/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-bad-dot-product.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:08:53,514 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:08:53,576 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 16:08:53,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:08:53,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:08:53,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:08:53,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:08:53,601 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:08:53,601 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:08:53,604 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:08:53,604 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:08:53,605 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:08:53,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:08:53,606 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:08:53,607 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:08:53,607 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:08:53,607 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:08:53,607 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:08:53,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:08:53,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:53,608 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:08:53,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:08:53,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:08:53,609 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:08:53,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:08:53,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:08:53,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:08:53,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:08:53,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:08:53,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:08:53,793 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:08:53,794 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:08:53,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-11-17 16:08:54,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:08:54,840 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:08:54,841 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-11-17 16:08:54,847 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7328448d1/49d47c7c03104af6b7aeb9c97fe0d54a/FLAGf9bdb643f [2023-11-17 16:08:54,868 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7328448d1/49d47c7c03104af6b7aeb9c97fe0d54a [2023-11-17 16:08:54,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:08:54,871 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:08:54,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:54,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:08:54,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:08:54,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:54" (1/1) ... [2023-11-17 16:08:54,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a003fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:54, skipping insertion in model container [2023-11-17 16:08:54,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:54" (1/1) ... [2023-11-17 16:08:54,898 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:08:55,003 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-bad-dot-product.wvr.c[2904,2917] [2023-11-17 16:08:55,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:55,021 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:08:55,044 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-bad-dot-product.wvr.c[2904,2917] [2023-11-17 16:08:55,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:55,052 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:55,052 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:55,057 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:08:55,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55 WrapperNode [2023-11-17 16:08:55,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:55,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:55,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:08:55,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:08:55,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,088 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 290 [2023-11-17 16:08:55,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:55,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:08:55,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:08:55,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:08:55,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:08:55,120 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:08:55,120 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:08:55,120 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:08:55,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (1/1) ... [2023-11-17 16:08:55,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:55,149 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 16:08:55,158 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 16:08:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:08:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:08:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:08:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:08:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:08:55,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:08:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:08:55,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:08:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:08:55,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:08:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:08:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:08:55,176 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 16:08:55,257 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:08:55,260 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:08:55,638 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:08:55,786 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:08:55,786 INFO L307 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-17 16:08:55,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:55 BoogieIcfgContainer [2023-11-17 16:08:55,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:08:55,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:08:55,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:08:55,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:08:55,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:08:54" (1/3) ... [2023-11-17 16:08:55,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:55, skipping insertion in model container [2023-11-17 16:08:55,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:55" (2/3) ... [2023-11-17 16:08:55,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:55, skipping insertion in model container [2023-11-17 16:08:55,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:55" (3/3) ... [2023-11-17 16:08:55,792 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-11-17 16:08:55,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:08:55,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:08:55,804 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:08:55,871 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:08:55,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 269 transitions, 559 flow [2023-11-17 16:08:55,958 INFO L124 PetriNetUnfolderBase]: 25/266 cut-off events. [2023-11-17 16:08:55,958 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:08:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 266 events. 25/266 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 366 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 205. Up to 2 conditions per place. [2023-11-17 16:08:55,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 269 transitions, 559 flow [2023-11-17 16:08:55,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 255 transitions, 528 flow [2023-11-17 16:08:55,973 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:08:55,984 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 240 places, 255 transitions, 528 flow [2023-11-17 16:08:55,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 240 places, 255 transitions, 528 flow [2023-11-17 16:08:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 255 transitions, 528 flow [2023-11-17 16:08:56,033 INFO L124 PetriNetUnfolderBase]: 25/255 cut-off events. [2023-11-17 16:08:56,033 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:08:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 255 events. 25/255 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 364 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 205. Up to 2 conditions per place. [2023-11-17 16:08:56,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 8910 [2023-11-17 16:09:01,527 INFO L134 LiptonReduction]: Checked pairs total: 9089 [2023-11-17 16:09:01,527 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-11-17 16:09:01,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:09:01,541 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;@7ea0adb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:09:01,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:09:01,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:09:01,546 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-11-17 16:09:01,546 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:09:01,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:01,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:01,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1253554356, now seen corresponding path program 1 times [2023-11-17 16:09:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:01,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441891372] [2023-11-17 16:09:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:01,819 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 16:09:01,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:01,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441891372] [2023-11-17 16:09:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441891372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:01,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:01,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:09:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544624757] [2023-11-17 16:09:01,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:09:01,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:09:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:09:01,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 537 [2023-11-17 16:09:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 537 [2023-11-17 16:09:01,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:02,089 INFO L124 PetriNetUnfolderBase]: 1732/2348 cut-off events. [2023-11-17 16:09:02,089 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-17 16:09:02,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 2348 events. 1732/2348 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8446 event pairs, 527 based on Foata normal form. 1/1659 useless extension candidates. Maximal degree in co-relation 4170. Up to 1336 conditions per place. [2023-11-17 16:09:02,102 INFO L140 encePairwiseOnDemand]: 532/537 looper letters, 56 selfloop transitions, 4 changer transitions 1/61 dead transitions. [2023-11-17 16:09:02,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 61 transitions, 277 flow [2023-11-17 16:09:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:09:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:09:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-11-17 16:09:02,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835505896958411 [2023-11-17 16:09:02,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-11-17 16:09:02,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-11-17 16:09:02,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:02,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-11-17 16:09:02,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,137 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 3 states and 779 transitions. [2023-11-17 16:09:02,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 61 transitions, 277 flow [2023-11-17 16:09:02,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 61 transitions, 255 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:09:02,144 INFO L231 Difference]: Finished difference. Result has 33 places, 37 transitions, 100 flow [2023-11-17 16:09:02,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2023-11-17 16:09:02,148 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-11-17 16:09:02,148 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 100 flow [2023-11-17 16:09:02,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:02,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:02,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:09:02,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:02,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash 115255146, now seen corresponding path program 1 times [2023-11-17 16:09:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:02,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656928000] [2023-11-17 16:09:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656928000] [2023-11-17 16:09:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656928000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:09:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850811699] [2023-11-17 16:09:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:02,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:09:02,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:09:02,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:09:02,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 537 [2023-11-17 16:09:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:02,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 537 [2023-11-17 16:09:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:02,500 INFO L124 PetriNetUnfolderBase]: 1733/2352 cut-off events. [2023-11-17 16:09:02,500 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-11-17 16:09:02,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5285 conditions, 2352 events. 1733/2352 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8372 event pairs, 1054 based on Foata normal form. 0/1785 useless extension candidates. Maximal degree in co-relation 2063. Up to 2349 conditions per place. [2023-11-17 16:09:02,509 INFO L140 encePairwiseOnDemand]: 532/537 looper letters, 36 selfloop transitions, 2 changer transitions 3/41 dead transitions. [2023-11-17 16:09:02,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 190 flow [2023-11-17 16:09:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:09:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:09:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1080 transitions. [2023-11-17 16:09:02,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022346368715084 [2023-11-17 16:09:02,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1080 transitions. [2023-11-17 16:09:02,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1080 transitions. [2023-11-17 16:09:02,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:02,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1080 transitions. [2023-11-17 16:09:02,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,519 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,519 INFO L175 Difference]: Start difference. First operand has 33 places, 37 transitions, 100 flow. Second operand 5 states and 1080 transitions. [2023-11-17 16:09:02,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 190 flow [2023-11-17 16:09:02,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:09:02,521 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 114 flow [2023-11-17 16:09:02,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-17 16:09:02,522 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-17 16:09:02,523 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 114 flow [2023-11-17 16:09:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:02,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:09:02,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:02,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1156222804, now seen corresponding path program 1 times [2023-11-17 16:09:02,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:02,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745811084] [2023-11-17 16:09:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:02,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745811084] [2023-11-17 16:09:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745811084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321299342] [2023-11-17 16:09:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:02,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:02,676 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 16:09:02,697 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 16:09:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:02,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:09:02,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:02,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321299342] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:02,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:09:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 16:09:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208945733] [2023-11-17 16:09:02,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:02,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:09:02,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:09:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:09:02,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 537 [2023-11-17 16:09:02,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:02,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 537 [2023-11-17 16:09:02,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:03,085 INFO L124 PetriNetUnfolderBase]: 2005/2720 cut-off events. [2023-11-17 16:09:03,085 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2023-11-17 16:09:03,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5910 conditions, 2720 events. 2005/2720 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10433 event pairs, 646 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 5895. Up to 1370 conditions per place. [2023-11-17 16:09:03,095 INFO L140 encePairwiseOnDemand]: 531/537 looper letters, 52 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-11-17 16:09:03,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 276 flow [2023-11-17 16:09:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:09:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:09:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1063 transitions. [2023-11-17 16:09:03,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395903165735568 [2023-11-17 16:09:03,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1063 transitions. [2023-11-17 16:09:03,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1063 transitions. [2023-11-17 16:09:03,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:03,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1063 transitions. [2023-11-17 16:09:03,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.6) internal successors, (1063), 5 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,104 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,104 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 114 flow. Second operand 5 states and 1063 transitions. [2023-11-17 16:09:03,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 276 flow [2023-11-17 16:09:03,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 266 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 16:09:03,107 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 127 flow [2023-11-17 16:09:03,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-17 16:09:03,108 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-17 16:09:03,108 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 127 flow [2023-11-17 16:09:03,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:03,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:03,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:09:03,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:03,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:03,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1567039113, now seen corresponding path program 1 times [2023-11-17 16:09:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712428471] [2023-11-17 16:09:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:03,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712428471] [2023-11-17 16:09:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712428471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:03,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:03,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:09:03,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550010310] [2023-11-17 16:09:03,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:03,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:09:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:09:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:09:03,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 537 [2023-11-17 16:09:03,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:03,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 537 [2023-11-17 16:09:03,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:03,592 INFO L124 PetriNetUnfolderBase]: 2387/3242 cut-off events. [2023-11-17 16:09:03,592 INFO L125 PetriNetUnfolderBase]: For 1451/1451 co-relation queries the response was YES. [2023-11-17 16:09:03,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7967 conditions, 3242 events. 2387/3242 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12321 event pairs, 957 based on Foata normal form. 0/2768 useless extension candidates. Maximal degree in co-relation 7946. Up to 1895 conditions per place. [2023-11-17 16:09:03,604 INFO L140 encePairwiseOnDemand]: 532/537 looper letters, 56 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-17 16:09:03,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 315 flow [2023-11-17 16:09:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:09:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:09:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 949 transitions. [2023-11-17 16:09:03,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44180633147113596 [2023-11-17 16:09:03,606 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 949 transitions. [2023-11-17 16:09:03,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 949 transitions. [2023-11-17 16:09:03,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:03,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 949 transitions. [2023-11-17 16:09:03,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.25) internal successors, (949), 4 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,612 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 127 flow. Second operand 4 states and 949 transitions. [2023-11-17 16:09:03,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 315 flow [2023-11-17 16:09:03,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:09:03,617 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 142 flow [2023-11-17 16:09:03,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-17 16:09:03,619 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-11-17 16:09:03,619 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 142 flow [2023-11-17 16:09:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:03,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:03,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:09:03,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:03,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1139899387, now seen corresponding path program 1 times [2023-11-17 16:09:03,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:03,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763631397] [2023-11-17 16:09:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:03,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763631397] [2023-11-17 16:09:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763631397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:03,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:03,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:09:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876666038] [2023-11-17 16:09:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:09:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:09:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:09:03,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 537 [2023-11-17 16:09:03,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:03,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 537 [2023-11-17 16:09:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:04,125 INFO L124 PetriNetUnfolderBase]: 4598/6294 cut-off events. [2023-11-17 16:09:04,125 INFO L125 PetriNetUnfolderBase]: For 3644/3644 co-relation queries the response was YES. [2023-11-17 16:09:04,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17168 conditions, 6294 events. 4598/6294 cut-off events. For 3644/3644 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26792 event pairs, 2786 based on Foata normal form. 140/5777 useless extension candidates. Maximal degree in co-relation 17146. Up to 3243 conditions per place. [2023-11-17 16:09:04,153 INFO L140 encePairwiseOnDemand]: 531/537 looper letters, 88 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2023-11-17 16:09:04,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 94 transitions, 509 flow [2023-11-17 16:09:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:09:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:09:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 992 transitions. [2023-11-17 16:09:04,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36945996275605214 [2023-11-17 16:09:04,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 992 transitions. [2023-11-17 16:09:04,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 992 transitions. [2023-11-17 16:09:04,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:04,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 992 transitions. [2023-11-17 16:09:04,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 198.4) internal successors, (992), 5 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,161 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 142 flow. Second operand 5 states and 992 transitions. [2023-11-17 16:09:04,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 94 transitions, 509 flow [2023-11-17 16:09:04,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 94 transitions, 501 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:09:04,169 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 194 flow [2023-11-17 16:09:04,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-17 16:09:04,169 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2023-11-17 16:09:04,170 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 194 flow [2023-11-17 16:09:04,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:04,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:04,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:09:04,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:04,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1220871937, now seen corresponding path program 1 times [2023-11-17 16:09:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:04,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19899964] [2023-11-17 16:09:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19899964] [2023-11-17 16:09:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19899964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041328040] [2023-11-17 16:09:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:04,289 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 16:09:04,321 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 16:09:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:04,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:09:04,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:04,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:04,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 16:09:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041328040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:04,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:04,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:09:04,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960059408] [2023-11-17 16:09:04,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:04,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:09:04,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:09:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:09:04,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 537 [2023-11-17 16:09:04,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 185.16666666666666) internal successors, (2222), 12 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:04,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 537 [2023-11-17 16:09:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:05,185 INFO L124 PetriNetUnfolderBase]: 6809/9346 cut-off events. [2023-11-17 16:09:05,185 INFO L125 PetriNetUnfolderBase]: For 6349/6349 co-relation queries the response was YES. [2023-11-17 16:09:05,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26467 conditions, 9346 events. 6809/9346 cut-off events. For 6349/6349 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 42466 event pairs, 4027 based on Foata normal form. 140/8502 useless extension candidates. Maximal degree in co-relation 26441. Up to 4778 conditions per place. [2023-11-17 16:09:05,222 INFO L140 encePairwiseOnDemand]: 531/537 looper letters, 88 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2023-11-17 16:09:05,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 99 transitions, 577 flow [2023-11-17 16:09:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:09:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:09:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1176 transitions. [2023-11-17 16:09:05,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3649906890130354 [2023-11-17 16:09:05,225 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1176 transitions. [2023-11-17 16:09:05,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1176 transitions. [2023-11-17 16:09:05,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:05,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1176 transitions. [2023-11-17 16:09:05,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,231 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,231 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 194 flow. Second operand 6 states and 1176 transitions. [2023-11-17 16:09:05,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 99 transitions, 577 flow [2023-11-17 16:09:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 99 transitions, 573 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:09:05,243 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 273 flow [2023-11-17 16:09:05,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-17 16:09:05,244 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-11-17 16:09:05,244 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 273 flow [2023-11-17 16:09:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.16666666666666) internal successors, (2222), 12 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:05,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:05,252 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 16:09:05,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:09:05,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:05,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -892660617, now seen corresponding path program 1 times [2023-11-17 16:09:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:05,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103139852] [2023-11-17 16:09:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:05,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103139852] [2023-11-17 16:09:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103139852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:05,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:05,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:09:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379776797] [2023-11-17 16:09:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:05,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:09:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:09:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:09:05,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 537 [2023-11-17 16:09:05,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:05,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 537 [2023-11-17 16:09:05,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:06,210 INFO L124 PetriNetUnfolderBase]: 7118/9772 cut-off events. [2023-11-17 16:09:06,211 INFO L125 PetriNetUnfolderBase]: For 10921/10921 co-relation queries the response was YES. [2023-11-17 16:09:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30215 conditions, 9772 events. 7118/9772 cut-off events. For 10921/10921 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 45006 event pairs, 4545 based on Foata normal form. 123/8863 useless extension candidates. Maximal degree in co-relation 30185. Up to 6292 conditions per place. [2023-11-17 16:09:06,249 INFO L140 encePairwiseOnDemand]: 529/537 looper letters, 89 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-11-17 16:09:06,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 641 flow [2023-11-17 16:09:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:09:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:09:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1119 transitions. [2023-11-17 16:09:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472998137802607 [2023-11-17 16:09:06,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1119 transitions. [2023-11-17 16:09:06,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1119 transitions. [2023-11-17 16:09:06,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:06,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1119 transitions. [2023-11-17 16:09:06,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,257 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,257 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 273 flow. Second operand 6 states and 1119 transitions. [2023-11-17 16:09:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 641 flow [2023-11-17 16:09:06,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 97 transitions, 620 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-17 16:09:06,293 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 303 flow [2023-11-17 16:09:06,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-11-17 16:09:06,293 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-17 16:09:06,294 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 303 flow [2023-11-17 16:09:06,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:06,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:09:06,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:06,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 912595865, now seen corresponding path program 2 times [2023-11-17 16:09:06,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:06,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579496230] [2023-11-17 16:09:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:06,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579496230] [2023-11-17 16:09:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579496230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:09:06,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:09:06,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:09:06,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594744424] [2023-11-17 16:09:06,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:09:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:09:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:09:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:09:06,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 537 [2023-11-17 16:09:06,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 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 16:09:06,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:06,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 537 [2023-11-17 16:09:06,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:07,078 INFO L124 PetriNetUnfolderBase]: 6540/9010 cut-off events. [2023-11-17 16:09:07,078 INFO L125 PetriNetUnfolderBase]: For 12879/12879 co-relation queries the response was YES. [2023-11-17 16:09:07,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29101 conditions, 9010 events. 6540/9010 cut-off events. For 12879/12879 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 41267 event pairs, 4193 based on Foata normal form. 109/8135 useless extension candidates. Maximal degree in co-relation 29068. Up to 6292 conditions per place. [2023-11-17 16:09:07,115 INFO L140 encePairwiseOnDemand]: 530/537 looper letters, 86 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-11-17 16:09:07,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 643 flow [2023-11-17 16:09:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:09:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:09:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1098 transitions. [2023-11-17 16:09:07,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3407821229050279 [2023-11-17 16:09:07,117 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1098 transitions. [2023-11-17 16:09:07,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1098 transitions. [2023-11-17 16:09:07,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:07,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1098 transitions. [2023-11-17 16:09:07,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:07,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:07,123 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:07,123 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 303 flow. Second operand 6 states and 1098 transitions. [2023-11-17 16:09:07,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 643 flow [2023-11-17 16:09:07,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 636 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:09:07,154 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 327 flow [2023-11-17 16:09:07,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-17 16:09:07,154 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-11-17 16:09:07,154 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 327 flow [2023-11-17 16:09:07,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 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 16:09:07,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:07,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:09:07,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:07,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1592384765, now seen corresponding path program 1 times [2023-11-17 16:09:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286486962] [2023-11-17 16:09:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286486962] [2023-11-17 16:09:07,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286486962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672126859] [2023-11-17 16:09:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:07,322 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 16:09:07,327 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 16:09:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:07,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:09:07,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:07,532 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 16:09:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:07,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:07,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2023-11-17 16:09:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672126859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:07,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:07,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-17 16:09:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527676912] [2023-11-17 16:09:07,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:09:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:09:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2023-11-17 16:09:07,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 537 [2023-11-17 16:09:07,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 327 flow. Second operand has 17 states, 17 states have (on average 175.88235294117646) internal successors, (2990), 17 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:07,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:07,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 537 [2023-11-17 16:09:07,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:08,391 INFO L124 PetriNetUnfolderBase]: 6849/9436 cut-off events. [2023-11-17 16:09:08,391 INFO L125 PetriNetUnfolderBase]: For 17617/17617 co-relation queries the response was YES. [2023-11-17 16:09:08,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31915 conditions, 9436 events. 6849/9436 cut-off events. For 17617/17617 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43898 event pairs, 4127 based on Foata normal form. 123/8527 useless extension candidates. Maximal degree in co-relation 31881. Up to 5137 conditions per place. [2023-11-17 16:09:08,433 INFO L140 encePairwiseOnDemand]: 529/537 looper letters, 91 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2023-11-17 16:09:08,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 763 flow [2023-11-17 16:09:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:09:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:09:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2023-11-17 16:09:08,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442404894918861 [2023-11-17 16:09:08,437 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2023-11-17 16:09:08,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2023-11-17 16:09:08,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:08,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2023-11-17 16:09:08,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,443 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,443 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 327 flow. Second operand 7 states and 1294 transitions. [2023-11-17 16:09:08,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 763 flow [2023-11-17 16:09:08,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 751 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:09:08,476 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 397 flow [2023-11-17 16:09:08,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-17 16:09:08,477 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2023-11-17 16:09:08,477 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 397 flow [2023-11-17 16:09:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.88235294117646) internal successors, (2990), 17 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:08,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:08,483 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 16:09:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:08,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:08,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:08,684 INFO L85 PathProgramCache]: Analyzing trace with hash 212871717, now seen corresponding path program 2 times [2023-11-17 16:09:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:08,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755640881] [2023-11-17 16:09:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:08,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755640881] [2023-11-17 16:09:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755640881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846267896] [2023-11-17 16:09:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:08,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:08,937 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 16:09:08,956 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 16:09:09,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:09,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:09:09,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:09,148 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 16:09:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:09,179 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 16:09:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:09,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:09,220 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_263 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_263) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-11-17 16:09:09,231 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_263 (Array Int Int)) (v_ArrVal_262 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_263) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-11-17 16:09:09,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 135 [2023-11-17 16:09:09,242 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 27 treesize of output 21 [2023-11-17 16:09:09,246 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 16:09:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846267896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:09,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:09,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-11-17 16:09:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475834100] [2023-11-17 16:09:09,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:09:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:09:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=280, Unknown=2, NotChecked=70, Total=420 [2023-11-17 16:09:09,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 537 [2023-11-17 16:09:09,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 397 flow. Second operand has 21 states, 21 states have (on average 172.71428571428572) internal successors, (3627), 21 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:09,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:09,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 537 [2023-11-17 16:09:09,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:10,013 INFO L124 PetriNetUnfolderBase]: 6271/8674 cut-off events. [2023-11-17 16:09:10,014 INFO L125 PetriNetUnfolderBase]: For 22564/22564 co-relation queries the response was YES. [2023-11-17 16:09:10,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31220 conditions, 8674 events. 6271/8674 cut-off events. For 22564/22564 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39989 event pairs, 3775 based on Foata normal form. 109/7799 useless extension candidates. Maximal degree in co-relation 31184. Up to 3844 conditions per place. [2023-11-17 16:09:10,047 INFO L140 encePairwiseOnDemand]: 530/537 looper letters, 88 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2023-11-17 16:09:10,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 791 flow [2023-11-17 16:09:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:09:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:09:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1270 transitions. [2023-11-17 16:09:10,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3378558127161479 [2023-11-17 16:09:10,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1270 transitions. [2023-11-17 16:09:10,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1270 transitions. [2023-11-17 16:09:10,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:10,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1270 transitions. [2023-11-17 16:09:10,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 181.42857142857142) internal successors, (1270), 7 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 16:09:10,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,062 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 397 flow. Second operand 7 states and 1270 transitions. [2023-11-17 16:09:10,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 791 flow [2023-11-17 16:09:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 777 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 16:09:10,092 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 434 flow [2023-11-17 16:09:10,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-11-17 16:09:10,093 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-17 16:09:10,093 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 434 flow [2023-11-17 16:09:10,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 172.71428571428572) internal successors, (3627), 21 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:10,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:10,100 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 16:09:10,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:10,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:10,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash 521147789, now seen corresponding path program 2 times [2023-11-17 16:09:10,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:10,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601323093] [2023-11-17 16:09:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:10,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:10,547 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 16:09:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601323093] [2023-11-17 16:09:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601323093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838573818] [2023-11-17 16:09:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:10,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:10,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:10,548 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 16:09:10,564 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 16:09:10,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:10,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:09:10,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:10,805 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 16:09:10,878 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 16:09:10,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:10,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:10,962 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 59 treesize of output 51 [2023-11-17 16:09:10,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:10,969 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 29 treesize of output 25 [2023-11-17 16:09:11,101 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 16:09:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838573818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:11,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-17 16:09:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936163594] [2023-11-17 16:09:11,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:09:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:09:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:09:11,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 537 [2023-11-17 16:09:11,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 434 flow. Second operand has 30 states, 30 states have (on average 161.13333333333333) internal successors, (4834), 30 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:11,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 537 [2023-11-17 16:09:11,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:13,608 INFO L124 PetriNetUnfolderBase]: 20910/28821 cut-off events. [2023-11-17 16:09:13,608 INFO L125 PetriNetUnfolderBase]: For 89416/89416 co-relation queries the response was YES. [2023-11-17 16:09:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109396 conditions, 28821 events. 20910/28821 cut-off events. For 89416/89416 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 161637 event pairs, 7129 based on Foata normal form. 104/25693 useless extension candidates. Maximal degree in co-relation 75547. Up to 8682 conditions per place. [2023-11-17 16:09:13,735 INFO L140 encePairwiseOnDemand]: 522/537 looper letters, 291 selfloop transitions, 41 changer transitions 0/332 dead transitions. [2023-11-17 16:09:13,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 332 transitions, 2786 flow [2023-11-17 16:09:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:09:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:09:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2446 transitions. [2023-11-17 16:09:13,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32535248736366057 [2023-11-17 16:09:13,740 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2446 transitions. [2023-11-17 16:09:13,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2446 transitions. [2023-11-17 16:09:13,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:13,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2446 transitions. [2023-11-17 16:09:13,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.71428571428572) internal successors, (2446), 14 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,751 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,751 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 434 flow. Second operand 14 states and 2446 transitions. [2023-11-17 16:09:13,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 332 transitions, 2786 flow [2023-11-17 16:09:14,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 332 transitions, 2704 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-17 16:09:14,129 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 973 flow [2023-11-17 16:09:14,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=973, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2023-11-17 16:09:14,130 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2023-11-17 16:09:14,130 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 973 flow [2023-11-17 16:09:14,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 161.13333333333333) internal successors, (4834), 30 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:14,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:14,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:14,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 16:09:14,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:09:14,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:14,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1605668209, now seen corresponding path program 3 times [2023-11-17 16:09:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:14,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077037375] [2023-11-17 16:09:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:14,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077037375] [2023-11-17 16:09:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077037375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355107017] [2023-11-17 16:09:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:09:14,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:14,899 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 16:09:14,927 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 16:09:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:09:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:15,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 16:09:15,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:15,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:15,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:15,292 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 21 treesize of output 17 [2023-11-17 16:09:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:15,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355107017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:15,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:15,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2023-11-17 16:09:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206571700] [2023-11-17 16:09:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:09:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:09:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:09:15,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 537 [2023-11-17 16:09:15,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 973 flow. Second operand has 30 states, 30 states have (on average 146.3) internal successors, (4389), 30 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:15,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 537 [2023-11-17 16:09:15,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:21,885 INFO L124 PetriNetUnfolderBase]: 37129/50349 cut-off events. [2023-11-17 16:09:21,885 INFO L125 PetriNetUnfolderBase]: For 207513/207513 co-relation queries the response was YES. [2023-11-17 16:09:22,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208824 conditions, 50349 events. 37129/50349 cut-off events. For 207513/207513 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 287767 event pairs, 8469 based on Foata normal form. 70/45079 useless extension candidates. Maximal degree in co-relation 171464. Up to 8682 conditions per place. [2023-11-17 16:09:22,252 INFO L140 encePairwiseOnDemand]: 520/537 looper letters, 850 selfloop transitions, 306 changer transitions 0/1156 dead transitions. [2023-11-17 16:09:22,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1156 transitions, 10067 flow [2023-11-17 16:09:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-17 16:09:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-17 16:09:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 10302 transitions. [2023-11-17 16:09:22,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29067208396817334 [2023-11-17 16:09:22,271 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 10302 transitions. [2023-11-17 16:09:22,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 10302 transitions. [2023-11-17 16:09:22,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:22,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 10302 transitions. [2023-11-17 16:09:22,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 156.0909090909091) internal successors, (10302), 66 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 537.0) internal successors, (35979), 67 states have internal predecessors, (35979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,331 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 537.0) internal successors, (35979), 67 states have internal predecessors, (35979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,331 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 973 flow. Second operand 66 states and 10302 transitions. [2023-11-17 16:09:22,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1156 transitions, 10067 flow [2023-11-17 16:09:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1156 transitions, 9873 flow, removed 96 selfloop flow, removed 1 redundant places. [2023-11-17 16:09:23,820 INFO L231 Difference]: Finished difference. Result has 198 places, 424 transitions, 5281 flow [2023-11-17 16:09:23,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=5281, PETRI_PLACES=198, PETRI_TRANSITIONS=424} [2023-11-17 16:09:23,821 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 162 predicate places. [2023-11-17 16:09:23,821 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 424 transitions, 5281 flow [2023-11-17 16:09:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 146.3) internal successors, (4389), 30 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:23,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:23,831 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 16:09:24,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:24,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:24,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -763607003, now seen corresponding path program 4 times [2023-11-17 16:09:24,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:24,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111939686] [2023-11-17 16:09:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111939686] [2023-11-17 16:09:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111939686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475781012] [2023-11-17 16:09:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:24,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:24,522 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 16:09:24,525 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 16:09:24,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:24,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:09:24,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:24,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:24,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:24,872 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 15 [2023-11-17 16:09:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475781012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:24,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2023-11-17 16:09:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681000068] [2023-11-17 16:09:24,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:09:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:09:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:09:24,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 537 [2023-11-17 16:09:24,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 424 transitions, 5281 flow. Second operand has 32 states, 32 states have (on average 156.40625) internal successors, (5005), 32 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:24,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:24,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 537 [2023-11-17 16:09:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:40,509 INFO L124 PetriNetUnfolderBase]: 72193/96802 cut-off events. [2023-11-17 16:09:40,509 INFO L125 PetriNetUnfolderBase]: For 1164016/1164016 co-relation queries the response was YES. [2023-11-17 16:09:41,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522504 conditions, 96802 events. 72193/96802 cut-off events. For 1164016/1164016 co-relation queries the response was YES. Maximal size of possible extension queue 3082. Compared 600331 event pairs, 12272 based on Foata normal form. 316/86612 useless extension candidates. Maximal degree in co-relation 490768. Up to 19646 conditions per place. [2023-11-17 16:09:41,861 INFO L140 encePairwiseOnDemand]: 517/537 looper letters, 1932 selfloop transitions, 501 changer transitions 96/2529 dead transitions. [2023-11-17 16:09:41,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 2529 transitions, 36748 flow [2023-11-17 16:09:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:09:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:09:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7439 transitions. [2023-11-17 16:09:41,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30784192013242295 [2023-11-17 16:09:41,868 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7439 transitions. [2023-11-17 16:09:41,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7439 transitions. [2023-11-17 16:09:41,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:41,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7439 transitions. [2023-11-17 16:09:41,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 165.3111111111111) internal successors, (7439), 45 states have internal predecessors, (7439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:41,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 537.0) internal successors, (24702), 46 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:41,892 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 537.0) internal successors, (24702), 46 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:41,892 INFO L175 Difference]: Start difference. First operand has 198 places, 424 transitions, 5281 flow. Second operand 45 states and 7439 transitions. [2023-11-17 16:09:41,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 2529 transitions, 36748 flow [2023-11-17 16:10:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 2529 transitions, 33960 flow, removed 1328 selfloop flow, removed 6 redundant places. [2023-11-17 16:10:06,755 INFO L231 Difference]: Finished difference. Result has 269 places, 892 transitions, 13165 flow [2023-11-17 16:10:06,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13165, PETRI_PLACES=269, PETRI_TRANSITIONS=892} [2023-11-17 16:10:06,756 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 233 predicate places. [2023-11-17 16:10:06,756 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 892 transitions, 13165 flow [2023-11-17 16:10:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.40625) internal successors, (5005), 32 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:06,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:06,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:06,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:10:06,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:06,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:10:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -82937661, now seen corresponding path program 5 times [2023-11-17 16:10:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:06,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98907218] [2023-11-17 16:10:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98907218] [2023-11-17 16:10:07,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98907218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:07,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090918679] [2023-11-17 16:10:07,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:10:07,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:07,600 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 16:10:07,602 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 16:10:07,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:10:07,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:07,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:10:07,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:07,903 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 16:10:07,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:07,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:07,949 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 15 [2023-11-17 16:10:08,130 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 16:10:08,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090918679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:08,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:08,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2023-11-17 16:10:08,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445949562] [2023-11-17 16:10:08,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:10:08,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:10:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:10:08,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 537 [2023-11-17 16:10:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 892 transitions, 13165 flow. Second operand has 30 states, 30 states have (on average 146.26666666666668) internal successors, (4388), 30 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 537 [2023-11-17 16:10:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:45,643 INFO L124 PetriNetUnfolderBase]: 132585/174786 cut-off events. [2023-11-17 16:10:45,643 INFO L125 PetriNetUnfolderBase]: For 2920122/2920122 co-relation queries the response was YES. [2023-11-17 16:10:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161960 conditions, 174786 events. 132585/174786 cut-off events. For 2920122/2920122 co-relation queries the response was YES. Maximal size of possible extension queue 5272. Compared 1077133 event pairs, 18219 based on Foata normal form. 4500/179019 useless extension candidates. Maximal degree in co-relation 1161065. Up to 25380 conditions per place. [2023-11-17 16:10:49,197 INFO L140 encePairwiseOnDemand]: 521/537 looper letters, 1636 selfloop transitions, 1433 changer transitions 0/3069 dead transitions. [2023-11-17 16:10:49,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 3069 transitions, 50347 flow [2023-11-17 16:10:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:10:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:10:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 7257 transitions. [2023-11-17 16:10:49,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29378188000971583 [2023-11-17 16:10:49,222 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 7257 transitions. [2023-11-17 16:10:49,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 7257 transitions. [2023-11-17 16:10:49,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:49,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 7257 transitions. [2023-11-17 16:10:49,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 157.7608695652174) internal successors, (7257), 46 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:49,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 537.0) internal successors, (25239), 47 states have internal predecessors, (25239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:49,269 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 537.0) internal successors, (25239), 47 states have internal predecessors, (25239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:49,269 INFO L175 Difference]: Start difference. First operand has 269 places, 892 transitions, 13165 flow. Second operand 46 states and 7257 transitions. [2023-11-17 16:10:49,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 3069 transitions, 50347 flow