, InterpolantAutomatonStates: 2145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 35.2s InterpolantComputationTime, 1423 NumberOfCodeBlocks, 1423 NumberOfCodeBlocksAsserted, 98 NumberOfCheckSat, 2025 ConstructedInterpolants, 137 QuantifiedInterpolants, 28668 SizeOfPredicates, 259 NumberOfNonLiveVariables, 6035 ConjunctsInSsa, 758 ConjunctsInUnsatCore, 87 InterpolantComputations, 3 PerfectInterpolantSequences, 466/2256 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown