/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:01:47,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:01:47,739 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 12:01:47,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:01:47,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:01:47,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:01:47,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:01:47,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:01:47,768 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:01:47,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:01:47,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:01:47,771 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:01:47,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:01:47,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:01:47,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:01:47,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:01:47,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:01:47,775 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:01:47,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:01:47,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:01:47,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:01:47,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:01:47,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:01:47,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:01:47,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:01:47,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:01:47,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:01:47,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:01:47,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:01:47,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:01:48,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:01:48,001 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:01:48,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-11-17 12:01:49,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:01:49,274 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:01:49,275 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-11-17 12:01:49,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af46f9523/da461d68a7f44a4c94127b241c92c0f6/FLAGbc8d2cbc3 [2023-11-17 12:01:49,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af46f9523/da461d68a7f44a4c94127b241c92c0f6 [2023-11-17 12:01:49,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:01:49,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:01:49,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:01:49,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:01:49,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:01:49,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4750d8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49, skipping insertion in model container [2023-11-17 12:01:49,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,336 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:01:49,467 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/mult-comm.wvr.c[1936,1949] [2023-11-17 12:01:49,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:01:49,479 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:01:49,499 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/mult-comm.wvr.c[1936,1949] [2023-11-17 12:01:49,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:01:49,511 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:01:49,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49 WrapperNode [2023-11-17 12:01:49,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:01:49,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:01:49,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:01:49,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:01:49,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,540 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-17 12:01:49,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:01:49,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:01:49,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:01:49,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:01:49,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:01:49,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:01:49,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:01:49,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:01:49,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (1/1) ... [2023-11-17 12:01:49,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:01:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:49,626 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 12:01:49,634 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 12:01:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:01:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:01:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:01:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:01:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:01:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:01:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:01:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:01:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:01:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:01:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:01:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:01:49,663 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 12:01:49,772 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:01:49,774 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:01:49,923 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:01:50,020 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:01:50,020 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:01:50,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:01:50 BoogieIcfgContainer [2023-11-17 12:01:50,022 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:01:50,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:01:50,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:01:50,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:01:50,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:01:49" (1/3) ... [2023-11-17 12:01:50,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7810a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:01:50, skipping insertion in model container [2023-11-17 12:01:50,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:49" (2/3) ... [2023-11-17 12:01:50,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7810a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:01:50, skipping insertion in model container [2023-11-17 12:01:50,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:01:50" (3/3) ... [2023-11-17 12:01:50,031 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-17 12:01:50,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:01:50,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:01:50,046 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:01:50,121 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:01:50,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-17 12:01:50,190 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-17 12:01:50,191 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:50,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:01:50,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-17 12:01:50,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:50,203 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:01:50,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:50,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:50,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:50,232 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-17 12:01:50,232 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:01:50,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 54 [2023-11-17 12:01:50,273 INFO L134 LiptonReduction]: Checked pairs total: 48 [2023-11-17 12:01:50,273 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 12:01:50,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:01:50,299 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;@62ac2e4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:01:50,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:01:50,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:01:50,304 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:01:50,304 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:50,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:50,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:50,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:50,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1649128522, now seen corresponding path program 1 times [2023-11-17 12:01:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:50,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473363825] [2023-11-17 12:01:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:50,816 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 12:01:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473363825] [2023-11-17 12:01:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473363825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:50,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:50,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:01:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424382178] [2023-11-17 12:01:50,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:50,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:01:50,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:01:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:01:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:50,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:50,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:50,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:50,934 INFO L124 PetriNetUnfolderBase]: 74/134 cut-off events. [2023-11-17 12:01:50,934 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 12:01:50,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 74/134 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-17 12:01:50,939 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-11-17 12:01:50,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 129 flow [2023-11-17 12:01:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:01:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:01:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2023-11-17 12:01:50,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-11-17 12:01:50,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 37 transitions. [2023-11-17 12:01:50,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 37 transitions. [2023-11-17 12:01:50,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:50,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 37 transitions. [2023-11-17 12:01:50,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,959 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 37 transitions. [2023-11-17 12:01:50,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 129 flow [2023-11-17 12:01:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:50,964 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-17 12:01:50,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-17 12:01:50,968 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 12:01:50,969 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-17 12:01:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:50,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:50,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:01:50,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:50,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -406354051, now seen corresponding path program 1 times [2023-11-17 12:01:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312588000] [2023-11-17 12:01:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:51,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312588000] [2023-11-17 12:01:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312588000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806847144] [2023-11-17 12:01:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:51,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:51,315 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 12:01:51,337 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 12:01:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:51,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:01:51,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:51,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806847144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:51,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:51,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-17 12:01:51,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792009715] [2023-11-17 12:01:51,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:51,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:01:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:51,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:01:51,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:01:51,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:51,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:51,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:51,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:51,821 INFO L124 PetriNetUnfolderBase]: 76/143 cut-off events. [2023-11-17 12:01:51,822 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 12:01:51,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 143 events. 76/143 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 405 event pairs, 6 based on Foata normal form. 1/144 useless extension candidates. Maximal degree in co-relation 114. Up to 77 conditions per place. [2023-11-17 12:01:51,824 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 26 selfloop transitions, 5 changer transitions 14/45 dead transitions. [2023-11-17 12:01:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 45 transitions, 214 flow [2023-11-17 12:01:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:01:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:01:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2023-11-17 12:01:51,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-17 12:01:51,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 64 transitions. [2023-11-17 12:01:51,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 64 transitions. [2023-11-17 12:01:51,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:51,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 64 transitions. [2023-11-17 12:01:51,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,830 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 64 transitions. [2023-11-17 12:01:51,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 45 transitions, 214 flow [2023-11-17 12:01:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 45 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:01:51,832 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2023-11-17 12:01:51,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-11-17 12:01:51,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-11-17 12:01:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2023-11-17 12:01:51,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:51,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:51,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:52,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:52,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1514418444, now seen corresponding path program 1 times [2023-11-17 12:01:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:52,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642705107] [2023-11-17 12:01:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642705107] [2023-11-17 12:01:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642705107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526491845] [2023-11-17 12:01:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:52,278 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 12:01:52,279 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 12:01:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:52,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:01:52,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:52,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526491845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:52,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2023-11-17 12:01:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669047607] [2023-11-17 12:01:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:52,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:52,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:52,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:52,767 INFO L124 PetriNetUnfolderBase]: 72/136 cut-off events. [2023-11-17 12:01:52,767 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-17 12:01:52,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 136 events. 72/136 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 386 event pairs, 9 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 386. Up to 73 conditions per place. [2023-11-17 12:01:52,771 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 22 selfloop transitions, 6 changer transitions 18/46 dead transitions. [2023-11-17 12:01:52,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 258 flow [2023-11-17 12:01:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-17 12:01:52,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-17 12:01:52,773 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-17 12:01:52,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-17 12:01:52,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:52,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-17 12:01:52,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,776 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,776 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 7 states and 67 transitions. [2023-11-17 12:01:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 258 flow [2023-11-17 12:01:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 46 transitions, 232 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:52,779 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 96 flow [2023-11-17 12:01:52,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2023-11-17 12:01:52,780 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-11-17 12:01:52,780 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 96 flow [2023-11-17 12:01:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:52,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:52,790 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 12:01:52,990 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,SelfDestructingSolverStorable2 [2023-11-17 12:01:52,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:52,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1977426371, now seen corresponding path program 2 times [2023-11-17 12:01:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633559457] [2023-11-17 12:01:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633559457] [2023-11-17 12:01:53,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633559457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326898355] [2023-11-17 12:01:53,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:53,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:53,247 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 12:01:53,267 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 12:01:53,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:53,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:01:53,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326898355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:53,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:53,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-17 12:01:53,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613562044] [2023-11-17 12:01:53,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:53,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:53,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:53,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:53,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 96 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:53,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:53,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:53,630 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-11-17 12:01:53,630 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-17 12:01:53,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 211 events. 113/211 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 670 event pairs, 15 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 607. Up to 92 conditions per place. [2023-11-17 12:01:53,632 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 38 selfloop transitions, 18 changer transitions 12/68 dead transitions. [2023-11-17 12:01:53,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 68 transitions, 378 flow [2023-11-17 12:01:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2023-11-17 12:01:53,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2023-11-17 12:01:53,633 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 99 transitions. [2023-11-17 12:01:53,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 99 transitions. [2023-11-17 12:01:53,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:53,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 99 transitions. [2023-11-17 12:01:53,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,634 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,635 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 96 flow. Second operand 10 states and 99 transitions. [2023-11-17 12:01:53,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 68 transitions, 378 flow [2023-11-17 12:01:53,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 68 transitions, 363 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:53,636 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 196 flow [2023-11-17 12:01:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-17 12:01:53,637 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-11-17 12:01:53,637 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 196 flow [2023-11-17 12:01:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:53,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:53,643 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 12:01:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:53,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:53,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1639149837, now seen corresponding path program 3 times [2023-11-17 12:01:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:53,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913924514] [2023-11-17 12:01:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913924514] [2023-11-17 12:01:53,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913924514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028344686] [2023-11-17 12:01:53,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:53,970 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 12:01:53,995 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 12:01:54,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:54,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:54,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:01:54,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:54,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028344686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:54,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2023-11-17 12:01:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904926622] [2023-11-17 12:01:54,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:54,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:54,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 196 flow. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:54,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:54,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:54,527 INFO L124 PetriNetUnfolderBase]: 129/239 cut-off events. [2023-11-17 12:01:54,527 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2023-11-17 12:01:54,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 239 events. 129/239 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 805 event pairs, 20 based on Foata normal form. 2/239 useless extension candidates. Maximal degree in co-relation 800. Up to 178 conditions per place. [2023-11-17 12:01:54,529 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 43 selfloop transitions, 17 changer transitions 8/68 dead transitions. [2023-11-17 12:01:54,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 458 flow [2023-11-17 12:01:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2023-11-17 12:01:54,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-11-17 12:01:54,543 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 89 transitions. [2023-11-17 12:01:54,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 89 transitions. [2023-11-17 12:01:54,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:54,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 89 transitions. [2023-11-17 12:01:54,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,545 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,545 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 196 flow. Second operand 10 states and 89 transitions. [2023-11-17 12:01:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 458 flow [2023-11-17 12:01:54,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 399 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:54,550 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 249 flow [2023-11-17 12:01:54,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=249, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-17 12:01:54,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-11-17 12:01:54,552 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 249 flow [2023-11-17 12:01:54,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:54,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:54,575 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 12:01:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:54,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:54,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1380509340, now seen corresponding path program 2 times [2023-11-17 12:01:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341484412] [2023-11-17 12:01:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:54,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341484412] [2023-11-17 12:01:54,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341484412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:54,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382040001] [2023-11-17 12:01:54,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:54,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:54,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:54,895 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 12:01:54,900 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 12:01:54,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:54,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:54,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:01:54,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382040001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:55,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:55,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-17 12:01:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173213945] [2023-11-17 12:01:55,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:55,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:01:55,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:01:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:01:55,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:55,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:55,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:55,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:55,243 INFO L124 PetriNetUnfolderBase]: 161/297 cut-off events. [2023-11-17 12:01:55,243 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-17 12:01:55,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 297 events. 161/297 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1086 event pairs, 31 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 998. Up to 236 conditions per place. [2023-11-17 12:01:55,245 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 51 selfloop transitions, 15 changer transitions 4/70 dead transitions. [2023-11-17 12:01:55,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 511 flow [2023-11-17 12:01:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:01:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:01:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2023-11-17 12:01:55,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-11-17 12:01:55,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 75 transitions. [2023-11-17 12:01:55,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 75 transitions. [2023-11-17 12:01:55,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:55,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 75 transitions. [2023-11-17 12:01:55,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,248 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,248 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 249 flow. Second operand 8 states and 75 transitions. [2023-11-17 12:01:55,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 511 flow [2023-11-17 12:01:55,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 456 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:55,251 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 290 flow [2023-11-17 12:01:55,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=290, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-17 12:01:55,252 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-11-17 12:01:55,252 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 290 flow [2023-11-17 12:01:55,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:55,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:55,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:55,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:55,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash 62379718, now seen corresponding path program 3 times [2023-11-17 12:01:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256541965] [2023-11-17 12:01:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256541965] [2023-11-17 12:01:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256541965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066771611] [2023-11-17 12:01:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:55,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:55,614 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 12:01:55,634 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 12:01:55,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:55,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:55,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:01:55,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066771611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:55,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:55,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-17 12:01:55,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871303136] [2023-11-17 12:01:55,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:55,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:55,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 290 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:55,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:55,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:55,969 INFO L124 PetriNetUnfolderBase]: 205/380 cut-off events. [2023-11-17 12:01:55,969 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-11-17 12:01:55,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 380 events. 205/380 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1498 event pairs, 45 based on Foata normal form. 3/381 useless extension candidates. Maximal degree in co-relation 1317. Up to 270 conditions per place. [2023-11-17 12:01:55,972 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 61 selfloop transitions, 20 changer transitions 7/88 dead transitions. [2023-11-17 12:01:55,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 645 flow [2023-11-17 12:01:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2023-11-17 12:01:55,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-17 12:01:55,973 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 92 transitions. [2023-11-17 12:01:55,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 92 transitions. [2023-11-17 12:01:55,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:55,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 92 transitions. [2023-11-17 12:01:55,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,975 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,975 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 290 flow. Second operand 10 states and 92 transitions. [2023-11-17 12:01:55,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 645 flow [2023-11-17 12:01:55,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 597 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:55,980 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 380 flow [2023-11-17 12:01:55,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-17 12:01:55,981 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 12:01:55,981 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 380 flow [2023-11-17 12:01:55,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:55,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:55,990 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 12:01:56,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:56,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:56,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -454015195, now seen corresponding path program 1 times [2023-11-17 12:01:56,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:56,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443846423] [2023-11-17 12:01:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:56,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:56,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443846423] [2023-11-17 12:01:56,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443846423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:56,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639852385] [2023-11-17 12:01:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:56,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:56,594 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 12:01:56,614 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 12:01:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:56,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:01:56,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:56,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639852385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:57,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:01:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196250270] [2023-11-17 12:01:57,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:01:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:01:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:01:57,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 380 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:57,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:58,473 INFO L124 PetriNetUnfolderBase]: 292/558 cut-off events. [2023-11-17 12:01:58,473 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2023-11-17 12:01:58,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 558 events. 292/558 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2624 event pairs, 33 based on Foata normal form. 3/559 useless extension candidates. Maximal degree in co-relation 1933. Up to 270 conditions per place. [2023-11-17 12:01:58,477 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 93 selfloop transitions, 50 changer transitions 35/178 dead transitions. [2023-11-17 12:01:58,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 178 transitions, 1220 flow [2023-11-17 12:01:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:01:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:01:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 214 transitions. [2023-11-17 12:01:58,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2023-11-17 12:01:58,479 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 214 transitions. [2023-11-17 12:01:58,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 214 transitions. [2023-11-17 12:01:58,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:58,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 214 transitions. [2023-11-17 12:01:58,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.916666666666666) internal successors, (214), 24 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,481 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,481 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 380 flow. Second operand 24 states and 214 transitions. [2023-11-17 12:01:58,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 178 transitions, 1220 flow [2023-11-17 12:01:58,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 178 transitions, 1156 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:58,487 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 632 flow [2023-11-17 12:01:58,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=632, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-11-17 12:01:58,488 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-11-17 12:01:58,488 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 632 flow [2023-11-17 12:01:58,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:58,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:58,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:58,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:58,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash -500732627, now seen corresponding path program 2 times [2023-11-17 12:01:58,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312338648] [2023-11-17 12:01:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:59,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:59,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312338648] [2023-11-17 12:01:59,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312338648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:59,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342667450] [2023-11-17 12:01:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:59,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:59,226 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 12:01:59,245 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 12:01:59,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:59,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:01:59,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:59,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342667450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:00,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-17 12:02:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807239683] [2023-11-17 12:02:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:00,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:02:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:02:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:02:00,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:00,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 632 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:00,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:00,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:00,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:01,950 INFO L124 PetriNetUnfolderBase]: 323/624 cut-off events. [2023-11-17 12:02:01,951 INFO L125 PetriNetUnfolderBase]: For 3149/3149 co-relation queries the response was YES. [2023-11-17 12:02:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 624 events. 323/624 cut-off events. For 3149/3149 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3101 event pairs, 27 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 2787. Up to 281 conditions per place. [2023-11-17 12:02:01,958 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 93 selfloop transitions, 74 changer transitions 19/186 dead transitions. [2023-11-17 12:02:01,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 1613 flow [2023-11-17 12:02:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:02:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:02:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 216 transitions. [2023-11-17 12:02:01,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432 [2023-11-17 12:02:01,963 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 216 transitions. [2023-11-17 12:02:01,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 216 transitions. [2023-11-17 12:02:01,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:01,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 216 transitions. [2023-11-17 12:02:01,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.64) internal successors, (216), 25 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,968 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,968 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 632 flow. Second operand 25 states and 216 transitions. [2023-11-17 12:02:01,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 1613 flow [2023-11-17 12:02:01,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 186 transitions, 1427 flow, removed 74 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:01,986 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 1041 flow [2023-11-17 12:02:01,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1041, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-11-17 12:02:01,987 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-11-17 12:02:01,987 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 1041 flow [2023-11-17 12:02:01,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:01,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:02,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 12:02:02,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-17 12:02:02,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash 277182768, now seen corresponding path program 4 times [2023-11-17 12:02:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690241011] [2023-11-17 12:02:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:02,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:02,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690241011] [2023-11-17 12:02:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690241011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:02,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914380477] [2023-11-17 12:02:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:02,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:02,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:02:02,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:02,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:02:02,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:02,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914380477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:04,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:04,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-11-17 12:02:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020593935] [2023-11-17 12:02:04,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:04,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:02:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:02:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2023-11-17 12:02:04,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:04,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 1041 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:04,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:04,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:04,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:05,177 INFO L124 PetriNetUnfolderBase]: 325/624 cut-off events. [2023-11-17 12:02:05,178 INFO L125 PetriNetUnfolderBase]: For 3793/3793 co-relation queries the response was YES. [2023-11-17 12:02:05,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 624 events. 325/624 cut-off events. For 3793/3793 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3027 event pairs, 61 based on Foata normal form. 3/623 useless extension candidates. Maximal degree in co-relation 3083. Up to 526 conditions per place. [2023-11-17 12:02:05,182 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 110 selfloop transitions, 16 changer transitions 21/147 dead transitions. [2023-11-17 12:02:05,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 147 transitions, 1498 flow [2023-11-17 12:02:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:02:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:02:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 101 transitions. [2023-11-17 12:02:05,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2023-11-17 12:02:05,183 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 101 transitions. [2023-11-17 12:02:05,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 101 transitions. [2023-11-17 12:02:05,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:05,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 101 transitions. [2023-11-17 12:02:05,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,185 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,185 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 1041 flow. Second operand 11 states and 101 transitions. [2023-11-17 12:02:05,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 147 transitions, 1498 flow [2023-11-17 12:02:05,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1207 flow, removed 128 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:05,200 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 825 flow [2023-11-17 12:02:05,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=825, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2023-11-17 12:02:05,201 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2023-11-17 12:02:05,201 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 825 flow [2023-11-17 12:02:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:05,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:05,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:05,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 12:02:05,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:05,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash 769648465, now seen corresponding path program 3 times [2023-11-17 12:02:05,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:05,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885071933] [2023-11-17 12:02:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885071933] [2023-11-17 12:02:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885071933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043601940] [2023-11-17 12:02:06,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:06,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:06,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:06,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:02:06,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:02:06,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:06,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:02:06,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:06,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:07,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043601940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:07,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:07,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-17 12:02:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448864477] [2023-11-17 12:02:07,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:02:07,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:02:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:02:07,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:07,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 825 flow. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:07,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:07,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:12,117 INFO L124 PetriNetUnfolderBase]: 410/782 cut-off events. [2023-11-17 12:02:12,118 INFO L125 PetriNetUnfolderBase]: For 3166/3166 co-relation queries the response was YES. [2023-11-17 12:02:12,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 782 events. 410/782 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3991 event pairs, 26 based on Foata normal form. 4/776 useless extension candidates. Maximal degree in co-relation 3612. Up to 293 conditions per place. [2023-11-17 12:02:12,123 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 117 selfloop transitions, 104 changer transitions 20/241 dead transitions. [2023-11-17 12:02:12,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 241 transitions, 2073 flow [2023-11-17 12:02:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:02:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:02:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 285 transitions. [2023-11-17 12:02:12,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2023-11-17 12:02:12,126 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 285 transitions. [2023-11-17 12:02:12,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 285 transitions. [2023-11-17 12:02:12,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:12,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 285 transitions. [2023-11-17 12:02:12,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.636363636363637) internal successors, (285), 33 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:12,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:12,131 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:12,132 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 825 flow. Second operand 33 states and 285 transitions. [2023-11-17 12:02:12,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 241 transitions, 2073 flow [2023-11-17 12:02:12,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 241 transitions, 2027 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-17 12:02:12,157 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1443 flow [2023-11-17 12:02:12,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1443, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2023-11-17 12:02:12,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-11-17 12:02:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1443 flow [2023-11-17 12:02:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:12,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:12,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:12,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 12:02:12,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:12,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash -656280941, now seen corresponding path program 4 times [2023-11-17 12:02:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:12,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231302593] [2023-11-17 12:02:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231302593] [2023-11-17 12:02:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231302593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232198946] [2023-11-17 12:02:12,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:12,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:12,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:12,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:02:12,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:12,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:12,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:12,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:12,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232198946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:13,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453047340] [2023-11-17 12:02:13,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:13,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:13,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1443 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:13,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:13,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:13,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:14,780 INFO L124 PetriNetUnfolderBase]: 446/853 cut-off events. [2023-11-17 12:02:14,780 INFO L125 PetriNetUnfolderBase]: For 5603/5603 co-relation queries the response was YES. [2023-11-17 12:02:14,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 853 events. 446/853 cut-off events. For 5603/5603 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4440 event pairs, 75 based on Foata normal form. 2/843 useless extension candidates. Maximal degree in co-relation 4637. Up to 730 conditions per place. [2023-11-17 12:02:14,788 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 162 selfloop transitions, 34 changer transitions 16/212 dead transitions. [2023-11-17 12:02:14,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 212 transitions, 2335 flow [2023-11-17 12:02:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:02:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:02:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2023-11-17 12:02:14,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 12:02:14,790 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 140 transitions. [2023-11-17 12:02:14,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 140 transitions. [2023-11-17 12:02:14,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:14,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 140 transitions. [2023-11-17 12:02:14,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.75) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,791 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,791 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1443 flow. Second operand 16 states and 140 transitions. [2023-11-17 12:02:14,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 212 transitions, 2335 flow [2023-11-17 12:02:14,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 212 transitions, 1870 flow, removed 164 selfloop flow, removed 22 redundant places. [2023-11-17 12:02:14,816 INFO L231 Difference]: Finished difference. Result has 134 places, 166 transitions, 1403 flow [2023-11-17 12:02:14,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1403, PETRI_PLACES=134, PETRI_TRANSITIONS=166} [2023-11-17 12:02:14,817 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-11-17 12:02:14,817 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 166 transitions, 1403 flow [2023-11-17 12:02:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:14,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:15,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 12:02:15,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:15,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash -740374965, now seen corresponding path program 5 times [2023-11-17 12:02:15,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397423163] [2023-11-17 12:02:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397423163] [2023-11-17 12:02:15,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397423163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411366931] [2023-11-17 12:02:15,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:15,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:15,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:15,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:02:15,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:15,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:15,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:15,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:15,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:16,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411366931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:16,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:16,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76435250] [2023-11-17 12:02:16,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:16,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:16,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:16,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:16,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 166 transitions, 1403 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:16,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:16,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:16,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:17,536 INFO L124 PetriNetUnfolderBase]: 491/950 cut-off events. [2023-11-17 12:02:17,536 INFO L125 PetriNetUnfolderBase]: For 6141/6141 co-relation queries the response was YES. [2023-11-17 12:02:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4971 conditions, 950 events. 491/950 cut-off events. For 6141/6141 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5191 event pairs, 72 based on Foata normal form. 2/938 useless extension candidates. Maximal degree in co-relation 4929. Up to 781 conditions per place. [2023-11-17 12:02:17,543 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 179 selfloop transitions, 53 changer transitions 10/242 dead transitions. [2023-11-17 12:02:17,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 242 transitions, 2534 flow [2023-11-17 12:02:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:02:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:02:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 169 transitions. [2023-11-17 12:02:17,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2023-11-17 12:02:17,556 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 169 transitions. [2023-11-17 12:02:17,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 169 transitions. [2023-11-17 12:02:17,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:17,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 169 transitions. [2023-11-17 12:02:17,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.047619047619047) internal successors, (169), 21 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,557 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,557 INFO L175 Difference]: Start difference. First operand has 134 places, 166 transitions, 1403 flow. Second operand 21 states and 169 transitions. [2023-11-17 12:02:17,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 242 transitions, 2534 flow [2023-11-17 12:02:17,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 242 transitions, 2406 flow, removed 62 selfloop flow, removed 2 redundant places. [2023-11-17 12:02:17,582 INFO L231 Difference]: Finished difference. Result has 160 places, 192 transitions, 1875 flow [2023-11-17 12:02:17,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1875, PETRI_PLACES=160, PETRI_TRANSITIONS=192} [2023-11-17 12:02:17,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2023-11-17 12:02:17,583 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 192 transitions, 1875 flow [2023-11-17 12:02:17,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:17,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:17,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:17,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:02:17,789 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:17,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -819513315, now seen corresponding path program 6 times [2023-11-17 12:02:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:17,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916772719] [2023-11-17 12:02:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:17,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:18,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916772719] [2023-11-17 12:02:18,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916772719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:18,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307436480] [2023-11-17 12:02:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:18,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:18,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:18,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:02:18,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:02:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:18,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:18,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:18,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:19,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307436480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:19,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:19,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712408965] [2023-11-17 12:02:19,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:19,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 192 transitions, 1875 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:20,596 INFO L124 PetriNetUnfolderBase]: 485/922 cut-off events. [2023-11-17 12:02:20,597 INFO L125 PetriNetUnfolderBase]: For 6746/6746 co-relation queries the response was YES. [2023-11-17 12:02:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5025 conditions, 922 events. 485/922 cut-off events. For 6746/6746 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4870 event pairs, 72 based on Foata normal form. 2/908 useless extension candidates. Maximal degree in co-relation 4974. Up to 781 conditions per place. [2023-11-17 12:02:20,606 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 168 selfloop transitions, 53 changer transitions 10/231 dead transitions. [2023-11-17 12:02:20,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 2510 flow [2023-11-17 12:02:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:02:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:02:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 150 transitions. [2023-11-17 12:02:20,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 12:02:20,616 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 150 transitions. [2023-11-17 12:02:20,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 150 transitions. [2023-11-17 12:02:20,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:20,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 150 transitions. [2023-11-17 12:02:20,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.5) internal successors, (150), 20 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:20,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 20.0) internal successors, (420), 21 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:20,618 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 20.0) internal successors, (420), 21 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:20,618 INFO L175 Difference]: Start difference. First operand has 160 places, 192 transitions, 1875 flow. Second operand 20 states and 150 transitions. [2023-11-17 12:02:20,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 2510 flow [2023-11-17 12:02:20,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 231 transitions, 2225 flow, removed 124 selfloop flow, removed 9 redundant places. [2023-11-17 12:02:20,663 INFO L231 Difference]: Finished difference. Result has 172 places, 194 transitions, 1800 flow [2023-11-17 12:02:20,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1800, PETRI_PLACES=172, PETRI_TRANSITIONS=194} [2023-11-17 12:02:20,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2023-11-17 12:02:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 194 transitions, 1800 flow [2023-11-17 12:02:20,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:20,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:20,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:20,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:02:20,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:20,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1599844141, now seen corresponding path program 7 times [2023-11-17 12:02:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256934746] [2023-11-17 12:02:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256934746] [2023-11-17 12:02:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256934746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:21,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471260481] [2023-11-17 12:02:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:21,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:21,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:02:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:21,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:21,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471260481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:22,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31937444] [2023-11-17 12:02:22,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:22,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:22,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 194 transitions, 1800 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:22,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:22,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:22,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:23,388 INFO L124 PetriNetUnfolderBase]: 485/932 cut-off events. [2023-11-17 12:02:23,389 INFO L125 PetriNetUnfolderBase]: For 6182/6182 co-relation queries the response was YES. [2023-11-17 12:02:23,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 932 events. 485/932 cut-off events. For 6182/6182 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4985 event pairs, 74 based on Foata normal form. 4/920 useless extension candidates. Maximal degree in co-relation 4963. Up to 839 conditions per place. [2023-11-17 12:02:23,401 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 179 selfloop transitions, 38 changer transitions 9/226 dead transitions. [2023-11-17 12:02:23,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 226 transitions, 2460 flow [2023-11-17 12:02:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 124 transitions. [2023-11-17 12:02:23,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36470588235294116 [2023-11-17 12:02:23,403 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 124 transitions. [2023-11-17 12:02:23,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 124 transitions. [2023-11-17 12:02:23,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:23,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 124 transitions. [2023-11-17 12:02:23,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,404 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,405 INFO L175 Difference]: Start difference. First operand has 172 places, 194 transitions, 1800 flow. Second operand 17 states and 124 transitions. [2023-11-17 12:02:23,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 226 transitions, 2460 flow [2023-11-17 12:02:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2297 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-11-17 12:02:23,443 INFO L231 Difference]: Finished difference. Result has 176 places, 197 transitions, 1826 flow [2023-11-17 12:02:23,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1826, PETRI_PLACES=176, PETRI_TRANSITIONS=197} [2023-11-17 12:02:23,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 156 predicate places. [2023-11-17 12:02:23,444 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 197 transitions, 1826 flow [2023-11-17 12:02:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:23,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:23,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:23,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:23,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 988672369, now seen corresponding path program 8 times [2023-11-17 12:02:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141595215] [2023-11-17 12:02:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141595215] [2023-11-17 12:02:24,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141595215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642092764] [2023-11-17 12:02:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:24,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:24,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:02:24,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:24,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:24,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:24,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:25,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642092764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:25,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:25,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109573888] [2023-11-17 12:02:25,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:25,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:25,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:25,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 197 transitions, 1826 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:25,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:25,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:25,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:26,937 INFO L124 PetriNetUnfolderBase]: 515/978 cut-off events. [2023-11-17 12:02:26,937 INFO L125 PetriNetUnfolderBase]: For 7224/7224 co-relation queries the response was YES. [2023-11-17 12:02:26,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5392 conditions, 978 events. 515/978 cut-off events. For 7224/7224 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5259 event pairs, 75 based on Foata normal form. 2/964 useless extension candidates. Maximal degree in co-relation 5335. Up to 815 conditions per place. [2023-11-17 12:02:26,950 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 176 selfloop transitions, 56 changer transitions 10/242 dead transitions. [2023-11-17 12:02:26,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 2690 flow [2023-11-17 12:02:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 133 transitions. [2023-11-17 12:02:26,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911764705882353 [2023-11-17 12:02:26,955 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 133 transitions. [2023-11-17 12:02:26,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 133 transitions. [2023-11-17 12:02:26,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:26,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 133 transitions. [2023-11-17 12:02:26,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.823529411764706) internal successors, (133), 17 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,957 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,958 INFO L175 Difference]: Start difference. First operand has 176 places, 197 transitions, 1826 flow. Second operand 17 states and 133 transitions. [2023-11-17 12:02:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 2690 flow [2023-11-17 12:02:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 242 transitions, 2580 flow, removed 23 selfloop flow, removed 14 redundant places. [2023-11-17 12:02:26,999 INFO L231 Difference]: Finished difference. Result has 182 places, 207 transitions, 2083 flow [2023-11-17 12:02:27,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2083, PETRI_PLACES=182, PETRI_TRANSITIONS=207} [2023-11-17 12:02:27,000 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-11-17 12:02:27,000 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 207 transitions, 2083 flow [2023-11-17 12:02:27,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:27,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:27,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:27,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 12:02:27,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:02:27,225 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:27,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash 909534019, now seen corresponding path program 9 times [2023-11-17 12:02:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:27,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051019028] [2023-11-17 12:02:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:27,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051019028] [2023-11-17 12:02:27,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051019028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:27,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497322951] [2023-11-17 12:02:27,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:27,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:27,817 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:27,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:02:27,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:27,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:27,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:27,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497322951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:29,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232671530] [2023-11-17 12:02:29,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 207 transitions, 2083 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:30,406 INFO L124 PetriNetUnfolderBase]: 518/985 cut-off events. [2023-11-17 12:02:30,406 INFO L125 PetriNetUnfolderBase]: For 8383/8383 co-relation queries the response was YES. [2023-11-17 12:02:30,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 985 events. 518/985 cut-off events. For 8383/8383 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5317 event pairs, 75 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 5606. Up to 819 conditions per place. [2023-11-17 12:02:30,418 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 183 selfloop transitions, 57 changer transitions 10/250 dead transitions. [2023-11-17 12:02:30,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 250 transitions, 2834 flow [2023-11-17 12:02:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:02:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:02:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 148 transitions. [2023-11-17 12:02:30,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-11-17 12:02:30,420 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 148 transitions. [2023-11-17 12:02:30,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 148 transitions. [2023-11-17 12:02:30,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:30,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 148 transitions. [2023-11-17 12:02:30,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.222222222222221) internal successors, (148), 18 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 20.0) internal successors, (380), 19 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,422 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 20.0) internal successors, (380), 19 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,422 INFO L175 Difference]: Start difference. First operand has 182 places, 207 transitions, 2083 flow. Second operand 18 states and 148 transitions. [2023-11-17 12:02:30,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 250 transitions, 2834 flow [2023-11-17 12:02:30,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 2623 flow, removed 83 selfloop flow, removed 10 redundant places. [2023-11-17 12:02:30,479 INFO L231 Difference]: Finished difference. Result has 190 places, 210 transitions, 2128 flow [2023-11-17 12:02:30,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2128, PETRI_PLACES=190, PETRI_TRANSITIONS=210} [2023-11-17 12:02:30,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-11-17 12:02:30,480 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 210 transitions, 2128 flow [2023-11-17 12:02:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:30,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:30,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:30,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:02:30,688 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:30,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash -103635573, now seen corresponding path program 10 times [2023-11-17 12:02:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:30,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375550104] [2023-11-17 12:02:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:30,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:31,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:31,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375550104] [2023-11-17 12:02:31,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375550104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:31,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582999962] [2023-11-17 12:02:31,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:31,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:31,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:31,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:31,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:02:31,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:31,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:31,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:31,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:32,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582999962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:32,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:32,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19573710] [2023-11-17 12:02:32,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:32,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:32,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 210 transitions, 2128 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:32,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:32,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:32,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:33,531 INFO L124 PetriNetUnfolderBase]: 537/1020 cut-off events. [2023-11-17 12:02:33,531 INFO L125 PetriNetUnfolderBase]: For 8463/8463 co-relation queries the response was YES. [2023-11-17 12:02:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 1020 events. 537/1020 cut-off events. For 8463/8463 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5533 event pairs, 74 based on Foata normal form. 2/1008 useless extension candidates. Maximal degree in co-relation 5906. Up to 885 conditions per place. [2023-11-17 12:02:33,552 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 214 selfloop transitions, 43 changer transitions 16/273 dead transitions. [2023-11-17 12:02:33,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3161 flow [2023-11-17 12:02:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:02:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:02:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 156 transitions. [2023-11-17 12:02:33,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 12:02:33,555 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 156 transitions. [2023-11-17 12:02:33,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 156 transitions. [2023-11-17 12:02:33,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:33,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 156 transitions. [2023-11-17 12:02:33,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:33,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 20.0) internal successors, (380), 19 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:33,563 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 20.0) internal successors, (380), 19 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:33,563 INFO L175 Difference]: Start difference. First operand has 190 places, 210 transitions, 2128 flow. Second operand 18 states and 156 transitions. [2023-11-17 12:02:33,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3161 flow [2023-11-17 12:02:33,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 273 transitions, 2960 flow, removed 68 selfloop flow, removed 14 redundant places. [2023-11-17 12:02:33,614 INFO L231 Difference]: Finished difference. Result has 199 places, 224 transitions, 2324 flow [2023-11-17 12:02:33,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2324, PETRI_PLACES=199, PETRI_TRANSITIONS=224} [2023-11-17 12:02:33,615 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 179 predicate places. [2023-11-17 12:02:33,615 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 224 transitions, 2324 flow [2023-11-17 12:02:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:33,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:33,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:33,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:02:33,824 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:33,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -285636277, now seen corresponding path program 11 times [2023-11-17 12:02:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:33,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144037857] [2023-11-17 12:02:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:34,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144037857] [2023-11-17 12:02:34,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144037857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:34,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545700148] [2023-11-17 12:02:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:34,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:34,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:02:34,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:02:34,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:34,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:34,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:34,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:35,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545700148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:35,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390941479] [2023-11-17 12:02:35,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:35,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:35,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 224 transitions, 2324 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:35,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:35,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:37,320 INFO L124 PetriNetUnfolderBase]: 561/1068 cut-off events. [2023-11-17 12:02:37,320 INFO L125 PetriNetUnfolderBase]: For 11270/11270 co-relation queries the response was YES. [2023-11-17 12:02:37,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6615 conditions, 1068 events. 561/1068 cut-off events. For 11270/11270 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5874 event pairs, 70 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6547. Up to 895 conditions per place. [2023-11-17 12:02:37,331 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 202 selfloop transitions, 59 changer transitions 11/272 dead transitions. [2023-11-17 12:02:37,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 272 transitions, 3434 flow [2023-11-17 12:02:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2023-11-17 12:02:37,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38823529411764707 [2023-11-17 12:02:37,332 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 132 transitions. [2023-11-17 12:02:37,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 132 transitions. [2023-11-17 12:02:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:37,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 132 transitions. [2023-11-17 12:02:37,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.764705882352941) internal successors, (132), 17 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:37,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:37,333 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:37,333 INFO L175 Difference]: Start difference. First operand has 199 places, 224 transitions, 2324 flow. Second operand 17 states and 132 transitions. [2023-11-17 12:02:37,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 272 transitions, 3434 flow [2023-11-17 12:02:37,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 272 transitions, 3217 flow, removed 85 selfloop flow, removed 11 redundant places. [2023-11-17 12:02:37,377 INFO L231 Difference]: Finished difference. Result has 210 places, 238 transitions, 2656 flow [2023-11-17 12:02:37,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2656, PETRI_PLACES=210, PETRI_TRANSITIONS=238} [2023-11-17 12:02:37,378 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 190 predicate places. [2023-11-17 12:02:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 238 transitions, 2656 flow [2023-11-17 12:02:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:37,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:37,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:02:37,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:37,581 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:37,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1526527947, now seen corresponding path program 12 times [2023-11-17 12:02:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:37,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897062690] [2023-11-17 12:02:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:37,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:37,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897062690] [2023-11-17 12:02:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897062690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276432324] [2023-11-17 12:02:37,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:37,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:37,965 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:37,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:02:38,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:02:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:38,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:38,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:38,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276432324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:39,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:39,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469607099] [2023-11-17 12:02:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:39,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:39,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 238 transitions, 2656 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:39,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:39,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:40,071 INFO L124 PetriNetUnfolderBase]: 588/1116 cut-off events. [2023-11-17 12:02:40,071 INFO L125 PetriNetUnfolderBase]: For 15057/15057 co-relation queries the response was YES. [2023-11-17 12:02:40,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 1116 events. 588/1116 cut-off events. For 15057/15057 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6209 event pairs, 76 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 7212. Up to 950 conditions per place. [2023-11-17 12:02:40,081 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 219 selfloop transitions, 57 changer transitions 11/287 dead transitions. [2023-11-17 12:02:40,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 3732 flow [2023-11-17 12:02:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:02:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:02:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 157 transitions. [2023-11-17 12:02:40,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2023-11-17 12:02:40,082 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 157 transitions. [2023-11-17 12:02:40,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 157 transitions. [2023-11-17 12:02:40,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:40,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 157 transitions. [2023-11-17 12:02:40,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,084 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,084 INFO L175 Difference]: Start difference. First operand has 210 places, 238 transitions, 2656 flow. Second operand 21 states and 157 transitions. [2023-11-17 12:02:40,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 3732 flow [2023-11-17 12:02:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 287 transitions, 3419 flow, removed 132 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:40,145 INFO L231 Difference]: Finished difference. Result has 221 places, 248 transitions, 2779 flow [2023-11-17 12:02:40,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2779, PETRI_PLACES=221, PETRI_TRANSITIONS=248} [2023-11-17 12:02:40,145 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-11-17 12:02:40,145 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 248 transitions, 2779 flow [2023-11-17 12:02:40,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:40,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:40,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 12:02:40,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:40,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:40,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1061988563, now seen corresponding path program 13 times [2023-11-17 12:02:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:40,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449791787] [2023-11-17 12:02:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449791787] [2023-11-17 12:02:40,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449791787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914544535] [2023-11-17 12:02:40,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:40,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:40,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:40,664 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:40,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:02:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:40,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:40,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:40,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:41,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914544535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:41,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:41,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961637389] [2023-11-17 12:02:41,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:41,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:41,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 248 transitions, 2779 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:41,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:41,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:41,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:42,328 INFO L124 PetriNetUnfolderBase]: 594/1129 cut-off events. [2023-11-17 12:02:42,328 INFO L125 PetriNetUnfolderBase]: For 15560/15560 co-relation queries the response was YES. [2023-11-17 12:02:42,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 1129 events. 594/1129 cut-off events. For 15560/15560 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6311 event pairs, 88 based on Foata normal form. 4/1121 useless extension candidates. Maximal degree in co-relation 7211. Up to 1030 conditions per place. [2023-11-17 12:02:42,337 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 225 selfloop transitions, 43 changer transitions 9/277 dead transitions. [2023-11-17 12:02:42,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 277 transitions, 3558 flow [2023-11-17 12:02:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:02:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:02:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 111 transitions. [2023-11-17 12:02:42,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-11-17 12:02:42,341 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 111 transitions. [2023-11-17 12:02:42,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 111 transitions. [2023-11-17 12:02:42,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:42,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 111 transitions. [2023-11-17 12:02:42,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:42,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:42,342 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:42,342 INFO L175 Difference]: Start difference. First operand has 221 places, 248 transitions, 2779 flow. Second operand 15 states and 111 transitions. [2023-11-17 12:02:42,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 277 transitions, 3558 flow [2023-11-17 12:02:42,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 277 transitions, 3292 flow, removed 98 selfloop flow, removed 18 redundant places. [2023-11-17 12:02:42,410 INFO L231 Difference]: Finished difference. Result has 220 places, 252 transitions, 2726 flow [2023-11-17 12:02:42,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2726, PETRI_PLACES=220, PETRI_TRANSITIONS=252} [2023-11-17 12:02:42,411 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-11-17 12:02:42,411 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 252 transitions, 2726 flow [2023-11-17 12:02:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:42,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:42,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-17 12:02:42,617 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:42,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1916821429, now seen corresponding path program 14 times [2023-11-17 12:02:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880729711] [2023-11-17 12:02:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880729711] [2023-11-17 12:02:42,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880729711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450418777] [2023-11-17 12:02:42,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:42,945 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:42,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:02:43,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:43,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:43,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:43,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450418777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:43,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-17 12:02:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352759013] [2023-11-17 12:02:43,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:02:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:02:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:02:43,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:43,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 252 transitions, 2726 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:43,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:43,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:43,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:44,806 INFO L124 PetriNetUnfolderBase]: 655/1244 cut-off events. [2023-11-17 12:02:44,806 INFO L125 PetriNetUnfolderBase]: For 19049/19049 co-relation queries the response was YES. [2023-11-17 12:02:44,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8096 conditions, 1244 events. 655/1244 cut-off events. For 19049/19049 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7138 event pairs, 74 based on Foata normal form. 3/1233 useless extension candidates. Maximal degree in co-relation 8023. Up to 1002 conditions per place. [2023-11-17 12:02:44,816 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 238 selfloop transitions, 77 changer transitions 21/336 dead transitions. [2023-11-17 12:02:44,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 336 transitions, 4426 flow [2023-11-17 12:02:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:02:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:02:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 180 transitions. [2023-11-17 12:02:44,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 12:02:44,817 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 180 transitions. [2023-11-17 12:02:44,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 180 transitions. [2023-11-17 12:02:44,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:44,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 180 transitions. [2023-11-17 12:02:44,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.181818181818182) internal successors, (180), 22 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:44,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 20.0) internal successors, (460), 23 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:44,818 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 20.0) internal successors, (460), 23 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:44,818 INFO L175 Difference]: Start difference. First operand has 220 places, 252 transitions, 2726 flow. Second operand 22 states and 180 transitions. [2023-11-17 12:02:44,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 336 transitions, 4426 flow [2023-11-17 12:02:44,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 336 transitions, 4302 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:44,884 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 3463 flow [2023-11-17 12:02:44,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3463, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2023-11-17 12:02:44,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-11-17 12:02:44,885 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 3463 flow [2023-11-17 12:02:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:44,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:44,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:44,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-17 12:02:45,091 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:45,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1447389597, now seen corresponding path program 15 times [2023-11-17 12:02:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702666277] [2023-11-17 12:02:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:45,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702666277] [2023-11-17 12:02:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702666277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341717834] [2023-11-17 12:02:45,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:45,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:45,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:45,424 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:45,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:02:45,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:45,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:45,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:45,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341717834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:46,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205703786] [2023-11-17 12:02:46,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:46,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:46,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 3463 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:46,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:46,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:47,464 INFO L124 PetriNetUnfolderBase]: 641/1209 cut-off events. [2023-11-17 12:02:47,465 INFO L125 PetriNetUnfolderBase]: For 17299/17299 co-relation queries the response was YES. [2023-11-17 12:02:47,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8014 conditions, 1209 events. 641/1209 cut-off events. For 17299/17299 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6825 event pairs, 72 based on Foata normal form. 2/1197 useless extension candidates. Maximal degree in co-relation 7939. Up to 1046 conditions per place. [2023-11-17 12:02:47,489 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 265 selfloop transitions, 58 changer transitions 10/333 dead transitions. [2023-11-17 12:02:47,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 333 transitions, 4396 flow [2023-11-17 12:02:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:02:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:02:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 184 transitions. [2023-11-17 12:02:47,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-11-17 12:02:47,491 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 184 transitions. [2023-11-17 12:02:47,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 184 transitions. [2023-11-17 12:02:47,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:47,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 184 transitions. [2023-11-17 12:02:47,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.666666666666667) internal successors, (184), 24 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,492 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,492 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 3463 flow. Second operand 24 states and 184 transitions. [2023-11-17 12:02:47,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 333 transitions, 4396 flow [2023-11-17 12:02:47,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 333 transitions, 3870 flow, removed 251 selfloop flow, removed 9 redundant places. [2023-11-17 12:02:47,561 INFO L231 Difference]: Finished difference. Result has 247 places, 286 transitions, 3185 flow [2023-11-17 12:02:47,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3185, PETRI_PLACES=247, PETRI_TRANSITIONS=286} [2023-11-17 12:02:47,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-11-17 12:02:47,562 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 286 transitions, 3185 flow [2023-11-17 12:02:47,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:47,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:47,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:47,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:47,767 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -202519387, now seen corresponding path program 16 times [2023-11-17 12:02:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199414534] [2023-11-17 12:02:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:48,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:48,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199414534] [2023-11-17 12:02:48,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199414534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:48,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422278308] [2023-11-17 12:02:48,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:48,048 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:02:48,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:48,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:48,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:48,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:48,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422278308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:48,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:48,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815002633] [2023-11-17 12:02:48,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:48,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:48,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 286 transitions, 3185 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:48,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:48,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:48,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:49,716 INFO L124 PetriNetUnfolderBase]: 632/1202 cut-off events. [2023-11-17 12:02:49,716 INFO L125 PetriNetUnfolderBase]: For 12879/12879 co-relation queries the response was YES. [2023-11-17 12:02:49,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 1202 events. 632/1202 cut-off events. For 12879/12879 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6837 event pairs, 80 based on Foata normal form. 2/1184 useless extension candidates. Maximal degree in co-relation 7415. Up to 1046 conditions per place. [2023-11-17 12:02:49,725 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 249 selfloop transitions, 63 changer transitions 8/320 dead transitions. [2023-11-17 12:02:49,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 320 transitions, 4054 flow [2023-11-17 12:02:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2023-11-17 12:02:49,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2023-11-17 12:02:49,726 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 135 transitions. [2023-11-17 12:02:49,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 135 transitions. [2023-11-17 12:02:49,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:49,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 135 transitions. [2023-11-17 12:02:49,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:49,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:49,728 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:49,728 INFO L175 Difference]: Start difference. First operand has 247 places, 286 transitions, 3185 flow. Second operand 17 states and 135 transitions. [2023-11-17 12:02:49,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 320 transitions, 4054 flow [2023-11-17 12:02:49,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 320 transitions, 3810 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-11-17 12:02:49,800 INFO L231 Difference]: Finished difference. Result has 244 places, 289 transitions, 3189 flow [2023-11-17 12:02:49,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3189, PETRI_PLACES=244, PETRI_TRANSITIONS=289} [2023-11-17 12:02:49,800 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2023-11-17 12:02:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 289 transitions, 3189 flow [2023-11-17 12:02:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:49,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:49,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:49,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 12:02:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:50,006 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:50,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1898387403, now seen corresponding path program 17 times [2023-11-17 12:02:50,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:50,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170414733] [2023-11-17 12:02:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:50,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170414733] [2023-11-17 12:02:50,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170414733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:50,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243713225] [2023-11-17 12:02:50,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:50,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:50,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:50,270 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:50,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:02:50,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:50,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:50,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:50,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243713225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:50,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:02:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517925154] [2023-11-17 12:02:50,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:50,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:50,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:50,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 289 transitions, 3189 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:50,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:50,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:50,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:52,255 INFO L124 PetriNetUnfolderBase]: 634/1215 cut-off events. [2023-11-17 12:02:52,256 INFO L125 PetriNetUnfolderBase]: For 13271/13271 co-relation queries the response was YES. [2023-11-17 12:02:52,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7599 conditions, 1215 events. 634/1215 cut-off events. For 13271/13271 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6960 event pairs, 72 based on Foata normal form. 3/1198 useless extension candidates. Maximal degree in co-relation 7524. Up to 1019 conditions per place. [2023-11-17 12:02:52,264 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 254 selfloop transitions, 72 changer transitions 19/345 dead transitions. [2023-11-17 12:02:52,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 345 transitions, 4255 flow [2023-11-17 12:02:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:02:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:02:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 177 transitions. [2023-11-17 12:02:52,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847826086956522 [2023-11-17 12:02:52,290 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 177 transitions. [2023-11-17 12:02:52,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 177 transitions. [2023-11-17 12:02:52,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:52,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 177 transitions. [2023-11-17 12:02:52,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,294 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,294 INFO L175 Difference]: Start difference. First operand has 244 places, 289 transitions, 3189 flow. Second operand 23 states and 177 transitions. [2023-11-17 12:02:52,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 345 transitions, 4255 flow [2023-11-17 12:02:52,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 345 transitions, 4022 flow, removed 74 selfloop flow, removed 16 redundant places. [2023-11-17 12:02:52,360 INFO L231 Difference]: Finished difference. Result has 257 places, 294 transitions, 3259 flow [2023-11-17 12:02:52,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3259, PETRI_PLACES=257, PETRI_TRANSITIONS=294} [2023-11-17 12:02:52,361 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 237 predicate places. [2023-11-17 12:02:52,361 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 294 transitions, 3259 flow [2023-11-17 12:02:52,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:52,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:52,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 12:02:52,567 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:52,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1597324931, now seen corresponding path program 18 times [2023-11-17 12:02:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949435371] [2023-11-17 12:02:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949435371] [2023-11-17 12:02:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949435371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932219281] [2023-11-17 12:02:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:52,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:52,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:02:52,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:02:52,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:52,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:52,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:53,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:53,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932219281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:53,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:53,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-17 12:02:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205605315] [2023-11-17 12:02:53,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:53,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:02:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:02:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:02:53,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:53,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 294 transitions, 3259 flow. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:53,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:53,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:53,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:55,092 INFO L124 PetriNetUnfolderBase]: 676/1292 cut-off events. [2023-11-17 12:02:55,092 INFO L125 PetriNetUnfolderBase]: For 20473/20473 co-relation queries the response was YES. [2023-11-17 12:02:55,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8708 conditions, 1292 events. 676/1292 cut-off events. For 20473/20473 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7516 event pairs, 76 based on Foata normal form. 3/1275 useless extension candidates. Maximal degree in co-relation 8629. Up to 1010 conditions per place. [2023-11-17 12:02:55,108 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 247 selfloop transitions, 101 changer transitions 16/364 dead transitions. [2023-11-17 12:02:55,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 364 transitions, 4814 flow [2023-11-17 12:02:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:02:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:02:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 202 transitions. [2023-11-17 12:02:55,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404 [2023-11-17 12:02:55,110 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 202 transitions. [2023-11-17 12:02:55,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 202 transitions. [2023-11-17 12:02:55,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:55,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 202 transitions. [2023-11-17 12:02:55,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.08) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,112 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,112 INFO L175 Difference]: Start difference. First operand has 257 places, 294 transitions, 3259 flow. Second operand 25 states and 202 transitions. [2023-11-17 12:02:55,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 364 transitions, 4814 flow [2023-11-17 12:02:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 364 transitions, 4627 flow, removed 61 selfloop flow, removed 15 redundant places. [2023-11-17 12:02:55,236 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 3784 flow [2023-11-17 12:02:55,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3784, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2023-11-17 12:02:55,237 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 246 predicate places. [2023-11-17 12:02:55,237 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 3784 flow [2023-11-17 12:02:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:55,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:55,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 12:02:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 12:02:55,444 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:55,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 989748156, now seen corresponding path program 19 times [2023-11-17 12:02:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127422747] [2023-11-17 12:02:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127422747] [2023-11-17 12:02:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127422747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842537651] [2023-11-17 12:02:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:56,586 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:56,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:02:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:56,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:02:56,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:57,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842537651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:57,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:57,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-17 12:02:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861364341] [2023-11-17 12:02:57,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:02:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:02:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:02:57,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:57,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 3784 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:57,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:57,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:57,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:00,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:03:03,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:03:04,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:03:09,635 INFO L124 PetriNetUnfolderBase]: 733/1407 cut-off events. [2023-11-17 12:03:09,636 INFO L125 PetriNetUnfolderBase]: For 30198/30198 co-relation queries the response was YES. [2023-11-17 12:03:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10703 conditions, 1407 events. 733/1407 cut-off events. For 30198/30198 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8370 event pairs, 72 based on Foata normal form. 4/1391 useless extension candidates. Maximal degree in co-relation 10623. Up to 1026 conditions per place. [2023-11-17 12:03:09,651 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 258 selfloop transitions, 133 changer transitions 17/408 dead transitions. [2023-11-17 12:03:09,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 408 transitions, 6391 flow [2023-11-17 12:03:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:03:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:03:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 262 transitions. [2023-11-17 12:03:09,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2023-11-17 12:03:09,653 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 262 transitions. [2023-11-17 12:03:09,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 262 transitions. [2023-11-17 12:03:09,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:09,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 262 transitions. [2023-11-17 12:03:09,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.9393939393939394) internal successors, (262), 33 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,655 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,656 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 3784 flow. Second operand 33 states and 262 transitions. [2023-11-17 12:03:09,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 408 transitions, 6391 flow [2023-11-17 12:03:09,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 408 transitions, 5509 flow, removed 412 selfloop flow, removed 10 redundant places. [2023-11-17 12:03:09,851 INFO L231 Difference]: Finished difference. Result has 292 places, 338 transitions, 4622 flow [2023-11-17 12:03:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4622, PETRI_PLACES=292, PETRI_TRANSITIONS=338} [2023-11-17 12:03:09,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 272 predicate places. [2023-11-17 12:03:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 338 transitions, 4622 flow [2023-11-17 12:03:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:09,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:09,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 12:03:10,060 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:10,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1090721886, now seen corresponding path program 20 times [2023-11-17 12:03:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77899974] [2023-11-17 12:03:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:10,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:10,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77899974] [2023-11-17 12:03:10,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77899974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:10,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966110371] [2023-11-17 12:03:10,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:03:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:10,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:10,706 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:10,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:03:10,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:10,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:10,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:10,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:11,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966110371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:12,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:12,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-17 12:03:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509659948] [2023-11-17 12:03:12,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:12,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:03:12,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:03:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:03:12,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:12,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 338 transitions, 4622 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:12,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:12,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:12,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:15,933 INFO L124 PetriNetUnfolderBase]: 804/1555 cut-off events. [2023-11-17 12:03:15,933 INFO L125 PetriNetUnfolderBase]: For 39367/39367 co-relation queries the response was YES. [2023-11-17 12:03:15,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12108 conditions, 1555 events. 804/1555 cut-off events. For 39367/39367 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9596 event pairs, 43 based on Foata normal form. 5/1542 useless extension candidates. Maximal degree in co-relation 12020. Up to 1120 conditions per place. [2023-11-17 12:03:15,950 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 328 selfloop transitions, 103 changer transitions 28/459 dead transitions. [2023-11-17 12:03:15,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 459 transitions, 7059 flow [2023-11-17 12:03:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:03:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:03:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 275 transitions. [2023-11-17 12:03:15,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-17 12:03:15,951 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 275 transitions. [2023-11-17 12:03:15,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 275 transitions. [2023-11-17 12:03:15,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:15,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 275 transitions. [2023-11-17 12:03:15,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.333333333333334) internal successors, (275), 33 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,970 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 20.0) internal successors, (680), 34 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,970 INFO L175 Difference]: Start difference. First operand has 292 places, 338 transitions, 4622 flow. Second operand 33 states and 275 transitions. [2023-11-17 12:03:15,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 459 transitions, 7059 flow [2023-11-17 12:03:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 459 transitions, 6136 flow, removed 404 selfloop flow, removed 19 redundant places. [2023-11-17 12:03:16,174 INFO L231 Difference]: Finished difference. Result has 311 places, 363 transitions, 4802 flow [2023-11-17 12:03:16,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4802, PETRI_PLACES=311, PETRI_TRANSITIONS=363} [2023-11-17 12:03:16,175 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2023-11-17 12:03:16,175 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 363 transitions, 4802 flow [2023-11-17 12:03:16,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:16,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:16,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:16,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:03:16,381 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:16,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1657198780, now seen corresponding path program 21 times [2023-11-17 12:03:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:16,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843270219] [2023-11-17 12:03:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:16,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:16,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843270219] [2023-11-17 12:03:16,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843270219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866587738] [2023-11-17 12:03:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:03:16,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:16,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:16,879 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:16,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:03:16,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:03:16,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:16,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:16,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:17,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:17,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866587738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:17,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:17,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-17 12:03:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97533978] [2023-11-17 12:03:17,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:03:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:03:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:03:17,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:17,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 363 transitions, 4802 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:17,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:17,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:17,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:25,109 INFO L124 PetriNetUnfolderBase]: 837/1628 cut-off events. [2023-11-17 12:03:25,109 INFO L125 PetriNetUnfolderBase]: For 44374/44374 co-relation queries the response was YES. [2023-11-17 12:03:25,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12739 conditions, 1628 events. 837/1628 cut-off events. For 44374/44374 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10207 event pairs, 41 based on Foata normal form. 2/1612 useless extension candidates. Maximal degree in co-relation 12645. Up to 1086 conditions per place. [2023-11-17 12:03:25,124 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 321 selfloop transitions, 136 changer transitions 11/468 dead transitions. [2023-11-17 12:03:25,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 468 transitions, 7067 flow [2023-11-17 12:03:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:03:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:03:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 276 transitions. [2023-11-17 12:03:25,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40588235294117647 [2023-11-17 12:03:25,132 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 276 transitions. [2023-11-17 12:03:25,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 276 transitions. [2023-11-17 12:03:25,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:25,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 276 transitions. [2023-11-17 12:03:25,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 8.117647058823529) internal successors, (276), 34 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:25,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 20.0) internal successors, (700), 35 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:25,140 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 20.0) internal successors, (700), 35 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:25,140 INFO L175 Difference]: Start difference. First operand has 311 places, 363 transitions, 4802 flow. Second operand 34 states and 276 transitions. [2023-11-17 12:03:25,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 468 transitions, 7067 flow [2023-11-17 12:03:25,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 468 transitions, 6420 flow, removed 285 selfloop flow, removed 17 redundant places. [2023-11-17 12:03:25,334 INFO L231 Difference]: Finished difference. Result has 332 places, 382 transitions, 5193 flow [2023-11-17 12:03:25,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5193, PETRI_PLACES=332, PETRI_TRANSITIONS=382} [2023-11-17 12:03:25,337 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 312 predicate places. [2023-11-17 12:03:25,337 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 382 transitions, 5193 flow [2023-11-17 12:03:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:25,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:25,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:25,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 12:03:25,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:03:25,542 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:25,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -801094813, now seen corresponding path program 4 times [2023-11-17 12:03:25,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:25,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194543218] [2023-11-17 12:03:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:25,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:25,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194543218] [2023-11-17 12:03:25,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194543218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:25,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971360806] [2023-11-17 12:03:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:03:25,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:25,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:25,723 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:25,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:03:25,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:03:25,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:25,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:03:25,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:25,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:26,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971360806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:26,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:26,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-11-17 12:03:26,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132904962] [2023-11-17 12:03:26,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:26,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:03:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:03:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:03:26,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:26,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 382 transitions, 5193 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:26,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:26,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:26,926 INFO L124 PetriNetUnfolderBase]: 833/1635 cut-off events. [2023-11-17 12:03:26,927 INFO L125 PetriNetUnfolderBase]: For 41022/41022 co-relation queries the response was YES. [2023-11-17 12:03:26,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12515 conditions, 1635 events. 833/1635 cut-off events. For 41022/41022 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10371 event pairs, 58 based on Foata normal form. 3/1620 useless extension candidates. Maximal degree in co-relation 12419. Up to 1385 conditions per place. [2023-11-17 12:03:26,940 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 345 selfloop transitions, 70 changer transitions 19/434 dead transitions. [2023-11-17 12:03:26,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 434 transitions, 6407 flow [2023-11-17 12:03:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:03:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:03:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 161 transitions. [2023-11-17 12:03:26,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2023-11-17 12:03:26,941 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 161 transitions. [2023-11-17 12:03:26,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 161 transitions. [2023-11-17 12:03:26,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:26,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 161 transitions. [2023-11-17 12:03:26,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:26,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:26,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:26,942 INFO L175 Difference]: Start difference. First operand has 332 places, 382 transitions, 5193 flow. Second operand 19 states and 161 transitions. [2023-11-17 12:03:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 434 transitions, 6407 flow [2023-11-17 12:03:27,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 434 transitions, 5863 flow, removed 219 selfloop flow, removed 21 redundant places. [2023-11-17 12:03:27,140 INFO L231 Difference]: Finished difference. Result has 331 places, 380 transitions, 4860 flow [2023-11-17 12:03:27,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4860, PETRI_PLACES=331, PETRI_TRANSITIONS=380} [2023-11-17 12:03:27,141 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 311 predicate places. [2023-11-17 12:03:27,141 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 380 transitions, 4860 flow [2023-11-17 12:03:27,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:27,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:27,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:27,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:27,345 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:27,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash 688310183, now seen corresponding path program 5 times [2023-11-17 12:03:27,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:27,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106797010] [2023-11-17 12:03:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:27,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106797010] [2023-11-17 12:03:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106797010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599970166] [2023-11-17 12:03:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:27,514 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:27,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:03:27,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:03:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:27,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:03:27,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:27,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599970166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:27,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:27,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-11-17 12:03:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667866493] [2023-11-17 12:03:27,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:03:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:03:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:03:27,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:27,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 380 transitions, 4860 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:27,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:27,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:27,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:29,425 INFO L124 PetriNetUnfolderBase]: 832/1634 cut-off events. [2023-11-17 12:03:29,426 INFO L125 PetriNetUnfolderBase]: For 35586/35586 co-relation queries the response was YES. [2023-11-17 12:03:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12147 conditions, 1634 events. 832/1634 cut-off events. For 35586/35586 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10360 event pairs, 66 based on Foata normal form. 7/1623 useless extension candidates. Maximal degree in co-relation 12048. Up to 1327 conditions per place. [2023-11-17 12:03:29,439 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 335 selfloop transitions, 49 changer transitions 48/432 dead transitions. [2023-11-17 12:03:29,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 432 transitions, 6332 flow [2023-11-17 12:03:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:03:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:03:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 143 transitions. [2023-11-17 12:03:29,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058823529411765 [2023-11-17 12:03:29,441 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 143 transitions. [2023-11-17 12:03:29,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 143 transitions. [2023-11-17 12:03:29,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:29,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 143 transitions. [2023-11-17 12:03:29,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:29,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:29,442 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:29,442 INFO L175 Difference]: Start difference. First operand has 331 places, 380 transitions, 4860 flow. Second operand 17 states and 143 transitions. [2023-11-17 12:03:29,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 432 transitions, 6332 flow [2023-11-17 12:03:29,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 432 transitions, 6144 flow, removed 34 selfloop flow, removed 16 redundant places. [2023-11-17 12:03:29,611 INFO L231 Difference]: Finished difference. Result has 332 places, 357 transitions, 4438 flow [2023-11-17 12:03:29,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4438, PETRI_PLACES=332, PETRI_TRANSITIONS=357} [2023-11-17 12:03:29,612 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 312 predicate places. [2023-11-17 12:03:29,612 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 357 transitions, 4438 flow [2023-11-17 12:03:29,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:29,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:29,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:29,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:29,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 12:03:29,817 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:29,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:29,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1881074194, now seen corresponding path program 22 times [2023-11-17 12:03:29,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:29,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731344321] [2023-11-17 12:03:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:29,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731344321] [2023-11-17 12:03:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731344321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654887398] [2023-11-17 12:03:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:03:30,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:30,209 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:30,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:03:30,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:03:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:30,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:30,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654887398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:31,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:03:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55253705] [2023-11-17 12:03:31,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:03:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:03:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:03:31,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:31,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 357 transitions, 4438 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:31,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:31,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:31,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:35,591 INFO L124 PetriNetUnfolderBase]: 832/1606 cut-off events. [2023-11-17 12:03:35,591 INFO L125 PetriNetUnfolderBase]: For 38188/38188 co-relation queries the response was YES. [2023-11-17 12:03:35,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12003 conditions, 1606 events. 832/1606 cut-off events. For 38188/38188 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 9940 event pairs, 85 based on Foata normal form. 4/1592 useless extension candidates. Maximal degree in co-relation 11906. Up to 1373 conditions per place. [2023-11-17 12:03:35,608 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 339 selfloop transitions, 78 changer transitions 15/432 dead transitions. [2023-11-17 12:03:35,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 432 transitions, 6043 flow [2023-11-17 12:03:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:03:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:03:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 191 transitions. [2023-11-17 12:03:35,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39791666666666664 [2023-11-17 12:03:35,631 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 191 transitions. [2023-11-17 12:03:35,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 191 transitions. [2023-11-17 12:03:35,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:35,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 191 transitions. [2023-11-17 12:03:35,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,633 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,633 INFO L175 Difference]: Start difference. First operand has 332 places, 357 transitions, 4438 flow. Second operand 24 states and 191 transitions. [2023-11-17 12:03:35,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 432 transitions, 6043 flow [2023-11-17 12:03:35,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 432 transitions, 5689 flow, removed 143 selfloop flow, removed 23 redundant places. [2023-11-17 12:03:35,867 INFO L231 Difference]: Finished difference. Result has 322 places, 376 transitions, 4769 flow [2023-11-17 12:03:35,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4769, PETRI_PLACES=322, PETRI_TRANSITIONS=376} [2023-11-17 12:03:35,869 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 302 predicate places. [2023-11-17 12:03:35,870 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 376 transitions, 4769 flow [2023-11-17 12:03:35,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:35,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:35,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:36,078 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:36,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -796166495, now seen corresponding path program 23 times [2023-11-17 12:03:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:36,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664082324] [2023-11-17 12:03:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:36,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664082324] [2023-11-17 12:03:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664082324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365052342] [2023-11-17 12:03:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:36,932 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:36,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:03:37,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:37,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:37,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:37,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365052342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:38,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:38,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-17 12:03:38,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296430303] [2023-11-17 12:03:38,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:03:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:03:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:03:38,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:38,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 376 transitions, 4769 flow. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:38,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:38,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:38,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:41,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:03:43,522 INFO L124 PetriNetUnfolderBase]: 845/1628 cut-off events. [2023-11-17 12:03:43,522 INFO L125 PetriNetUnfolderBase]: For 34640/34640 co-relation queries the response was YES. [2023-11-17 12:03:43,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11894 conditions, 1628 events. 845/1628 cut-off events. For 34640/34640 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10094 event pairs, 46 based on Foata normal form. 5/1615 useless extension candidates. Maximal degree in co-relation 11799. Up to 1260 conditions per place. [2023-11-17 12:03:43,541 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 320 selfloop transitions, 116 changer transitions 18/454 dead transitions. [2023-11-17 12:03:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 454 transitions, 6078 flow [2023-11-17 12:03:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:03:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:03:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 219 transitions. [2023-11-17 12:03:43,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2023-11-17 12:03:43,543 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 219 transitions. [2023-11-17 12:03:43,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 219 transitions. [2023-11-17 12:03:43,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:43,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 219 transitions. [2023-11-17 12:03:43,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.11111111111111) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:43,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:43,545 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:43,545 INFO L175 Difference]: Start difference. First operand has 322 places, 376 transitions, 4769 flow. Second operand 27 states and 219 transitions. [2023-11-17 12:03:43,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 454 transitions, 6078 flow [2023-11-17 12:03:43,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 454 transitions, 5801 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-11-17 12:03:43,867 INFO L231 Difference]: Finished difference. Result has 337 places, 383 transitions, 4875 flow [2023-11-17 12:03:43,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4875, PETRI_PLACES=337, PETRI_TRANSITIONS=383} [2023-11-17 12:03:43,868 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2023-11-17 12:03:43,869 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 383 transitions, 4875 flow [2023-11-17 12:03:43,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:43,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:43,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:43,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 12:03:44,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:44,075 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:44,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1896841118, now seen corresponding path program 24 times [2023-11-17 12:03:44,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:44,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001958430] [2023-11-17 12:03:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:44,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001958430] [2023-11-17 12:03:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001958430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404808759] [2023-11-17 12:03:45,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:03:45,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:45,044 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:45,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:03:45,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:03:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:45,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:45,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:45,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:46,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404808759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:46,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:46,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:03:46,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588214601] [2023-11-17 12:03:46,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:46,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:03:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:03:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:03:46,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:46,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 383 transitions, 4875 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:46,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:46,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:46,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:51,212 INFO L124 PetriNetUnfolderBase]: 894/1707 cut-off events. [2023-11-17 12:03:51,213 INFO L125 PetriNetUnfolderBase]: For 48439/48439 co-relation queries the response was YES. [2023-11-17 12:03:51,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 1707 events. 894/1707 cut-off events. For 48439/48439 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10583 event pairs, 88 based on Foata normal form. 2/1689 useless extension candidates. Maximal degree in co-relation 13434. Up to 1358 conditions per place. [2023-11-17 12:03:51,233 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 326 selfloop transitions, 135 changer transitions 10/471 dead transitions. [2023-11-17 12:03:51,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 471 transitions, 7219 flow [2023-11-17 12:03:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:03:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:03:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 239 transitions. [2023-11-17 12:03:51,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983333333333333 [2023-11-17 12:03:51,235 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 239 transitions. [2023-11-17 12:03:51,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 239 transitions. [2023-11-17 12:03:51,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:51,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 239 transitions. [2023-11-17 12:03:51,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:51,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 20.0) internal successors, (620), 31 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:51,237 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 20.0) internal successors, (620), 31 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:51,237 INFO L175 Difference]: Start difference. First operand has 337 places, 383 transitions, 4875 flow. Second operand 30 states and 239 transitions. [2023-11-17 12:03:51,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 471 transitions, 7219 flow [2023-11-17 12:03:51,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 471 transitions, 7059 flow, removed 33 selfloop flow, removed 18 redundant places. [2023-11-17 12:03:51,526 INFO L231 Difference]: Finished difference. Result has 349 places, 408 transitions, 5946 flow [2023-11-17 12:03:51,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5946, PETRI_PLACES=349, PETRI_TRANSITIONS=408} [2023-11-17 12:03:51,528 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-11-17 12:03:51,528 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 408 transitions, 5946 flow [2023-11-17 12:03:51,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:51,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:51,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:51,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-17 12:03:51,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-17 12:03:51,735 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:51,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1621773892, now seen corresponding path program 25 times [2023-11-17 12:03:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:51,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548810258] [2023-11-17 12:03:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:52,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548810258] [2023-11-17 12:03:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548810258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459779279] [2023-11-17 12:03:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:03:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:52,475 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:52,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:03:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:52,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:03:52,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:52,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459779279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:54,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:54,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:03:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435335306] [2023-11-17 12:03:54,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:54,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:03:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:03:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:03:54,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:54,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 408 transitions, 5946 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:54,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:54,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:57,516 INFO L124 PetriNetUnfolderBase]: 907/1737 cut-off events. [2023-11-17 12:03:57,516 INFO L125 PetriNetUnfolderBase]: For 54264/54264 co-relation queries the response was YES. [2023-11-17 12:03:57,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14563 conditions, 1737 events. 907/1737 cut-off events. For 54264/54264 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 10870 event pairs, 104 based on Foata normal form. 3/1726 useless extension candidates. Maximal degree in co-relation 14463. Up to 1516 conditions per place. [2023-11-17 12:03:57,535 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 347 selfloop transitions, 104 changer transitions 12/463 dead transitions. [2023-11-17 12:03:57,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 463 transitions, 7789 flow [2023-11-17 12:03:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:03:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:03:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 194 transitions. [2023-11-17 12:03:57,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730769230769231 [2023-11-17 12:03:57,536 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 194 transitions. [2023-11-17 12:03:57,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 194 transitions. [2023-11-17 12:03:57,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:57,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 194 transitions. [2023-11-17 12:03:57,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.461538461538462) internal successors, (194), 26 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:57,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:57,537 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:57,537 INFO L175 Difference]: Start difference. First operand has 349 places, 408 transitions, 5946 flow. Second operand 26 states and 194 transitions. [2023-11-17 12:03:57,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 463 transitions, 7789 flow [2023-11-17 12:03:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 463 transitions, 7067 flow, removed 310 selfloop flow, removed 24 redundant places. [2023-11-17 12:03:57,788 INFO L231 Difference]: Finished difference. Result has 355 places, 417 transitions, 6073 flow [2023-11-17 12:03:57,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6073, PETRI_PLACES=355, PETRI_TRANSITIONS=417} [2023-11-17 12:03:57,789 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-11-17 12:03:57,789 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 417 transitions, 6073 flow [2023-11-17 12:03:57,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:57,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:57,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 12:03:57,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-17 12:03:57,994 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:57,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:57,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1351694658, now seen corresponding path program 5 times [2023-11-17 12:03:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:57,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506430892] [2023-11-17 12:03:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:57,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506430892] [2023-11-17 12:03:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506430892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:58,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219873840] [2023-11-17 12:03:58,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:58,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:58,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:58,198 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:58,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:03:58,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:03:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:58,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:03:58,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:59,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:06,029 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_~x_1~0 4294967296))) (let ((.cse0 (+ .cse7 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse4 v_z_316)) (.cse2 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse1) (< 4294967295 v_z_316) (< .cse2 0) (< .cse1 4294967296) (< .cse3 .cse2)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse5 (+ .cse4 v_z_316)) (.cse6 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse5) (< 4294967295 v_z_316) (< .cse6 0) (= .cse7 .cse5) (< v_z_316 0) (< .cse3 .cse6)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse9 (+ .cse4 v_z_316)) (.cse8 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (< .cse8 0) (= .cse7 .cse9) (< 4294967295 .cse9) (< v_z_316 0) (< .cse3 .cse8))))))) is different from false [2023-11-17 12:04:22,337 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse3 (+ .cse0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse2 v_z_316))) (or (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse1) (< 4294967295 .cse1) (< v_z_316 0)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse4 (+ .cse2 v_z_316))) (or (= .cse3 .cse4) (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse4) (< v_z_316 0)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse5 (+ .cse2 v_z_316))) (or (= .cse3 .cse5) (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (< .cse5 4294967296))))))) is different from false [2023-11-17 12:04:56,892 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse2 v_z_316))) (or (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse1) (< 4294967295 .cse1) (< v_z_316 0)))) (forall ((v_y_316 Int) (v_z_316 Int)) (or (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 (+ .cse2 v_z_316)) (< v_z_316 0))))) is different from false [2023-11-17 12:04:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:58,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219873840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:58,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:58,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2023-11-17 12:04:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267365755] [2023-11-17 12:04:58,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:04:59,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:04:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=174, Unknown=5, NotChecked=90, Total=342 [2023-11-17 12:04:59,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:04:59,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 417 transitions, 6073 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:59,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:59,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:04:59,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:01,034 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse2 v_z_316))) (or (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse1) (< 4294967295 .cse1) (< v_z_316 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_y_316 Int) (v_z_316 Int)) (or (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 (+ .cse2 v_z_316)) (< v_z_316 0))))) is different from false [2023-11-17 12:05:03,059 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse3 (+ .cse0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse2 v_z_316))) (or (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse1) (< 4294967295 .cse1) (< v_z_316 0)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse4 (+ .cse2 v_z_316))) (or (= .cse3 .cse4) (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (= .cse0 .cse4) (< v_z_316 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse5 (+ .cse2 v_z_316))) (or (= .cse3 .cse5) (< 4294967295 v_z_316) (not (= (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)) 0)) (< .cse5 4294967296))))))) is different from false [2023-11-17 12:05:05,161 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_~x_1~0 4294967296))) (let ((.cse0 (+ .cse7 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse4 v_z_316)) (.cse2 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse1) (< 4294967295 v_z_316) (< .cse2 0) (< .cse1 4294967296) (< .cse3 .cse2)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse5 (+ .cse4 v_z_316)) (.cse6 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse5) (< 4294967295 v_z_316) (< .cse6 0) (= .cse7 .cse5) (< v_z_316 0) (< .cse3 .cse6)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse9 (+ .cse4 v_z_316)) (.cse8 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (< .cse8 0) (= .cse7 .cse9) (< 4294967295 .cse9) (< v_z_316 0) (< .cse3 .cse8)))) (= c_~x_1~0 0)))) is different from false [2023-11-17 12:05:07,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:09,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:11,266 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (or (let ((.cse7 (mod c_~x_1~0 4294967296))) (let ((.cse0 (+ .cse7 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse1 (+ .cse4 v_z_316)) (.cse2 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse1) (< 4294967295 v_z_316) (< .cse2 0) (< .cse1 4294967296) (< .cse3 .cse2)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse5 (+ .cse4 v_z_316)) (.cse6 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (= .cse0 .cse5) (< 4294967295 v_z_316) (< .cse6 0) (= .cse7 .cse5) (< v_z_316 0) (< .cse3 .cse6)))) (forall ((v_y_316 Int) (v_z_316 Int)) (let ((.cse9 (+ .cse4 v_z_316)) (.cse8 (+ (* v_y_316 4294967296) (* 2863311531 v_z_316)))) (or (< .cse8 0) (= .cse7 .cse9) (< 4294967295 .cse9) (< v_z_316 0) (< .cse3 .cse8))))))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296))) (= c_~x_1~0 0)) is different from false [2023-11-17 12:05:13,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:15,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:17,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:25,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:25,987 INFO L124 PetriNetUnfolderBase]: 967/1842 cut-off events. [2023-11-17 12:05:25,987 INFO L125 PetriNetUnfolderBase]: For 50409/50409 co-relation queries the response was YES. [2023-11-17 12:05:26,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15388 conditions, 1842 events. 967/1842 cut-off events. For 50409/50409 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 11607 event pairs, 106 based on Foata normal form. 2/1832 useless extension candidates. Maximal degree in co-relation 15285. Up to 1732 conditions per place. [2023-11-17 12:05:26,019 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 442 selfloop transitions, 32 changer transitions 3/477 dead transitions. [2023-11-17 12:05:26,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 477 transitions, 7979 flow [2023-11-17 12:05:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:05:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:05:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 121 transitions. [2023-11-17 12:05:26,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2023-11-17 12:05:26,020 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 121 transitions. [2023-11-17 12:05:26,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 121 transitions. [2023-11-17 12:05:26,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:26,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 121 transitions. [2023-11-17 12:05:26,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.066666666666666) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:26,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:26,022 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:26,022 INFO L175 Difference]: Start difference. First operand has 355 places, 417 transitions, 6073 flow. Second operand 15 states and 121 transitions. [2023-11-17 12:05:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 477 transitions, 7979 flow [2023-11-17 12:05:26,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 477 transitions, 7636 flow, removed 118 selfloop flow, removed 19 redundant places. [2023-11-17 12:05:26,444 INFO L231 Difference]: Finished difference. Result has 359 places, 446 transitions, 6497 flow [2023-11-17 12:05:26,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6497, PETRI_PLACES=359, PETRI_TRANSITIONS=446} [2023-11-17 12:05:26,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 339 predicate places. [2023-11-17 12:05:26,445 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 446 transitions, 6497 flow [2023-11-17 12:05:26,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:26,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:26,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:26,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 12:05:26,663 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:05:26,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 364855619, now seen corresponding path program 26 times [2023-11-17 12:05:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:26,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891211820] [2023-11-17 12:05:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:26,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:27,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:27,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891211820] [2023-11-17 12:05:27,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891211820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:27,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082753733] [2023-11-17 12:05:27,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:05:27,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:27,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:27,421 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:05:27,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:05:27,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:05:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:27,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:05:27,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:27,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:32,145 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) (.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1)) (.cse6 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse4 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse5 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296))) (and (or (< (+ .cse0 .cse1) 4294967296) (forall ((v_z_321 Int)) (or (< v_z_321 .cse2) (let ((.cse3 (* 2 v_z_321))) (< (+ c_~x_2~0 .cse3 4294967294 .cse4) (+ (* (div (+ c_~x_2~0 .cse3) 4294967296) 4294967296) .cse5 c_~x_1~0))) (< .cse6 v_z_321)))) (forall ((v_z_321 Int)) (or (< v_z_321 .cse2) (let ((.cse7 (* 2 v_z_321))) (< (+ (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) c_~x_1~0 .cse1) (+ c_~x_2~0 .cse7 4294967297 .cse4))) (< .cse6 v_z_321))) (or (forall ((v_z_321 Int)) (or (< v_z_321 .cse2) (< .cse6 v_z_321) (let ((.cse8 (* 2 v_z_321))) (< (+ (* (div (+ c_~x_2~0 .cse8) 4294967296) 4294967296) c_~x_1~0 .cse1) (+ c_~x_2~0 .cse8 .cse4 1))))) (< 4294967294 (+ .cse0 .cse5))) (forall ((v_z_321 Int)) (or (< v_z_321 .cse2) (< .cse6 v_z_321) (let ((.cse9 (* 2 v_z_321))) (< (+ c_~x_2~0 .cse9 .cse4) (+ (* (div (+ c_~x_2~0 .cse9) 4294967296) 4294967296) .cse5 c_~x_1~0 2))))))) is different from false [2023-11-17 12:05:34,243 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_~x_1~0 4294967296)) (.cse0 (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse3 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (forall ((v_z_321 Int)) (or (< v_z_321 .cse0) (let ((.cse1 (* 2 v_z_321))) (< (+ c_~x_2~0 .cse1 .cse2) (+ (* (div (+ c_~x_2~0 .cse1) 4294967296) 4294967296) c_~x_1~0 3))) (< .cse3 v_z_321))) (or (< 4294967293 .cse4) (forall ((v_z_321 Int)) (or (< v_z_321 .cse0) (< .cse3 v_z_321) (let ((.cse5 (* 2 v_z_321))) (< (+ (* (div (+ c_~x_2~0 .cse5) 4294967296) 4294967296) c_~x_1~0 1) (+ c_~x_2~0 .cse5 .cse2)))))) (forall ((v_z_321 Int)) (or (< v_z_321 .cse0) (< .cse3 v_z_321) (let ((.cse6 (* 2 v_z_321))) (< (+ (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296) c_~x_1~0) (+ c_~x_2~0 .cse6 4294967295 .cse2))))) (or (< .cse4 4294967294) (forall ((v_z_321 Int)) (or (< v_z_321 .cse0) (let ((.cse7 (* 2 v_z_321))) (< (+ c_~x_2~0 .cse7 .cse2 4294967293) (+ (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) c_~x_1~0))) (< .cse3 v_z_321)))))) is different from false [2023-11-17 12:05:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-17 12:05:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082753733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:34,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:05:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297236009] [2023-11-17 12:05:34,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:05:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:05:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=245, Unknown=2, NotChecked=66, Total=380 [2023-11-17 12:05:34,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:05:34,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 446 transitions, 6497 flow. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:34,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:34,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:05:34,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:36,321 INFO L124 PetriNetUnfolderBase]: 992/1895 cut-off events. [2023-11-17 12:05:36,322 INFO L125 PetriNetUnfolderBase]: For 56569/56569 co-relation queries the response was YES. [2023-11-17 12:05:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16487 conditions, 1895 events. 992/1895 cut-off events. For 56569/56569 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 12004 event pairs, 222 based on Foata normal form. 2/1885 useless extension candidates. Maximal degree in co-relation 16374. Up to 1738 conditions per place. [2023-11-17 12:05:36,343 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 417 selfloop transitions, 64 changer transitions 10/491 dead transitions. [2023-11-17 12:05:36,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 491 transitions, 7923 flow [2023-11-17 12:05:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:05:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:05:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 146 transitions. [2023-11-17 12:05:36,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38421052631578945 [2023-11-17 12:05:36,345 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 146 transitions. [2023-11-17 12:05:36,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 146 transitions. [2023-11-17 12:05:36,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:36,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 146 transitions. [2023-11-17 12:05:36,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:36,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:36,346 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:36,346 INFO L175 Difference]: Start difference. First operand has 359 places, 446 transitions, 6497 flow. Second operand 19 states and 146 transitions. [2023-11-17 12:05:36,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 491 transitions, 7923 flow [2023-11-17 12:05:36,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 491 transitions, 7813 flow, removed 53 selfloop flow, removed 1 redundant places. [2023-11-17 12:05:36,625 INFO L231 Difference]: Finished difference. Result has 382 places, 454 transitions, 6737 flow [2023-11-17 12:05:36,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6387, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6737, PETRI_PLACES=382, PETRI_TRANSITIONS=454} [2023-11-17 12:05:36,626 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 362 predicate places. [2023-11-17 12:05:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 454 transitions, 6737 flow [2023-11-17 12:05:36,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:36,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:36,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:36,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:36,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:36,832 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:05:36,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1326113596, now seen corresponding path program 6 times [2023-11-17 12:05:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:36,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264040881] [2023-11-17 12:05:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:36,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:37,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264040881] [2023-11-17 12:05:37,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264040881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:37,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911185824] [2023-11-17 12:05:37,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:05:37,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:37,021 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:05:37,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:05:37,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:05:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:37,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:05:37,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:39,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:42,581 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x_1~0 4294967296))) (let ((.cse1 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (+ .cse6 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse0 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse3 (+ .cse4 v_z_325))) (or (< .cse0 0) (< .cse1 .cse0) (< 4294967295 v_z_325) (= .cse2 .cse3) (< .cse3 4294967296)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse5 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse7 (+ .cse4 v_z_325))) (or (< .cse5 0) (< .cse1 .cse5) (< v_z_325 0) (= .cse6 .cse7) (< 4294967295 .cse7)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse8 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse9 (+ .cse4 v_z_325))) (or (< .cse8 0) (< .cse1 .cse8) (< 4294967295 v_z_325) (< v_z_325 0) (= .cse2 .cse9) (= .cse6 .cse9))))))) is different from false [2023-11-17 12:05:59,144 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (or (< 4294967295 v_z_325) (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 (+ .cse1 v_z_325)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse2 (+ .cse1 v_z_325))) (or (< 4294967295 v_z_325) (= (+ .cse0 4294967296) .cse2) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (< .cse2 4294967296)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse3 (+ .cse1 v_z_325))) (or (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 .cse3) (< 4294967295 .cse3)))))) is different from false [2023-11-17 12:06:01,519 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (or (< 4294967295 v_z_325) (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 (+ .cse1 v_z_325)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse2 (+ .cse1 v_z_325))) (or (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 .cse2) (< 4294967295 .cse2)))))) is different from false [2023-11-17 12:06:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-17 12:06:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911185824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:07,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:07,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-11-17 12:06:07,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461167317] [2023-11-17 12:06:07,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:06:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:06:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=130, Unknown=4, NotChecked=78, Total=272 [2023-11-17 12:06:07,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:06:07,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 454 transitions, 6737 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:07,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:07,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:06:07,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:09,358 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (or (< 4294967295 v_z_325) (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 (+ .cse1 v_z_325)))) (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse2 (+ .cse1 v_z_325))) (or (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 .cse2) (< 4294967295 .cse2)))))) is different from false [2023-11-17 12:06:11,385 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (or (< 4294967295 v_z_325) (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 (+ .cse1 v_z_325)))) (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse2 (+ .cse1 v_z_325))) (or (< 4294967295 v_z_325) (= (+ .cse0 4294967296) .cse2) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (< .cse2 4294967296)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse3 (+ .cse1 v_z_325))) (or (< v_z_325 0) (not (= (+ (* v_y_325 4294967296) (* 2863311531 v_z_325)) 0)) (= .cse0 .cse3) (< 4294967295 .cse3)))))) is different from false [2023-11-17 12:06:13,438 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x_1~0 4294967296))) (let ((.cse1 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (+ .cse6 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse0 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse3 (+ .cse4 v_z_325))) (or (< .cse0 0) (< .cse1 .cse0) (< 4294967295 v_z_325) (= .cse2 .cse3) (< .cse3 4294967296)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse5 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse7 (+ .cse4 v_z_325))) (or (< .cse5 0) (< .cse1 .cse5) (< v_z_325 0) (= .cse6 .cse7) (< 4294967295 .cse7)))) (forall ((v_z_325 Int) (v_y_325 Int)) (let ((.cse8 (+ (* v_y_325 4294967296) (* 2863311531 v_z_325))) (.cse9 (+ .cse4 v_z_325))) (or (< .cse8 0) (< .cse1 .cse8) (< 4294967295 v_z_325) (< v_z_325 0) (= .cse2 .cse9) (= .cse6 .cse9))))))) is different from false [2023-11-17 12:06:14,948 INFO L124 PetriNetUnfolderBase]: 1047/2013 cut-off events. [2023-11-17 12:06:14,948 INFO L125 PetriNetUnfolderBase]: For 69632/69632 co-relation queries the response was YES. [2023-11-17 12:06:14,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18340 conditions, 2013 events. 1047/2013 cut-off events. For 69632/69632 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 12985 event pairs, 344 based on Foata normal form. 2/2003 useless extension candidates. Maximal degree in co-relation 18220. Up to 1806 conditions per place. [2023-11-17 12:06:14,987 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 462 selfloop transitions, 51 changer transitions 3/516 dead transitions. [2023-11-17 12:06:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 516 transitions, 8963 flow [2023-11-17 12:06:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:06:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:06:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 110 transitions. [2023-11-17 12:06:14,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2023-11-17 12:06:14,989 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 110 transitions. [2023-11-17 12:06:14,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 110 transitions. [2023-11-17 12:06:14,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:14,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 110 transitions. [2023-11-17 12:06:14,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:14,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:14,990 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:14,990 INFO L175 Difference]: Start difference. First operand has 382 places, 454 transitions, 6737 flow. Second operand 13 states and 110 transitions. [2023-11-17 12:06:14,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 516 transitions, 8963 flow [2023-11-17 12:06:15,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 516 transitions, 8790 flow, removed 48 selfloop flow, removed 12 redundant places. [2023-11-17 12:06:15,493 INFO L231 Difference]: Finished difference. Result has 390 places, 487 transitions, 7583 flow [2023-11-17 12:06:15,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7583, PETRI_PLACES=390, PETRI_TRANSITIONS=487} [2023-11-17 12:06:15,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 370 predicate places. [2023-11-17 12:06:15,495 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 487 transitions, 7583 flow [2023-11-17 12:06:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:15,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:15,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:15,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:06:15,703 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:06:15,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 865262526, now seen corresponding path program 7 times [2023-11-17 12:06:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:15,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051628456] [2023-11-17 12:06:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:15,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:15,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051628456] [2023-11-17 12:06:15,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051628456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:15,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817237725] [2023-11-17 12:06:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:06:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:15,941 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:06:15,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:06:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:16,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:06:16,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:18,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:03,115 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (or (< 4294967295 v_z_328) (= .cse0 (+ .cse1 v_z_328)) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse2 (+ .cse1 v_z_328))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))))) is different from false [2023-11-17 12:07:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:08,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817237725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:08,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:08,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-11-17 12:07:08,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052302188] [2023-11-17 12:07:08,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:08,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:08,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=339, Unknown=14, NotChecked=40, Total=506 [2023-11-17 12:07:08,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:07:08,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 487 transitions, 7583 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:08,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:08,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:07:08,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:10,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:13,025 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (or (< 4294967295 v_z_328) (= .cse0 (+ .cse1 v_z_328)) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse2 (+ .cse1 v_z_328))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0))) is different from false [2023-11-17 12:07:15,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:17,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:19,315 WARN L854 $PredicateComparison]: unable to prove that (and (or (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (or (< 4294967295 v_z_328) (= .cse0 (+ .cse1 v_z_328)) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse2 (+ .cse1 v_z_328))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))))) (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 3) 4294967296) (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1))) (= c_~x_2~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-11-17 12:07:21,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:23,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:25,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:27,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:29,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:31,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:34,036 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (or (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse5 (+ .cse0 4294967296)) (.cse2 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse4 v_z_328)) (.cse3 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (< .cse2 .cse3) (< .cse3 0) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse6 (+ .cse4 v_z_328)) (.cse7 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse6) (< .cse6 4294967296) (< .cse2 .cse7) (< .cse7 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse8 (+ .cse4 v_z_328)) (.cse9 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse8) (= .cse0 .cse8) (< .cse2 .cse9) (< .cse9 0) (< v_z_328 0))))))) (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 3) 4294967296) (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1))) (= c_~x_1~0 0)) is different from false [2023-11-17 12:07:36,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:38,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:40,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:42,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:47,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:49,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:51,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:55,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:07:58,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:00,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:02,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:06,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:09,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:11,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:13,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:15,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:17,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:19,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:21,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:23,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:25,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:27,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:29,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:31,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:34,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:08:34,164 INFO L124 PetriNetUnfolderBase]: 1238/2361 cut-off events. [2023-11-17 12:08:34,164 INFO L125 PetriNetUnfolderBase]: For 124082/124082 co-relation queries the response was YES. [2023-11-17 12:08:34,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25121 conditions, 2361 events. 1238/2361 cut-off events. For 124082/124082 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 15519 event pairs, 241 based on Foata normal form. 2/2349 useless extension candidates. Maximal degree in co-relation 24992. Up to 1922 conditions per place. [2023-11-17 12:08:34,193 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 479 selfloop transitions, 117 changer transitions 12/608 dead transitions. [2023-11-17 12:08:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 608 transitions, 11816 flow [2023-11-17 12:08:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:08:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:08:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 164 transitions. [2023-11-17 12:08:34,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2023-11-17 12:08:34,194 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 164 transitions. [2023-11-17 12:08:34,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 164 transitions. [2023-11-17 12:08:34,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:34,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 164 transitions. [2023-11-17 12:08:34,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:34,195 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:34,195 INFO L175 Difference]: Start difference. First operand has 390 places, 487 transitions, 7583 flow. Second operand 21 states and 164 transitions. [2023-11-17 12:08:34,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 608 transitions, 11816 flow [2023-11-17 12:08:34,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 608 transitions, 11418 flow, removed 196 selfloop flow, removed 1 redundant places. [2023-11-17 12:08:34,758 INFO L231 Difference]: Finished difference. Result has 425 places, 557 transitions, 9994 flow [2023-11-17 12:08:34,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9994, PETRI_PLACES=425, PETRI_TRANSITIONS=557} [2023-11-17 12:08:34,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 405 predicate places. [2023-11-17 12:08:34,759 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 557 transitions, 9994 flow [2023-11-17 12:08:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:34,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:34,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:34,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 12:08:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:08:34,965 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:34,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1858040924, now seen corresponding path program 8 times [2023-11-17 12:08:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:34,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540810558] [2023-11-17 12:08:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:35,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540810558] [2023-11-17 12:08:35,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540810558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:35,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210793011] [2023-11-17 12:08:35,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:08:35,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:35,145 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:08:35,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:08:35,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:08:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:08:35,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:08:35,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:35,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:09:25,712 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse1 (+ .cse2 v_z_334))) (or (< 4294967295 v_z_334) (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= (+ .cse0 4294967296) .cse1) (= .cse0 .cse1) (< v_z_334 0)))) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse3 (+ .cse2 v_z_334))) (or (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 .cse3) (< v_z_334 0) (< 4294967295 .cse3)))))) is different from false [2023-11-17 12:09:42,776 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_334 Int) (v_y_334 Int)) (or (< 4294967295 v_z_334) (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 (+ .cse1 v_z_334)) (< v_z_334 0))) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse2 (+ .cse1 v_z_334))) (or (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 .cse2) (< v_z_334 0) (< 4294967295 .cse2)))))) is different from false [2023-11-17 12:09:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210793011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:09:42,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:09:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 18 [2023-11-17 12:09:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430635475] [2023-11-17 12:09:42,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:09:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:09:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:09:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:09:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=220, Unknown=12, NotChecked=66, Total=380 [2023-11-17 12:09:42,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:09:42,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 557 transitions, 9994 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:42,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:09:42,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:09:42,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:09:44,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:09:46,957 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_334 Int) (v_y_334 Int)) (or (< 4294967295 v_z_334) (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 (+ .cse1 v_z_334)) (< v_z_334 0))) (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse2 (+ .cse1 v_z_334))) (or (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 .cse2) (< v_z_334 0) (< 4294967295 .cse2)))))) is different from false [2023-11-17 12:09:48,978 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (= c_~x_2~0 0) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse1 (+ .cse2 v_z_334))) (or (< 4294967295 v_z_334) (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= (+ .cse0 4294967296) .cse1) (= .cse0 .cse1) (< v_z_334 0)))) (= c_~x_1~0 0) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse3 (+ .cse2 v_z_334))) (or (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 .cse3) (< v_z_334 0) (< 4294967295 .cse3)))))) is different from false [2023-11-17 12:09:51,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:09:53,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:09:55,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:09:57,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:09:59,262 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (or (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse1 (+ .cse2 v_z_334))) (or (< 4294967295 v_z_334) (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= (+ .cse0 4294967296) .cse1) (= .cse0 .cse1) (< v_z_334 0)))) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse3 (+ .cse2 v_z_334))) (or (not (= (+ (* v_y_334 4294967296) (* 2863311531 v_z_334)) 0)) (= .cse0 .cse3) (< v_z_334 0) (< 4294967295 .cse3))))))) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-11-17 12:10:01,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:03,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:05,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:07,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:09,399 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0) (or (let ((.cse2 (mod c_~x_1~0 4294967296))) (let ((.cse1 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse6 (+ .cse2 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse0 (+ (* v_y_334 4294967296) (* 2863311531 v_z_334))) (.cse3 (+ .cse4 v_z_334))) (or (< .cse0 0) (< .cse1 .cse0) (= .cse2 .cse3) (< v_z_334 0) (< 4294967295 .cse3)))) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse5 (+ (* v_y_334 4294967296) (* 2863311531 v_z_334))) (.cse7 (+ .cse4 v_z_334))) (or (< 4294967295 v_z_334) (< .cse5 0) (< .cse1 .cse5) (= .cse6 .cse7) (= .cse2 .cse7) (< v_z_334 0)))) (forall ((v_z_334 Int) (v_y_334 Int)) (let ((.cse8 (+ (* v_y_334 4294967296) (* 2863311531 v_z_334))) (.cse9 (+ .cse4 v_z_334))) (or (< 4294967295 v_z_334) (< .cse8 0) (< .cse9 4294967296) (< .cse1 .cse8) (= .cse6 .cse9))))))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)))) is different from false [2023-11-17 12:10:11,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:13,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:15,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:17,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:19,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:21,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:24,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:28,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:37,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:39,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:41,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:45,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:47,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:49,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:51,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:54,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:56,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:10:58,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:11:00,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:11:02,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:11:05,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:11:05,512 INFO L124 PetriNetUnfolderBase]: 1296/2469 cut-off events. [2023-11-17 12:11:05,512 INFO L125 PetriNetUnfolderBase]: For 138308/138308 co-relation queries the response was YES. [2023-11-17 12:11:05,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28204 conditions, 2469 events. 1296/2469 cut-off events. For 138308/138308 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16295 event pairs, 241 based on Foata normal form. 3/2458 useless extension candidates. Maximal degree in co-relation 28058. Up to 1850 conditions per place. [2023-11-17 12:11:05,546 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 483 selfloop transitions, 143 changer transitions 5/631 dead transitions. [2023-11-17 12:11:05,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 631 transitions, 13546 flow [2023-11-17 12:11:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:11:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:11:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 126 transitions. [2023-11-17 12:11:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2023-11-17 12:11:05,547 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 126 transitions. [2023-11-17 12:11:05,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 126 transitions. [2023-11-17 12:11:05,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:05,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 126 transitions. [2023-11-17 12:11:05,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:05,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:05,548 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:05,548 INFO L175 Difference]: Start difference. First operand has 425 places, 557 transitions, 9994 flow. Second operand 16 states and 126 transitions. [2023-11-17 12:11:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 631 transitions, 13546 flow [2023-11-17 12:11:06,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 631 transitions, 11891 flow, removed 817 selfloop flow, removed 3 redundant places. [2023-11-17 12:11:06,354 INFO L231 Difference]: Finished difference. Result has 444 places, 592 transitions, 10501 flow [2023-11-17 12:11:06,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10501, PETRI_PLACES=444, PETRI_TRANSITIONS=592} [2023-11-17 12:11:06,356 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 424 predicate places. [2023-11-17 12:11:06,356 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 592 transitions, 10501 flow [2023-11-17 12:11:06,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:06,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:06,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:11:06,561 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:06,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -91681858, now seen corresponding path program 27 times [2023-11-17 12:11:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322809623] [2023-11-17 12:11:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:07,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322809623] [2023-11-17 12:11:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322809623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288946047] [2023-11-17 12:11:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:07,061 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:07,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:11:07,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:11:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:07,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:11:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:07,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:10,965 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse5 (mod (+ 2 c_thread1Thread1of1ForFork0_~i~0) 4294967296)) (.cse0 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse2 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse3 (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1))) (and (forall ((v_z_341 Int)) (or (let ((.cse1 (* 2 v_z_341))) (< (+ c_~x_1~0 .cse0 .cse1) (+ (* (div (+ c_~x_1~0 .cse1) 4294967296) 4294967296) c_~x_2~0 2 .cse2))) (< v_z_341 .cse3) (< .cse4 v_z_341))) (forall ((v_z_345 Int)) (or (< v_z_345 .cse3) (< .cse4 v_z_345) (let ((.cse6 (* 2 v_z_345))) (< (+ c_~x_2~0 .cse5 (* (div (+ c_~x_1~0 .cse6) 4294967296) 4294967296)) (+ c_~x_1~0 .cse6 4294967297 .cse0))))) (forall ((v_z_343 Int)) (let ((.cse8 (* 2 v_z_343))) (let ((.cse7 (* (div (+ c_~x_1~0 .cse8) 4294967296) 4294967296))) (or (< .cse4 v_z_343) (< (+ .cse7 c_~x_2~0 .cse5) (+ c_~x_1~0 .cse0 .cse8 1)) (< (+ c_~x_1~0 4294967294 .cse0 .cse8) (+ .cse7 c_~x_2~0 .cse2)) (< v_z_343 .cse3))))))) is different from false [2023-11-17 12:11:13,052 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1)) (.cse0 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse1 (* (div c_~x_2~0 4294967296) 4294967296))) (and (forall ((v_z_343 Int)) (let ((.cse2 (* 2 v_z_343))) (let ((.cse3 (* (div (+ c_~x_1~0 .cse2) 4294967296) 4294967296))) (or (< .cse0 v_z_343) (< (+ c_~x_1~0 .cse1 .cse2 4294967293) (+ .cse3 c_~x_2~0)) (< (+ .cse3 c_~x_2~0 1) (+ c_~x_1~0 .cse1 .cse2)) (< v_z_343 .cse4))))) (forall ((v_z_341 Int)) (or (let ((.cse5 (* 2 v_z_341))) (< (+ c_~x_1~0 .cse1 .cse5) (+ (* (div (+ c_~x_1~0 .cse5) 4294967296) 4294967296) c_~x_2~0 3))) (< v_z_341 .cse4) (< .cse0 v_z_341))) (forall ((v_z_345 Int)) (or (< v_z_345 .cse4) (< .cse0 v_z_345) (let ((.cse6 (* 2 v_z_345))) (< (+ c_~x_2~0 (* (div (+ c_~x_1~0 .cse6) 4294967296) 4294967296)) (+ c_~x_1~0 4294967295 .cse6 .cse1))))))) is different from false [2023-11-17 12:11:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-17 12:11:13,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288946047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:13,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:13,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:11:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297197431] [2023-11-17 12:11:13,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:11:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:11:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=245, Unknown=2, NotChecked=66, Total=380 [2023-11-17 12:11:13,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:11:13,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 592 transitions, 10501 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:13,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:11:13,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:16,026 INFO L124 PetriNetUnfolderBase]: 1308/2499 cut-off events. [2023-11-17 12:11:16,026 INFO L125 PetriNetUnfolderBase]: For 100975/100975 co-relation queries the response was YES. [2023-11-17 12:11:16,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26029 conditions, 2499 events. 1308/2499 cut-off events. For 100975/100975 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16594 event pairs, 382 based on Foata normal form. 2/2486 useless extension candidates. Maximal degree in co-relation 25875. Up to 2393 conditions per place. [2023-11-17 12:11:16,054 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 531 selfloop transitions, 83 changer transitions 10/624 dead transitions. [2023-11-17 12:11:16,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 624 transitions, 12298 flow [2023-11-17 12:11:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:11:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:11:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 137 transitions. [2023-11-17 12:11:16,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605263157894737 [2023-11-17 12:11:16,056 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 137 transitions. [2023-11-17 12:11:16,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 137 transitions. [2023-11-17 12:11:16,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:16,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 137 transitions. [2023-11-17 12:11:16,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:16,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:16,057 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:16,057 INFO L175 Difference]: Start difference. First operand has 444 places, 592 transitions, 10501 flow. Second operand 19 states and 137 transitions. [2023-11-17 12:11:16,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 624 transitions, 12298 flow [2023-11-17 12:11:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 624 transitions, 11916 flow, removed 143 selfloop flow, removed 5 redundant places. [2023-11-17 12:11:16,641 INFO L231 Difference]: Finished difference. Result has 463 places, 599 transitions, 10564 flow [2023-11-17 12:11:16,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10135, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10564, PETRI_PLACES=463, PETRI_TRANSITIONS=599} [2023-11-17 12:11:16,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 443 predicate places. [2023-11-17 12:11:16,642 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 599 transitions, 10564 flow [2023-11-17 12:11:16,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:16,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-17 12:11:16,848 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:16,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1590011792, now seen corresponding path program 9 times [2023-11-17 12:11:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:16,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709241869] [2023-11-17 12:11:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709241869] [2023-11-17 12:11:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709241869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979153203] [2023-11-17 12:11:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:17,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:17,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:17,036 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:17,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:11:17,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:11:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:17,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:11:17,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:17,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979153203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:17,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2023-11-17 12:11:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888195113] [2023-11-17 12:11:17,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:17,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:11:17,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:11:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:11:17,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:11:17,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 599 transitions, 10564 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:11:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 12:11:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:11:17,705 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:11:17,709 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:11:17,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:17,744 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:11:17,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:17,905 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 3/20 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 348 conditions, 17 events (4/16 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 60 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 188. Up to 7 conditions per place.). [2023-11-17 12:11:17,907 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:11:17,907 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:11:17,907 INFO L445 BasicCegarLoop]: Path program histogram: [27, 9, 5, 1] [2023-11-17 12:11:17,909 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:11:17,909 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:11:17,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:11:17 BasicIcfg [2023-11-17 12:11:17,911 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:11:17,911 INFO L158 Benchmark]: Toolchain (without parser) took 568604.88ms. Allocated memory was 186.6MB in the beginning and 614.5MB in the end (delta: 427.8MB). Free memory was 154.3MB in the beginning and 235.7MB in the end (delta: -81.4MB). Peak memory consumption was 347.8MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,911 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 186.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:11:17,911 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.86ms. Allocated memory is still 186.6MB. Free memory was 154.3MB in the beginning and 143.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,911 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.17ms. Allocated memory is still 186.6MB. Free memory was 143.2MB in the beginning and 141.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,911 INFO L158 Benchmark]: Boogie Preprocessor took 29.51ms. Allocated memory is still 186.6MB. Free memory was 141.7MB in the beginning and 140.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,912 INFO L158 Benchmark]: RCFGBuilder took 450.71ms. Allocated memory is still 186.6MB. Free memory was 140.5MB in the beginning and 118.4MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,912 INFO L158 Benchmark]: TraceAbstraction took 567886.93ms. Allocated memory was 186.6MB in the beginning and 614.5MB in the end (delta: 427.8MB). Free memory was 117.6MB in the beginning and 235.7MB in the end (delta: -118.1MB). Peak memory consumption was 311.1MB. Max. memory is 8.0GB. [2023-11-17 12:11:17,912 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 186.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 202.86ms. Allocated memory is still 186.6MB. Free memory was 154.3MB in the beginning and 143.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.17ms. Allocated memory is still 186.6MB. Free memory was 143.2MB in the beginning and 141.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.51ms. Allocated memory is still 186.6MB. Free memory was 141.7MB in the beginning and 140.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 450.71ms. Allocated memory is still 186.6MB. Free memory was 140.5MB in the beginning and 118.4MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 567886.93ms. Allocated memory was 186.6MB in the beginning and 614.5MB in the end (delta: 427.8MB). Free memory was 117.6MB in the beginning and 235.7MB in the end (delta: -118.1MB). Peak memory consumption was 311.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 21 PlacesBefore, 20 PlacesAfterwards, 16 TransitionsBefore, 15 TransitionsAfterwards, 54 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, independent: 48, independent conditional: 0, independent unconditional: 48, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 48, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 3/20 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 348 conditions, 17 events (4/16 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 60 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 188. Up to 7 conditions per place.). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 3/20 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 348 conditions, 17 events (4/16 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 60 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 188. Up to 7 conditions per place.). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 3/20 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 348 conditions, 17 events (4/16 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 60 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 188. Up to 7 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 567.8s, OverallIterations: 42, TraceHistogramMax: 3, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 284.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 70 mSolverCounterUnknown, 2048 SdHoareTripleChecker+Valid, 193.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2048 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 189.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1755 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 670 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18541 IncrementalHoareTripleChecker+Invalid, 21036 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 670 mSolverCounterUnsat, 0 mSDtfsCounter, 18541 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1765 GetRequests, 748 SyntacticMatches, 58 SemanticMatches, 959 ConstructedPredicates, 27 IntricatePredicates, 0 DeprecatedPredicates, 7009 ImplicationChecksByTransitivity, 194.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10564occurred in iteration=41, InterpolantAutomatonStates: 784, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 268.9s InterpolantComputationTime, 1265 NumberOfCodeBlocks, 1265 NumberOfCodeBlocksAsserted, 126 NumberOfCheckSat, 1767 ConstructedInterpolants, 38 QuantifiedInterpolants, 38133 SizeOfPredicates, 153 NumberOfNonLiveVariables, 5139 ConjunctsInSsa, 810 ConjunctsInUnsatCore, 124 InterpolantComputations, 1 PerfectInterpolantSequences, 5/375 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown