/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/popl20-more-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:18:03,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:18:03,783 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 12:18:03,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:18:03,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:18:03,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:18:03,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:18:03,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:18:03,820 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:18:03,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:18:03,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:18:03,826 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:18:03,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:18:03,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:18:03,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:18:03,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:18:03,828 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:18:03,828 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:18:03,829 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:18:03,829 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:18:03,829 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:18:03,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:18:03,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:18:03,830 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:18:03,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:18:03,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:18:03,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:18:03,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:18:03,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:18:03,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:18:03,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:18:03,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:18:03,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:18:04,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:18:04,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:18:04,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:18:04,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:18:04,059 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:18:04,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-11-17 12:18:05,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:18:05,413 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:18:05,414 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-11-17 12:18:05,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa48e7d6/f1513d0181294c67a32449d67081f7d7/FLAG41251cec8 [2023-11-17 12:18:05,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa48e7d6/f1513d0181294c67a32449d67081f7d7 [2023-11-17 12:18:05,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:18:05,439 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:18:05,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:18:05,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:18:05,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:18:05,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcdcb8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05, skipping insertion in model container [2023-11-17 12:18:05,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,467 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:18:05,599 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c[2874,2887] [2023-11-17 12:18:05,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:18:05,618 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:18:05,637 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c[2874,2887] [2023-11-17 12:18:05,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:18:05,649 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:18:05,649 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:18:05,656 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:18:05,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05 WrapperNode [2023-11-17 12:18:05,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:18:05,657 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:18:05,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:18:05,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:18:05,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,731 INFO L138 Inliner]: procedures = 25, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 291 [2023-11-17 12:18:05,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:18:05,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:18:05,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:18:05,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:18:05,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,772 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:18:05,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:18:05,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:18:05,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:18:05,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (1/1) ... [2023-11-17 12:18:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:18:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:05,822 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 12:18:05,849 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 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:18:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:18:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:18:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:18:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:18:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:18:05,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:18:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:18:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:18:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:18:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:18:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:18:05,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:18:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:18:05,864 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 12:18:05,994 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:18:05,997 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:18:06,425 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:18:06,821 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:18:06,822 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 12:18:06,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:18:06 BoogieIcfgContainer [2023-11-17 12:18:06,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:18:06,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:18:06,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:18:06,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:18:06,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:18:05" (1/3) ... [2023-11-17 12:18:06,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33966c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:18:06, skipping insertion in model container [2023-11-17 12:18:06,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:18:05" (2/3) ... [2023-11-17 12:18:06,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33966c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:18:06, skipping insertion in model container [2023-11-17 12:18:06,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:18:06" (3/3) ... [2023-11-17 12:18:06,834 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2023-11-17 12:18:06,851 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:18:06,852 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:18:06,852 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:18:06,909 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:18:06,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 40 transitions, 101 flow [2023-11-17 12:18:06,972 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-11-17 12:18:06,972 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:18:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 5/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 12:18:06,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 40 transitions, 101 flow [2023-11-17 12:18:06,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 36 transitions, 90 flow [2023-11-17 12:18:06,989 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:18:07,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 36 transitions, 90 flow [2023-11-17 12:18:07,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 36 transitions, 90 flow [2023-11-17 12:18:07,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 36 transitions, 90 flow [2023-11-17 12:18:07,037 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 12:18:07,037 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:18:07,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 5/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 12:18:07,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-11-17 12:18:07,981 INFO L134 LiptonReduction]: Checked pairs total: 749 [2023-11-17 12:18:07,981 INFO L136 LiptonReduction]: Total number of compositions: 8 [2023-11-17 12:18:08,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:18:08,008 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;@27a18b37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:18:08,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:18:08,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:18:08,020 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-17 12:18:08,020 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:18:08,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:08,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:08,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:08,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1925178661, now seen corresponding path program 1 times [2023-11-17 12:18:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:08,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15546066] [2023-11-17 12:18:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:08,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:08,414 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 12:18:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15546066] [2023-11-17 12:18:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15546066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:18:08,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:18:08,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:18:08,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014090708] [2023-11-17 12:18:08,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:18:08,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:18:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:18:08,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:18:08,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:08,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:08,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:18:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:08,672 INFO L124 PetriNetUnfolderBase]: 724/1056 cut-off events. [2023-11-17 12:18:08,672 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-17 12:18:08,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 1056 events. 724/1056 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3808 event pairs, 253 based on Foata normal form. 1/827 useless extension candidates. Maximal degree in co-relation 1702. Up to 632 conditions per place. [2023-11-17 12:18:08,685 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 44 selfloop transitions, 4 changer transitions 1/49 dead transitions. [2023-11-17 12:18:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 49 transitions, 229 flow [2023-11-17 12:18:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:18:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:18:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-17 12:18:08,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2023-11-17 12:18:08,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-17 12:18:08,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-17 12:18:08,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:08,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-17 12:18:08,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:08,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:08,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:08,713 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 3 states and 71 transitions. [2023-11-17 12:18:08,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 49 transitions, 229 flow [2023-11-17 12:18:08,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 207 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:18:08,721 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 88 flow [2023-11-17 12:18:08,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-11-17 12:18:08,728 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-17 12:18:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 88 flow [2023-11-17 12:18:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:08,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:08,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:18:08,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:08,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1815774432, now seen corresponding path program 1 times [2023-11-17 12:18:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630337734] [2023-11-17 12:18:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630337734] [2023-11-17 12:18:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630337734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:18:08,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:18:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:18:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39758530] [2023-11-17 12:18:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:18:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:18:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:18:09,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 48 [2023-11-17 12:18:09,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:09,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 48 [2023-11-17 12:18:09,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:09,210 INFO L124 PetriNetUnfolderBase]: 724/1059 cut-off events. [2023-11-17 12:18:09,210 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-17 12:18:09,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 1059 events. 724/1059 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3640 event pairs, 506 based on Foata normal form. 1/913 useless extension candidates. Maximal degree in co-relation 886. Up to 1057 conditions per place. [2023-11-17 12:18:09,217 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 29 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2023-11-17 12:18:09,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 162 flow [2023-11-17 12:18:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:18:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:18:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2023-11-17 12:18:09,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2023-11-17 12:18:09,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 66 transitions. [2023-11-17 12:18:09,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 66 transitions. [2023-11-17 12:18:09,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:09,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 66 transitions. [2023-11-17 12:18:09,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 12:18:09,223 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 12:18:09,223 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 88 flow. Second operand 4 states and 66 transitions. [2023-11-17 12:18:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 162 flow [2023-11-17 12:18:09,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:18:09,226 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 110 flow [2023-11-17 12:18:09,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-17 12:18:09,227 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-11-17 12:18:09,227 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 110 flow [2023-11-17 12:18:09,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:09,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:09,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:18:09,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:09,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2142170180, now seen corresponding path program 1 times [2023-11-17 12:18:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801446817] [2023-11-17 12:18:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:09,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:18:09,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801446817] [2023-11-17 12:18:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801446817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:18:09,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:18:09,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:18:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810053882] [2023-11-17 12:18:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:09,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:18:09,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:18:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:18:09,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:18:09,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:09,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:18:09,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:09,518 INFO L124 PetriNetUnfolderBase]: 719/1050 cut-off events. [2023-11-17 12:18:09,518 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2023-11-17 12:18:09,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 1050 events. 719/1050 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3623 event pairs, 258 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 2352. Up to 571 conditions per place. [2023-11-17 12:18:09,525 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-17 12:18:09,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 246 flow [2023-11-17 12:18:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:18:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:18:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2023-11-17 12:18:09,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2023-11-17 12:18:09,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 70 transitions. [2023-11-17 12:18:09,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 70 transitions. [2023-11-17 12:18:09,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:09,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 70 transitions. [2023-11-17 12:18:09,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 12:18:09,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 12:18:09,530 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 110 flow. Second operand 4 states and 70 transitions. [2023-11-17 12:18:09,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 246 flow [2023-11-17 12:18:09,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 236 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 12:18:09,533 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 125 flow [2023-11-17 12:18:09,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-11-17 12:18:09,535 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-17 12:18:09,535 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 125 flow [2023-11-17 12:18:09,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:09,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:09,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:18:09,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:09,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1022755675, now seen corresponding path program 1 times [2023-11-17 12:18:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:09,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660274570] [2023-11-17 12:18:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660274570] [2023-11-17 12:18:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660274570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:09,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391938071] [2023-11-17 12:18:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:09,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:09,705 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 12:18:09,733 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 12:18:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:09,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:18:09,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:09,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391938071] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:09,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:18:09,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-17 12:18:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057556489] [2023-11-17 12:18:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:09,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:18:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:18:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:18:09,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 48 [2023-11-17 12:18:09,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 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 12:18:09,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:09,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 48 [2023-11-17 12:18:09,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:10,146 INFO L124 PetriNetUnfolderBase]: 689/998 cut-off events. [2023-11-17 12:18:10,147 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2023-11-17 12:18:10,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 998 events. 689/998 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3461 event pairs, 327 based on Foata normal form. 76/999 useless extension candidates. Maximal degree in co-relation 2671. Up to 741 conditions per place. [2023-11-17 12:18:10,154 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-17 12:18:10,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 293 flow [2023-11-17 12:18:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:18:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:18:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-17 12:18:10,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-17 12:18:10,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-17 12:18:10,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-17 12:18:10,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:10,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-17 12:18:10,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:10,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:10,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:10,158 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 125 flow. Second operand 5 states and 84 transitions. [2023-11-17 12:18:10,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 293 flow [2023-11-17 12:18:10,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:18:10,164 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 141 flow [2023-11-17 12:18:10,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-17 12:18:10,166 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-17 12:18:10,166 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 141 flow [2023-11-17 12:18:10,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 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 12:18:10,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:10,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:10,176 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 12:18:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:10,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:10,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -354667104, now seen corresponding path program 1 times [2023-11-17 12:18:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:10,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998324076] [2023-11-17 12:18:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:12,275 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 12:18:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998324076] [2023-11-17 12:18:12,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998324076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:12,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059722627] [2023-11-17 12:18:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:12,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:12,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:12,285 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 12:18:12,308 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 12:18:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:12,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 12:18:12,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:12,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,484 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-17 12:18:12,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-17 12:18:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,519 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-17 12:18:12,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:18:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,547 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-17 12:18:12,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2023-11-17 12:18:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,571 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-17 12:18:12,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2023-11-17 12:18:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:12,728 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:18:12,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-17 12:18:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:13,196 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:18:13,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 12:18:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:13,327 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:18:13,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 12:18:13,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:13,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:13,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:13,579 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_138 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))) c_~res1~0)) is different from false [2023-11-17 12:18:15,643 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_138 (Array Int Int)) (v_ArrVal_137 (Array Int Int))) (= (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))) c_~res1~0)) is different from false [2023-11-17 12:18:15,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:15,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3062 treesize of output 1858 [2023-11-17 12:18:15,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:15,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 438 treesize of output 398 [2023-11-17 12:18:15,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:15,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 390 treesize of output 302 [2023-11-17 12:18:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-17 12:18:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059722627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:18,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:18,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2023-11-17 12:18:18,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695658620] [2023-11-17 12:18:18,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:18,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:18:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:18:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=833, Unknown=2, NotChecked=118, Total=1056 [2023-11-17 12:18:18,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:18,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 141 flow. Second operand has 33 states, 33 states have (on average 5.96969696969697) internal successors, (197), 33 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:18,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:18,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:18,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:20,928 INFO L124 PetriNetUnfolderBase]: 1587/2298 cut-off events. [2023-11-17 12:18:20,928 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2023-11-17 12:18:20,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6753 conditions, 2298 events. 1587/2298 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9301 event pairs, 120 based on Foata normal form. 2/2126 useless extension candidates. Maximal degree in co-relation 6011. Up to 1133 conditions per place. [2023-11-17 12:18:20,944 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 136 selfloop transitions, 45 changer transitions 2/183 dead transitions. [2023-11-17 12:18:20,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 183 transitions, 993 flow [2023-11-17 12:18:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:18:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:18:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 255 transitions. [2023-11-17 12:18:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2951388888888889 [2023-11-17 12:18:20,946 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 255 transitions. [2023-11-17 12:18:20,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 255 transitions. [2023-11-17 12:18:20,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:20,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 255 transitions. [2023-11-17 12:18:20,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:20,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:20,950 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:20,950 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 141 flow. Second operand 18 states and 255 transitions. [2023-11-17 12:18:20,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 183 transitions, 993 flow [2023-11-17 12:18:20,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 183 transitions, 977 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:18:20,956 INFO L231 Difference]: Finished difference. Result has 61 places, 74 transitions, 473 flow [2023-11-17 12:18:20,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=473, PETRI_PLACES=61, PETRI_TRANSITIONS=74} [2023-11-17 12:18:20,956 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2023-11-17 12:18:20,957 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 74 transitions, 473 flow [2023-11-17 12:18:20,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.96969696969697) internal successors, (197), 33 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:20,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:20,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:20,967 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 12:18:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:21,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:21,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -870560380, now seen corresponding path program 2 times [2023-11-17 12:18:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267787314] [2023-11-17 12:18:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:21,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267787314] [2023-11-17 12:18:21,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267787314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375759767] [2023-11-17 12:18:21,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:18:21,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:21,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:21,877 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 12:18:21,879 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 12:18:22,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:18:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:22,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:18:22,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:22,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:22,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:22,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:22,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:22,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-17 12:18:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375759767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:22,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:18:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487017180] [2023-11-17 12:18:22,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:22,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:18:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:18:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:18:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 74 transitions, 473 flow. Second operand has 24 states, 24 states have (on average 6.458333333333333) internal successors, (155), 24 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:24,116 INFO L124 PetriNetUnfolderBase]: 2416/3454 cut-off events. [2023-11-17 12:18:24,116 INFO L125 PetriNetUnfolderBase]: For 4159/4159 co-relation queries the response was YES. [2023-11-17 12:18:24,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12026 conditions, 3454 events. 2416/3454 cut-off events. For 4159/4159 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14637 event pairs, 423 based on Foata normal form. 1/3202 useless extension candidates. Maximal degree in co-relation 11433. Up to 2257 conditions per place. [2023-11-17 12:18:24,141 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 170 selfloop transitions, 75 changer transitions 1/246 dead transitions. [2023-11-17 12:18:24,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 246 transitions, 1677 flow [2023-11-17 12:18:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:18:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:18:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 306 transitions. [2023-11-17 12:18:24,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.255 [2023-11-17 12:18:24,143 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 306 transitions. [2023-11-17 12:18:24,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 306 transitions. [2023-11-17 12:18:24,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:24,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 306 transitions. [2023-11-17 12:18:24,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 12.24) internal successors, (306), 25 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:24,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 48.0) internal successors, (1248), 26 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:24,146 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 48.0) internal successors, (1248), 26 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:24,147 INFO L175 Difference]: Start difference. First operand has 61 places, 74 transitions, 473 flow. Second operand 25 states and 306 transitions. [2023-11-17 12:18:24,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 246 transitions, 1677 flow [2023-11-17 12:18:24,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 246 transitions, 1579 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-11-17 12:18:24,159 INFO L231 Difference]: Finished difference. Result has 95 places, 135 transitions, 1061 flow [2023-11-17 12:18:24,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1061, PETRI_PLACES=95, PETRI_TRANSITIONS=135} [2023-11-17 12:18:24,160 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 62 predicate places. [2023-11-17 12:18:24,160 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 135 transitions, 1061 flow [2023-11-17 12:18:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.458333333333333) internal successors, (155), 24 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:24,169 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 12:18:24,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:24,367 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:24,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 791947514, now seen corresponding path program 3 times [2023-11-17 12:18:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:24,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810677229] [2023-11-17 12:18:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:25,464 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 12:18:25,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:25,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810677229] [2023-11-17 12:18:25,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810677229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:25,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468637027] [2023-11-17 12:18:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:18:25,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:25,466 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 12:18:25,484 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 12:18:25,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:18:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:25,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:18:25,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:25,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:25,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:25,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:26,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:26,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:18:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:26,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468637027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:26,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:26,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 27 [2023-11-17 12:18:26,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781159490] [2023-11-17 12:18:26,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:26,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:18:26,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:26,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:18:26,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:18:26,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:26,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 135 transitions, 1061 flow. Second operand has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:26,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:26,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:26,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:28,987 INFO L124 PetriNetUnfolderBase]: 3563/5082 cut-off events. [2023-11-17 12:18:28,987 INFO L125 PetriNetUnfolderBase]: For 14171/14171 co-relation queries the response was YES. [2023-11-17 12:18:28,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21653 conditions, 5082 events. 3563/5082 cut-off events. For 14171/14171 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23622 event pairs, 358 based on Foata normal form. 1/4767 useless extension candidates. Maximal degree in co-relation 20935. Up to 3492 conditions per place. [2023-11-17 12:18:29,025 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 250 selfloop transitions, 260 changer transitions 1/511 dead transitions. [2023-11-17 12:18:29,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 511 transitions, 4688 flow [2023-11-17 12:18:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 12:18:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 12:18:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 453 transitions. [2023-11-17 12:18:29,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22470238095238096 [2023-11-17 12:18:29,028 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 453 transitions. [2023-11-17 12:18:29,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 453 transitions. [2023-11-17 12:18:29,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:29,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 453 transitions. [2023-11-17 12:18:29,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 10.785714285714286) internal successors, (453), 42 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 48.0) internal successors, (2064), 43 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,033 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 48.0) internal successors, (2064), 43 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,033 INFO L175 Difference]: Start difference. First operand has 95 places, 135 transitions, 1061 flow. Second operand 42 states and 453 transitions. [2023-11-17 12:18:29,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 511 transitions, 4688 flow [2023-11-17 12:18:29,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 511 transitions, 4513 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-11-17 12:18:29,071 INFO L231 Difference]: Finished difference. Result has 148 places, 363 transitions, 3735 flow [2023-11-17 12:18:29,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3735, PETRI_PLACES=148, PETRI_TRANSITIONS=363} [2023-11-17 12:18:29,072 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 115 predicate places. [2023-11-17 12:18:29,072 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 363 transitions, 3735 flow [2023-11-17 12:18:29,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:29,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:29,079 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 12:18:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:29,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:29,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1169355358, now seen corresponding path program 4 times [2023-11-17 12:18:29,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:29,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545087022] [2023-11-17 12:18:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:29,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:30,329 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 12:18:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545087022] [2023-11-17 12:18:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545087022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465188338] [2023-11-17 12:18:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:18:30,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:30,331 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 12:18:30,354 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 12:18:30,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:18:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:30,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:18:30,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:30,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:30,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:30,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:30,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:30,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:18:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:31,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465188338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:31,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:31,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 27 [2023-11-17 12:18:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007992717] [2023-11-17 12:18:31,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:18:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:18:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:18:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:31,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 363 transitions, 3735 flow. Second operand has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:31,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:33,431 INFO L124 PetriNetUnfolderBase]: 4146/5952 cut-off events. [2023-11-17 12:18:33,431 INFO L125 PetriNetUnfolderBase]: For 30007/30007 co-relation queries the response was YES. [2023-11-17 12:18:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32481 conditions, 5952 events. 4146/5952 cut-off events. For 30007/30007 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28818 event pairs, 469 based on Foata normal form. 1/5941 useless extension candidates. Maximal degree in co-relation 31456. Up to 3979 conditions per place. [2023-11-17 12:18:33,500 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 259 selfloop transitions, 355 changer transitions 1/615 dead transitions. [2023-11-17 12:18:33,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 615 transitions, 7225 flow [2023-11-17 12:18:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:18:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:18:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 336 transitions. [2023-11-17 12:18:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22580645161290322 [2023-11-17 12:18:33,503 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 336 transitions. [2023-11-17 12:18:33,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 336 transitions. [2023-11-17 12:18:33,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:33,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 336 transitions. [2023-11-17 12:18:33,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 10.838709677419354) internal successors, (336), 31 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:33,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:33,507 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:33,507 INFO L175 Difference]: Start difference. First operand has 148 places, 363 transitions, 3735 flow. Second operand 31 states and 336 transitions. [2023-11-17 12:18:33,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 615 transitions, 7225 flow [2023-11-17 12:18:33,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 615 transitions, 6835 flow, removed 136 selfloop flow, removed 8 redundant places. [2023-11-17 12:18:33,736 INFO L231 Difference]: Finished difference. Result has 186 places, 504 transitions, 6144 flow [2023-11-17 12:18:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6144, PETRI_PLACES=186, PETRI_TRANSITIONS=504} [2023-11-17 12:18:33,738 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 153 predicate places. [2023-11-17 12:18:33,738 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 504 transitions, 6144 flow [2023-11-17 12:18:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:33,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:33,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:33,745 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 12:18:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:33,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:33,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash -573880682, now seen corresponding path program 5 times [2023-11-17 12:18:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630847750] [2023-11-17 12:18:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:35,042 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 12:18:35,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:35,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630847750] [2023-11-17 12:18:35,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630847750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:35,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439366218] [2023-11-17 12:18:35,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:18:35,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:35,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:35,045 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 12:18:35,066 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 12:18:35,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:18:35,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:35,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:18:35,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:35,577 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-11-17 12:18:35,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-11-17 12:18:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:35,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:35,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:35,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:18:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439366218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:36,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:36,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 26 [2023-11-17 12:18:36,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71357027] [2023-11-17 12:18:36,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:18:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:18:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:18:36,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:36,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 504 transitions, 6144 flow. Second operand has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 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 12:18:36,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:36,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:38,566 INFO L124 PetriNetUnfolderBase]: 5846/8326 cut-off events. [2023-11-17 12:18:38,567 INFO L125 PetriNetUnfolderBase]: For 67954/67954 co-relation queries the response was YES. [2023-11-17 12:18:38,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53636 conditions, 8326 events. 5846/8326 cut-off events. For 67954/67954 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41895 event pairs, 722 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 53312. Up to 5232 conditions per place. [2023-11-17 12:18:38,640 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 438 selfloop transitions, 450 changer transitions 2/890 dead transitions. [2023-11-17 12:18:38,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 890 transitions, 12204 flow [2023-11-17 12:18:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:18:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:18:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 406 transitions. [2023-11-17 12:18:38,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2728494623655914 [2023-11-17 12:18:38,643 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 406 transitions. [2023-11-17 12:18:38,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 406 transitions. [2023-11-17 12:18:38,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:38,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 406 transitions. [2023-11-17 12:18:38,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 13.096774193548388) internal successors, (406), 31 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:38,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:38,647 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 48.0) internal successors, (1536), 32 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:38,647 INFO L175 Difference]: Start difference. First operand has 186 places, 504 transitions, 6144 flow. Second operand 31 states and 406 transitions. [2023-11-17 12:18:38,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 890 transitions, 12204 flow [2023-11-17 12:18:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 890 transitions, 11838 flow, removed 169 selfloop flow, removed 5 redundant places. [2023-11-17 12:18:38,950 INFO L231 Difference]: Finished difference. Result has 225 places, 722 transitions, 10148 flow [2023-11-17 12:18:38,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5836, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10148, PETRI_PLACES=225, PETRI_TRANSITIONS=722} [2023-11-17 12:18:38,951 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 192 predicate places. [2023-11-17 12:18:38,951 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 722 transitions, 10148 flow [2023-11-17 12:18:38,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 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 12:18:38,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:38,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:38,956 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 12:18:39,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:39,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:39,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 130297258, now seen corresponding path program 6 times [2023-11-17 12:18:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:39,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964318857] [2023-11-17 12:18:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:39,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:39,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964318857] [2023-11-17 12:18:39,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964318857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:39,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325719639] [2023-11-17 12:18:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:18:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:39,732 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 12:18:39,737 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 12:18:39,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:18:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:39,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:18:39,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:40,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:40,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:40,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:40,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:40,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:18:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325719639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:40,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:18:40,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963646240] [2023-11-17 12:18:40,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:40,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:18:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:18:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:18:40,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:40,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 722 transitions, 10148 flow. Second operand has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 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 12:18:40,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:40,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:43,980 INFO L124 PetriNetUnfolderBase]: 7807/11097 cut-off events. [2023-11-17 12:18:43,980 INFO L125 PetriNetUnfolderBase]: For 129072/129072 co-relation queries the response was YES. [2023-11-17 12:18:44,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80540 conditions, 11097 events. 7807/11097 cut-off events. For 129072/129072 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58512 event pairs, 923 based on Foata normal form. 2/11099 useless extension candidates. Maximal degree in co-relation 80215. Up to 7963 conditions per place. [2023-11-17 12:18:44,085 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 648 selfloop transitions, 423 changer transitions 2/1073 dead transitions. [2023-11-17 12:18:44,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1073 transitions, 16304 flow [2023-11-17 12:18:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:18:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:18:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 375 transitions. [2023-11-17 12:18:44,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3004807692307692 [2023-11-17 12:18:44,088 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 375 transitions. [2023-11-17 12:18:44,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 375 transitions. [2023-11-17 12:18:44,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:44,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 375 transitions. [2023-11-17 12:18:44,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:44,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:44,091 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 48.0) internal successors, (1296), 27 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:44,091 INFO L175 Difference]: Start difference. First operand has 225 places, 722 transitions, 10148 flow. Second operand 26 states and 375 transitions. [2023-11-17 12:18:44,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1073 transitions, 16304 flow [2023-11-17 12:18:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1073 transitions, 15136 flow, removed 512 selfloop flow, removed 9 redundant places. [2023-11-17 12:18:44,977 INFO L231 Difference]: Finished difference. Result has 252 places, 894 transitions, 13226 flow [2023-11-17 12:18:44,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13226, PETRI_PLACES=252, PETRI_TRANSITIONS=894} [2023-11-17 12:18:44,978 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 219 predicate places. [2023-11-17 12:18:44,978 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 894 transitions, 13226 flow [2023-11-17 12:18:44,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 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 12:18:44,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:44,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:44,984 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 12:18:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:45,180 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:45,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1057895732, now seen corresponding path program 7 times [2023-11-17 12:18:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:45,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348482733] [2023-11-17 12:18:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:46,258 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 12:18:46,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:46,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348482733] [2023-11-17 12:18:46,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348482733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:46,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10858367] [2023-11-17 12:18:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:18:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:46,261 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 12:18:46,282 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 12:18:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:46,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:18:46,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:46,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:46,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:18:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:46,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:46,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:46,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-17 12:18:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10858367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:47,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:47,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2023-11-17 12:18:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407694823] [2023-11-17 12:18:47,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:18:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:18:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-11-17 12:18:47,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:47,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 894 transitions, 13226 flow. Second operand has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:47,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:47,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:47,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:51,297 INFO L124 PetriNetUnfolderBase]: 9916/14090 cut-off events. [2023-11-17 12:18:51,298 INFO L125 PetriNetUnfolderBase]: For 168663/168663 co-relation queries the response was YES. [2023-11-17 12:18:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102070 conditions, 14090 events. 9916/14090 cut-off events. For 168663/168663 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 76944 event pairs, 1316 based on Foata normal form. 3/14093 useless extension candidates. Maximal degree in co-relation 101731. Up to 9978 conditions per place. [2023-11-17 12:18:51,417 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 696 selfloop transitions, 673 changer transitions 11/1380 dead transitions. [2023-11-17 12:18:51,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1380 transitions, 21906 flow [2023-11-17 12:18:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:18:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:18:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 471 transitions. [2023-11-17 12:18:51,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2725694444444444 [2023-11-17 12:18:51,420 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 471 transitions. [2023-11-17 12:18:51,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 471 transitions. [2023-11-17 12:18:51,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:51,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 471 transitions. [2023-11-17 12:18:51,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 13.083333333333334) internal successors, (471), 36 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,424 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,424 INFO L175 Difference]: Start difference. First operand has 252 places, 894 transitions, 13226 flow. Second operand 36 states and 471 transitions. [2023-11-17 12:18:51,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1380 transitions, 21906 flow [2023-11-17 12:18:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1380 transitions, 21007 flow, removed 392 selfloop flow, removed 9 redundant places. [2023-11-17 12:18:52,757 INFO L231 Difference]: Finished difference. Result has 287 places, 1165 transitions, 18533 flow [2023-11-17 12:18:52,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=12429, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18533, PETRI_PLACES=287, PETRI_TRANSITIONS=1165} [2023-11-17 12:18:52,758 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 254 predicate places. [2023-11-17 12:18:52,758 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1165 transitions, 18533 flow [2023-11-17 12:18:52,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:52,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:52,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:52,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:52,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 12:18:52,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:52,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1189768772, now seen corresponding path program 8 times [2023-11-17 12:18:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:52,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461163384] [2023-11-17 12:18:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:52,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:53,882 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 12:18:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461163384] [2023-11-17 12:18:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461163384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051982494] [2023-11-17 12:18:53,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:18:53,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:53,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:53,886 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 12:18:53,889 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 12:18:54,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:18:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:54,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:18:54,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:54,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:54,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-17 12:18:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:54,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:54,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:54,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-17 12:18:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:18:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051982494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:54,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 29 [2023-11-17 12:18:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780657109] [2023-11-17 12:18:54,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:18:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:18:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2023-11-17 12:18:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:18:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1165 transitions, 18533 flow. Second operand has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:54,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:18:54,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:00,716 INFO L124 PetriNetUnfolderBase]: 11961/16982 cut-off events. [2023-11-17 12:19:00,716 INFO L125 PetriNetUnfolderBase]: For 208485/208485 co-relation queries the response was YES. [2023-11-17 12:19:00,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126605 conditions, 16982 events. 11961/16982 cut-off events. For 208485/208485 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 95273 event pairs, 879 based on Foata normal form. 3/16985 useless extension candidates. Maximal degree in co-relation 126234. Up to 10593 conditions per place. [2023-11-17 12:19:00,864 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 686 selfloop transitions, 1118 changer transitions 7/1811 dead transitions. [2023-11-17 12:19:00,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1811 transitions, 30849 flow [2023-11-17 12:19:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-17 12:19:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-17 12:19:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 654 transitions. [2023-11-17 12:19:00,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2349137931034483 [2023-11-17 12:19:00,866 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 654 transitions. [2023-11-17 12:19:00,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 654 transitions. [2023-11-17 12:19:00,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:00,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 654 transitions. [2023-11-17 12:19:00,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 11.275862068965518) internal successors, (654), 58 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:00,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 48.0) internal successors, (2832), 59 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:00,872 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 48.0) internal successors, (2832), 59 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:00,873 INFO L175 Difference]: Start difference. First operand has 287 places, 1165 transitions, 18533 flow. Second operand 58 states and 654 transitions. [2023-11-17 12:19:00,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1811 transitions, 30849 flow [2023-11-17 12:19:03,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1811 transitions, 27273 flow, removed 1631 selfloop flow, removed 12 redundant places. [2023-11-17 12:19:03,162 INFO L231 Difference]: Finished difference. Result has 347 places, 1513 transitions, 24495 flow [2023-11-17 12:19:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=16569, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=24495, PETRI_PLACES=347, PETRI_TRANSITIONS=1513} [2023-11-17 12:19:03,163 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 314 predicate places. [2023-11-17 12:19:03,163 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1513 transitions, 24495 flow [2023-11-17 12:19:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:03,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:03,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:03,168 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 12:19:03,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:03,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:03,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash 993830998, now seen corresponding path program 9 times [2023-11-17 12:19:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:03,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802039421] [2023-11-17 12:19:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:04,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802039421] [2023-11-17 12:19:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802039421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528042581] [2023-11-17 12:19:04,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:19:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:04,013 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 12:19:04,041 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 12:19:04,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:19:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:04,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:19:04,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:04,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:04,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:19:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:04,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:04,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:04,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:19:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:04,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528042581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:04,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:04,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-11-17 12:19:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025980847] [2023-11-17 12:19:04,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:19:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:19:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:19:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:19:04,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1513 transitions, 24495 flow. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:04,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:04,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:19:04,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:10,500 INFO L124 PetriNetUnfolderBase]: 13068/18577 cut-off events. [2023-11-17 12:19:10,501 INFO L125 PetriNetUnfolderBase]: For 226231/226231 co-relation queries the response was YES. [2023-11-17 12:19:10,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141296 conditions, 18577 events. 13068/18577 cut-off events. For 226231/226231 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 106210 event pairs, 1699 based on Foata normal form. 2/18579 useless extension candidates. Maximal degree in co-relation 140912. Up to 16265 conditions per place. [2023-11-17 12:19:11,011 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 1400 selfloop transitions, 351 changer transitions 2/1753 dead transitions. [2023-11-17 12:19:11,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1753 transitions, 31064 flow [2023-11-17 12:19:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:19:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:19:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 330 transitions. [2023-11-17 12:19:11,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2864583333333333 [2023-11-17 12:19:11,013 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 330 transitions. [2023-11-17 12:19:11,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 330 transitions. [2023-11-17 12:19:11,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:11,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 330 transitions. [2023-11-17 12:19:11,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 13.75) internal successors, (330), 24 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 48.0) internal successors, (1200), 25 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,016 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 48.0) internal successors, (1200), 25 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,016 INFO L175 Difference]: Start difference. First operand has 347 places, 1513 transitions, 24495 flow. Second operand 24 states and 330 transitions. [2023-11-17 12:19:11,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1753 transitions, 31064 flow [2023-11-17 12:19:12,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1753 transitions, 29341 flow, removed 647 selfloop flow, removed 13 redundant places. [2023-11-17 12:19:12,850 INFO L231 Difference]: Finished difference. Result has 362 places, 1607 transitions, 25823 flow [2023-11-17 12:19:12,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=22826, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=25823, PETRI_PLACES=362, PETRI_TRANSITIONS=1607} [2023-11-17 12:19:12,852 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 329 predicate places. [2023-11-17 12:19:12,853 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1607 transitions, 25823 flow [2023-11-17 12:19:12,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:12,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:12,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:12,860 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 12:19:13,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:19:13,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:13,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1127138670, now seen corresponding path program 10 times [2023-11-17 12:19:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980216399] [2023-11-17 12:19:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:13,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:14,111 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 12:19:14,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:14,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980216399] [2023-11-17 12:19:14,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980216399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:14,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049562122] [2023-11-17 12:19:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:19:14,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:14,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:14,113 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 12:19:14,116 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 12:19:14,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:19:14,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:14,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:19:14,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:14,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:14,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:19:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:14,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:14,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:14,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-17 12:19:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:14,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049562122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:14,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:14,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 28 [2023-11-17 12:19:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099164946] [2023-11-17 12:19:14,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:19:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:19:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-11-17 12:19:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:19:14,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1607 transitions, 25823 flow. Second operand has 30 states, 30 states have (on average 6.166666666666667) internal successors, (185), 30 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:14,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:14,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:19:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:21,495 INFO L124 PetriNetUnfolderBase]: 13632/19393 cut-off events. [2023-11-17 12:19:21,496 INFO L125 PetriNetUnfolderBase]: For 226481/226481 co-relation queries the response was YES. [2023-11-17 12:19:21,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147067 conditions, 19393 events. 13632/19393 cut-off events. For 226481/226481 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 112193 event pairs, 1239 based on Foata normal form. 2/19395 useless extension candidates. Maximal degree in co-relation 146510. Up to 14465 conditions per place. [2023-11-17 12:19:21,712 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 1029 selfloop transitions, 884 changer transitions 2/1915 dead transitions. [2023-11-17 12:19:21,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1915 transitions, 33176 flow [2023-11-17 12:19:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:19:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:19:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 416 transitions. [2023-11-17 12:19:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24074074074074073 [2023-11-17 12:19:21,714 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 416 transitions. [2023-11-17 12:19:21,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 416 transitions. [2023-11-17 12:19:21,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:21,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 416 transitions. [2023-11-17 12:19:21,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 11.555555555555555) internal successors, (416), 36 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:21,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:21,717 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:21,717 INFO L175 Difference]: Start difference. First operand has 362 places, 1607 transitions, 25823 flow. Second operand 36 states and 416 transitions. [2023-11-17 12:19:21,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1915 transitions, 33176 flow [2023-11-17 12:19:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1915 transitions, 32101 flow, removed 465 selfloop flow, removed 11 redundant places. [2023-11-17 12:19:23,498 INFO L231 Difference]: Finished difference. Result has 390 places, 1674 transitions, 28118 flow [2023-11-17 12:19:23,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=24833, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=28118, PETRI_PLACES=390, PETRI_TRANSITIONS=1674} [2023-11-17 12:19:23,500 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 357 predicate places. [2023-11-17 12:19:23,500 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1674 transitions, 28118 flow [2023-11-17 12:19:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.166666666666667) internal successors, (185), 30 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:23,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:23,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:23,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 12:19:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:19:23,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:23,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash -646303317, now seen corresponding path program 11 times [2023-11-17 12:19:23,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:23,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899919782] [2023-11-17 12:19:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:23,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899919782] [2023-11-17 12:19:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899919782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133078214] [2023-11-17 12:19:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:19:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:23,849 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 12:19:23,870 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 12:19:23,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:19:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:23,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:19:23,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:24,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:24,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133078214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:24,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:24,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-17 12:19:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186149924] [2023-11-17 12:19:24,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:24,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:19:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:19:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:19:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 48 [2023-11-17 12:19:24,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1674 transitions, 28118 flow. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:24,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:24,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 48 [2023-11-17 12:19:24,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:33,090 INFO L124 PetriNetUnfolderBase]: 21888/31091 cut-off events. [2023-11-17 12:19:33,091 INFO L125 PetriNetUnfolderBase]: For 344200/344200 co-relation queries the response was YES. [2023-11-17 12:19:33,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230708 conditions, 31091 events. 21888/31091 cut-off events. For 344200/344200 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 190643 event pairs, 6571 based on Foata normal form. 1/31092 useless extension candidates. Maximal degree in co-relation 230585. Up to 16299 conditions per place. [2023-11-17 12:19:33,776 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 2555 selfloop transitions, 12 changer transitions 0/2567 dead transitions. [2023-11-17 12:19:33,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 2567 transitions, 46360 flow [2023-11-17 12:19:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:19:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:19:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2023-11-17 12:19:33,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2023-11-17 12:19:33,777 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 124 transitions. [2023-11-17 12:19:33,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 124 transitions. [2023-11-17 12:19:33,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:33,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 124 transitions. [2023-11-17 12:19:33,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.5) internal successors, (124), 8 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 12:19:33,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:33,779 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:33,779 INFO L175 Difference]: Start difference. First operand has 390 places, 1674 transitions, 28118 flow. Second operand 8 states and 124 transitions. [2023-11-17 12:19:33,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 2567 transitions, 46360 flow [2023-11-17 12:19:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 2567 transitions, 44083 flow, removed 754 selfloop flow, removed 35 redundant places. [2023-11-17 12:19:37,359 INFO L231 Difference]: Finished difference. Result has 341 places, 1371 transitions, 20880 flow [2023-11-17 12:19:37,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=20856, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20880, PETRI_PLACES=341, PETRI_TRANSITIONS=1371} [2023-11-17 12:19:37,361 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 308 predicate places. [2023-11-17 12:19:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1371 transitions, 20880 flow [2023-11-17 12:19:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:37,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:37,369 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 12:19:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:19:37,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 675165637, now seen corresponding path program 12 times [2023-11-17 12:19:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83713885] [2023-11-17 12:19:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83713885] [2023-11-17 12:19:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83713885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244133354] [2023-11-17 12:19:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:19:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:37,677 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 12:19:37,696 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 12:19:37,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:19:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:37,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:19:37,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:37,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:19:37,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244133354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:37,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:37,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:19:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119314725] [2023-11-17 12:19:37,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:19:37,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:19:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:19:37,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 48 [2023-11-17 12:19:37,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1371 transitions, 20880 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:37,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:37,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 48 [2023-11-17 12:19:37,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:45,690 INFO L124 PetriNetUnfolderBase]: 20484/29948 cut-off events. [2023-11-17 12:19:45,691 INFO L125 PetriNetUnfolderBase]: For 350158/350158 co-relation queries the response was YES. [2023-11-17 12:19:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212075 conditions, 29948 events. 20484/29948 cut-off events. For 350158/350158 co-relation queries the response was YES. Maximal size of possible extension queue 1401. Compared 197639 event pairs, 2938 based on Foata normal form. 1860/31808 useless extension candidates. Maximal degree in co-relation 211961. Up to 16362 conditions per place. [2023-11-17 12:19:46,193 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 1428 selfloop transitions, 219 changer transitions 0/1647 dead transitions. [2023-11-17 12:19:46,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1647 transitions, 27838 flow [2023-11-17 12:19:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:19:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:19:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2023-11-17 12:19:46,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36574074074074076 [2023-11-17 12:19:46,194 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 158 transitions. [2023-11-17 12:19:46,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 158 transitions. [2023-11-17 12:19:46,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:46,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 158 transitions. [2023-11-17 12:19:46,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:46,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 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 12:19:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 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 12:19:46,196 INFO L175 Difference]: Start difference. First operand has 341 places, 1371 transitions, 20880 flow. Second operand 9 states and 158 transitions. [2023-11-17 12:19:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1647 transitions, 27838 flow [2023-11-17 12:19:49,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1647 transitions, 27522 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-11-17 12:19:49,029 INFO L231 Difference]: Finished difference. Result has 342 places, 1211 transitions, 18893 flow [2023-11-17 12:19:49,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=17854, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18893, PETRI_PLACES=342, PETRI_TRANSITIONS=1211} [2023-11-17 12:19:49,030 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 309 predicate places. [2023-11-17 12:19:49,030 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 1211 transitions, 18893 flow [2023-11-17 12:19:49,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:49,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:49,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:49,036 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 12:19:49,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:19:49,233 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:49,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1830967032, now seen corresponding path program 13 times [2023-11-17 12:19:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:49,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619057289] [2023-11-17 12:19:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:49,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:49,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619057289] [2023-11-17 12:19:49,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619057289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053459010] [2023-11-17 12:19:49,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:19:49,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:49,413 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 12:19:49,415 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 12:19:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:49,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:19:49,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:49,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053459010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:49,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:19:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394264052] [2023-11-17 12:19:49,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:49,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:19:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:19:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:19:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:19:49,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 1211 transitions, 18893 flow. Second operand has 15 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:49,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:49,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:19:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:53,940 INFO L124 PetriNetUnfolderBase]: 10244/15864 cut-off events. [2023-11-17 12:19:53,940 INFO L125 PetriNetUnfolderBase]: For 211062/211062 co-relation queries the response was YES. [2023-11-17 12:19:54,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117688 conditions, 15864 events. 10244/15864 cut-off events. For 211062/211062 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 105168 event pairs, 1886 based on Foata normal form. 1676/17540 useless extension candidates. Maximal degree in co-relation 117576. Up to 4842 conditions per place. [2023-11-17 12:19:54,092 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 650 selfloop transitions, 143 changer transitions 27/820 dead transitions. [2023-11-17 12:19:54,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 820 transitions, 14307 flow [2023-11-17 12:19:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:19:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:19:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2023-11-17 12:19:54,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3402777777777778 [2023-11-17 12:19:54,093 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 147 transitions. [2023-11-17 12:19:54,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 147 transitions. [2023-11-17 12:19:54,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:54,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 147 transitions. [2023-11-17 12:19:54,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:54,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 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 12:19:54,094 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 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 12:19:54,094 INFO L175 Difference]: Start difference. First operand has 342 places, 1211 transitions, 18893 flow. Second operand 9 states and 147 transitions. [2023-11-17 12:19:54,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 820 transitions, 14307 flow [2023-11-17 12:19:55,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 820 transitions, 13851 flow, removed 64 selfloop flow, removed 23 redundant places. [2023-11-17 12:19:55,544 INFO L231 Difference]: Finished difference. Result has 305 places, 706 transitions, 11222 flow [2023-11-17 12:19:55,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10827, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11222, PETRI_PLACES=305, PETRI_TRANSITIONS=706} [2023-11-17 12:19:55,545 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 272 predicate places. [2023-11-17 12:19:55,545 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 706 transitions, 11222 flow [2023-11-17 12:19:55,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.2) internal successors, (153), 15 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:55,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:55,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:55,549 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 12:19:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:55,746 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:55,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1877561174, now seen corresponding path program 14 times [2023-11-17 12:19:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915443562] [2023-11-17 12:19:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:19:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915443562] [2023-11-17 12:19:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915443562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612623004] [2023-11-17 12:19:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:19:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:55,861 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 12:19:55,884 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 12:19:56,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:19:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:56,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:19:56,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:19:56,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:19:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612623004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:56,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:56,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-17 12:19:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952648961] [2023-11-17 12:19:56,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:19:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:19:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:19:56,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:19:56,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 706 transitions, 11222 flow. Second operand has 20 states, 20 states have (on average 9.85) internal successors, (197), 20 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:56,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:56,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:19:56,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:00,338 INFO L124 PetriNetUnfolderBase]: 9543/14581 cut-off events. [2023-11-17 12:20:00,339 INFO L125 PetriNetUnfolderBase]: For 257799/257799 co-relation queries the response was YES. [2023-11-17 12:20:00,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123442 conditions, 14581 events. 9543/14581 cut-off events. For 257799/257799 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 94079 event pairs, 1224 based on Foata normal form. 1018/15599 useless extension candidates. Maximal degree in co-relation 123339. Up to 4537 conditions per place. [2023-11-17 12:20:00,469 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 581 selfloop transitions, 847 changer transitions 699/2127 dead transitions. [2023-11-17 12:20:00,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 2127 transitions, 38797 flow [2023-11-17 12:20:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 12:20:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 12:20:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 696 transitions. [2023-11-17 12:20:00,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2023-11-17 12:20:00,471 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 696 transitions. [2023-11-17 12:20:00,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 696 transitions. [2023-11-17 12:20:00,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:00,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 696 transitions. [2023-11-17 12:20:00,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 15.466666666666667) internal successors, (696), 45 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:00,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 48.0) internal successors, (2208), 46 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:00,475 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 48.0) internal successors, (2208), 46 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:00,475 INFO L175 Difference]: Start difference. First operand has 305 places, 706 transitions, 11222 flow. Second operand 45 states and 696 transitions. [2023-11-17 12:20:00,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 2127 transitions, 38797 flow [2023-11-17 12:20:01,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 2127 transitions, 38415 flow, removed 166 selfloop flow, removed 12 redundant places. [2023-11-17 12:20:02,020 INFO L231 Difference]: Finished difference. Result has 365 places, 1188 transitions, 24473 flow [2023-11-17 12:20:02,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10726, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=24473, PETRI_PLACES=365, PETRI_TRANSITIONS=1188} [2023-11-17 12:20:02,022 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 332 predicate places. [2023-11-17 12:20:02,022 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1188 transitions, 24473 flow [2023-11-17 12:20:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.85) internal successors, (197), 20 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:02,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:02,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:02,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:20:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:20:02,229 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:02,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1491835358, now seen corresponding path program 1 times [2023-11-17 12:20:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:02,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186671088] [2023-11-17 12:20:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:20:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186671088] [2023-11-17 12:20:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186671088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304431500] [2023-11-17 12:20:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:02,341 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 12:20:02,362 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 12:20:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:02,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:20:02,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:20:02,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:20:02,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304431500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:02,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:02,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:20:02,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911904086] [2023-11-17 12:20:02,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:02,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:20:02,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:20:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:20:02,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:02,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1188 transitions, 24473 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:02,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:02,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:02,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:04,688 INFO L124 PetriNetUnfolderBase]: 4031/6071 cut-off events. [2023-11-17 12:20:04,688 INFO L125 PetriNetUnfolderBase]: For 212492/212492 co-relation queries the response was YES. [2023-11-17 12:20:04,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66547 conditions, 6071 events. 4031/6071 cut-off events. For 212492/212492 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32289 event pairs, 1136 based on Foata normal form. 240/6311 useless extension candidates. Maximal degree in co-relation 66415. Up to 4332 conditions per place. [2023-11-17 12:20:04,749 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 612 selfloop transitions, 6 changer transitions 163/781 dead transitions. [2023-11-17 12:20:04,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 781 transitions, 17994 flow [2023-11-17 12:20:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:20:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:20:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2023-11-17 12:20:04,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2023-11-17 12:20:04,750 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 124 transitions. [2023-11-17 12:20:04,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 124 transitions. [2023-11-17 12:20:04,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:04,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 124 transitions. [2023-11-17 12:20:04,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.5) internal successors, (124), 8 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 12:20:04,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:04,751 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 48.0) internal successors, (432), 9 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:04,752 INFO L175 Difference]: Start difference. First operand has 365 places, 1188 transitions, 24473 flow. Second operand 8 states and 124 transitions. [2023-11-17 12:20:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 781 transitions, 17994 flow [2023-11-17 12:20:05,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 781 transitions, 12934 flow, removed 1578 selfloop flow, removed 53 redundant places. [2023-11-17 12:20:05,910 INFO L231 Difference]: Finished difference. Result has 275 places, 618 transitions, 9369 flow [2023-11-17 12:20:05,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10818, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9369, PETRI_PLACES=275, PETRI_TRANSITIONS=618} [2023-11-17 12:20:05,911 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 242 predicate places. [2023-11-17 12:20:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 618 transitions, 9369 flow [2023-11-17 12:20:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:05,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:05,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:05,917 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 12:20:06,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:06,112 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:06,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2121687301, now seen corresponding path program 15 times [2023-11-17 12:20:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760608007] [2023-11-17 12:20:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760608007] [2023-11-17 12:20:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760608007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849638956] [2023-11-17 12:20:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:20:06,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:06,257 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 12:20:06,284 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 12:20:06,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:20:06,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:06,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:06,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:06,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:06,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849638956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:06,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:06,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 12:20:06,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529133724] [2023-11-17 12:20:06,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:20:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:20:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:20:06,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:06,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 618 transitions, 9369 flow. Second operand has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 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 12:20:06,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:06,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:06,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:07,846 INFO L124 PetriNetUnfolderBase]: 3200/4609 cut-off events. [2023-11-17 12:20:07,847 INFO L125 PetriNetUnfolderBase]: For 96000/96000 co-relation queries the response was YES. [2023-11-17 12:20:07,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42127 conditions, 4609 events. 3200/4609 cut-off events. For 96000/96000 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21571 event pairs, 349 based on Foata normal form. 32/4641 useless extension candidates. Maximal degree in co-relation 42032. Up to 1927 conditions per place. [2023-11-17 12:20:07,893 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 425 selfloop transitions, 314 changer transitions 0/739 dead transitions. [2023-11-17 12:20:07,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 739 transitions, 12826 flow [2023-11-17 12:20:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:20:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:20:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2023-11-17 12:20:07,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:20:07,894 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 210 transitions. [2023-11-17 12:20:07,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 210 transitions. [2023-11-17 12:20:07,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:07,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 210 transitions. [2023-11-17 12:20:07,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.0) internal successors, (210), 14 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:07,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:07,896 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:07,896 INFO L175 Difference]: Start difference. First operand has 275 places, 618 transitions, 9369 flow. Second operand 14 states and 210 transitions. [2023-11-17 12:20:07,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 739 transitions, 12826 flow [2023-11-17 12:20:08,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 739 transitions, 11910 flow, removed 241 selfloop flow, removed 20 redundant places. [2023-11-17 12:20:08,284 INFO L231 Difference]: Finished difference. Result has 202 places, 636 transitions, 9774 flow [2023-11-17 12:20:08,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8513, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9774, PETRI_PLACES=202, PETRI_TRANSITIONS=636} [2023-11-17 12:20:08,285 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 169 predicate places. [2023-11-17 12:20:08,285 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 636 transitions, 9774 flow [2023-11-17 12:20:08,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 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 12:20:08,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:08,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:08,296 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 12:20:08,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:08,496 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:08,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -565144629, now seen corresponding path program 16 times [2023-11-17 12:20:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:08,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633664841] [2023-11-17 12:20:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633664841] [2023-11-17 12:20:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633664841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918804900] [2023-11-17 12:20:08,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:20:08,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:08,661 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 12:20:08,688 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 12:20:08,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:20:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:08,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:08,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:08,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918804900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:08,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:20:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200036633] [2023-11-17 12:20:08,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:20:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:20:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:20:08,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:08,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 636 transitions, 9774 flow. Second operand has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:10,460 INFO L124 PetriNetUnfolderBase]: 4614/6645 cut-off events. [2023-11-17 12:20:10,461 INFO L125 PetriNetUnfolderBase]: For 110443/110443 co-relation queries the response was YES. [2023-11-17 12:20:10,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59215 conditions, 6645 events. 4614/6645 cut-off events. For 110443/110443 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32378 event pairs, 256 based on Foata normal form. 14/6659 useless extension candidates. Maximal degree in co-relation 59135. Up to 2923 conditions per place. [2023-11-17 12:20:10,514 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 661 selfloop transitions, 567 changer transitions 0/1228 dead transitions. [2023-11-17 12:20:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1228 transitions, 21739 flow [2023-11-17 12:20:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:20:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:20:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 255 transitions. [2023-11-17 12:20:10,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:20:10,515 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 255 transitions. [2023-11-17 12:20:10,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 255 transitions. [2023-11-17 12:20:10,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:10,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 255 transitions. [2023-11-17 12:20:10,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 15.0) internal successors, (255), 17 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:10,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 48.0) internal successors, (864), 18 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:10,516 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 48.0) internal successors, (864), 18 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:10,517 INFO L175 Difference]: Start difference. First operand has 202 places, 636 transitions, 9774 flow. Second operand 17 states and 255 transitions. [2023-11-17 12:20:10,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1228 transitions, 21739 flow [2023-11-17 12:20:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1228 transitions, 20118 flow, removed 269 selfloop flow, removed 11 redundant places. [2023-11-17 12:20:10,898 INFO L231 Difference]: Finished difference. Result has 213 places, 913 transitions, 15304 flow [2023-11-17 12:20:10,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8884, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15304, PETRI_PLACES=213, PETRI_TRANSITIONS=913} [2023-11-17 12:20:10,899 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 180 predicate places. [2023-11-17 12:20:10,899 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 913 transitions, 15304 flow [2023-11-17 12:20:10,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:10,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:10,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:10,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:20:11,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:11,101 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -466110959, now seen corresponding path program 17 times [2023-11-17 12:20:11,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:11,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029825907] [2023-11-17 12:20:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:11,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029825907] [2023-11-17 12:20:11,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029825907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502959529] [2023-11-17 12:20:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:20:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:11,231 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 12:20:11,235 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 12:20:11,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:20:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:11,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:20:11,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:11,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:11,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502959529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:11,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:11,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-17 12:20:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208715347] [2023-11-17 12:20:11,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:20:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:11,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:20:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:20:11,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:11,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 913 transitions, 15304 flow. Second operand has 19 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 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 12:20:11,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:11,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:16,150 INFO L124 PetriNetUnfolderBase]: 6939/9862 cut-off events. [2023-11-17 12:20:16,150 INFO L125 PetriNetUnfolderBase]: For 163564/163564 co-relation queries the response was YES. [2023-11-17 12:20:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90626 conditions, 9862 events. 6939/9862 cut-off events. For 163564/163564 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 50131 event pairs, 139 based on Foata normal form. 20/9882 useless extension candidates. Maximal degree in co-relation 90543. Up to 4598 conditions per place. [2023-11-17 12:20:16,246 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 850 selfloop transitions, 1422 changer transitions 0/2272 dead transitions. [2023-11-17 12:20:16,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 2272 transitions, 41413 flow [2023-11-17 12:20:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-17 12:20:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-11-17 12:20:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 1430 transitions. [2023-11-17 12:20:16,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2920751633986928 [2023-11-17 12:20:16,249 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 1430 transitions. [2023-11-17 12:20:16,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 1430 transitions. [2023-11-17 12:20:16,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:16,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 1430 transitions. [2023-11-17 12:20:16,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 14.019607843137255) internal successors, (1430), 102 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:16,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 48.0) internal successors, (4944), 103 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:16,258 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 48.0) internal successors, (4944), 103 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:16,258 INFO L175 Difference]: Start difference. First operand has 213 places, 913 transitions, 15304 flow. Second operand 102 states and 1430 transitions. [2023-11-17 12:20:16,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 2272 transitions, 41413 flow [2023-11-17 12:20:17,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 2272 transitions, 40691 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-11-17 12:20:17,342 INFO L231 Difference]: Finished difference. Result has 340 places, 1745 transitions, 34289 flow [2023-11-17 12:20:17,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=14964, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=34289, PETRI_PLACES=340, PETRI_TRANSITIONS=1745} [2023-11-17 12:20:17,343 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 307 predicate places. [2023-11-17 12:20:17,343 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1745 transitions, 34289 flow [2023-11-17 12:20:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 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 12:20:17,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:17,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:17,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:20:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:17,545 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:17,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1708569789, now seen corresponding path program 18 times [2023-11-17 12:20:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:17,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888875254] [2023-11-17 12:20:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:17,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:17,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888875254] [2023-11-17 12:20:17,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888875254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:17,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213573446] [2023-11-17 12:20:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:20:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:17,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:17,689 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 12:20:17,713 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 12:20:17,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:20:17,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:17,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:17,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:17,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213573446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:18,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:20:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45728466] [2023-11-17 12:20:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:20:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:20:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:20:18,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:18,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1745 transitions, 34289 flow. Second operand has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:18,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:18,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:18,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:21,778 INFO L124 PetriNetUnfolderBase]: 7062/10053 cut-off events. [2023-11-17 12:20:21,778 INFO L125 PetriNetUnfolderBase]: For 197494/197494 co-relation queries the response was YES. [2023-11-17 12:20:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100571 conditions, 10053 events. 7062/10053 cut-off events. For 197494/197494 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 51535 event pairs, 657 based on Foata normal form. 20/10073 useless extension candidates. Maximal degree in co-relation 100456. Up to 4700 conditions per place. [2023-11-17 12:20:21,892 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 880 selfloop transitions, 1025 changer transitions 0/1905 dead transitions. [2023-11-17 12:20:21,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1905 transitions, 40858 flow [2023-11-17 12:20:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:20:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:20:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 272 transitions. [2023-11-17 12:20:21,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2023-11-17 12:20:21,893 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 272 transitions. [2023-11-17 12:20:21,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 272 transitions. [2023-11-17 12:20:21,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:21,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 272 transitions. [2023-11-17 12:20:21,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.11111111111111) internal successors, (272), 18 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:21,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:21,895 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 48.0) internal successors, (912), 19 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:21,895 INFO L175 Difference]: Start difference. First operand has 340 places, 1745 transitions, 34289 flow. Second operand 18 states and 272 transitions. [2023-11-17 12:20:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1905 transitions, 40858 flow [2023-11-17 12:20:23,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1905 transitions, 37443 flow, removed 1215 selfloop flow, removed 8 redundant places. [2023-11-17 12:20:23,676 INFO L231 Difference]: Finished difference. Result has 352 places, 1780 transitions, 34575 flow [2023-11-17 12:20:23,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=30948, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=990, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=34575, PETRI_PLACES=352, PETRI_TRANSITIONS=1780} [2023-11-17 12:20:23,677 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 319 predicate places. [2023-11-17 12:20:23,677 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1780 transitions, 34575 flow [2023-11-17 12:20:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.3) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:23,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:23,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:23,683 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 12:20:23,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 12:20:23,878 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:23,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 301630875, now seen corresponding path program 19 times [2023-11-17 12:20:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:23,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682999261] [2023-11-17 12:20:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682999261] [2023-11-17 12:20:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682999261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558975322] [2023-11-17 12:20:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:20:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:24,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:24,022 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 12:20:24,024 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 12:20:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:24,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:24,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:24,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:24,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558975322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:24,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:24,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-17 12:20:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753929477] [2023-11-17 12:20:24,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:20:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:20:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:20:24,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:24,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1780 transitions, 34575 flow. Second operand has 22 states, 22 states have (on average 9.181818181818182) internal successors, (202), 22 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 12:20:24,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:24,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:24,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:30,409 INFO L124 PetriNetUnfolderBase]: 10904/15359 cut-off events. [2023-11-17 12:20:30,410 INFO L125 PetriNetUnfolderBase]: For 285200/285200 co-relation queries the response was YES. [2023-11-17 12:20:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147866 conditions, 15359 events. 10904/15359 cut-off events. For 285200/285200 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 81151 event pairs, 230 based on Foata normal form. 14/15373 useless extension candidates. Maximal degree in co-relation 147751. Up to 7068 conditions per place. [2023-11-17 12:20:30,566 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 1473 selfloop transitions, 1752 changer transitions 0/3225 dead transitions. [2023-11-17 12:20:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 3225 transitions, 66940 flow [2023-11-17 12:20:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 12:20:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 12:20:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 724 transitions. [2023-11-17 12:20:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507751937984496 [2023-11-17 12:20:30,567 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 724 transitions. [2023-11-17 12:20:30,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 724 transitions. [2023-11-17 12:20:30,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:30,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 724 transitions. [2023-11-17 12:20:30,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 16.837209302325583) internal successors, (724), 43 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:30,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:30,571 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:30,571 INFO L175 Difference]: Start difference. First operand has 352 places, 1780 transitions, 34575 flow. Second operand 43 states and 724 transitions. [2023-11-17 12:20:30,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 3225 transitions, 66940 flow [2023-11-17 12:20:32,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 3225 transitions, 65299 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-11-17 12:20:32,879 INFO L231 Difference]: Finished difference. Result has 385 places, 2416 transitions, 51308 flow [2023-11-17 12:20:32,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=33303, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=51308, PETRI_PLACES=385, PETRI_TRANSITIONS=2416} [2023-11-17 12:20:32,880 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 352 predicate places. [2023-11-17 12:20:32,880 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 2416 transitions, 51308 flow [2023-11-17 12:20:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.181818181818182) internal successors, (202), 22 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 12:20:32,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:32,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:32,885 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 12:20:33,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 12:20:33,081 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:33,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1759380537, now seen corresponding path program 20 times [2023-11-17 12:20:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469793654] [2023-11-17 12:20:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:33,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:33,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:33,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469793654] [2023-11-17 12:20:33,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469793654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:33,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71405720] [2023-11-17 12:20:33,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:20:33,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:33,233 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 12:20:33,238 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 12:20:33,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:20:33,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:33,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:33,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:33,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:20:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71405720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-17 12:20:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695886711] [2023-11-17 12:20:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:20:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:20:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:20:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 2416 transitions, 51308 flow. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:33,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:33,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:33,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:40,542 INFO L124 PetriNetUnfolderBase]: 11559/16280 cut-off events. [2023-11-17 12:20:40,543 INFO L125 PetriNetUnfolderBase]: For 334748/334748 co-relation queries the response was YES. [2023-11-17 12:20:40,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164655 conditions, 16280 events. 11559/16280 cut-off events. For 334748/334748 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 87218 event pairs, 686 based on Foata normal form. 20/16300 useless extension candidates. Maximal degree in co-relation 164537. Up to 7578 conditions per place. [2023-11-17 12:20:40,743 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 1001 selfloop transitions, 1941 changer transitions 0/2942 dead transitions. [2023-11-17 12:20:40,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2942 transitions, 67434 flow [2023-11-17 12:20:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:20:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:20:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 444 transitions. [2023-11-17 12:20:40,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2023-11-17 12:20:40,745 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 444 transitions. [2023-11-17 12:20:40,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 444 transitions. [2023-11-17 12:20:40,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:40,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 444 transitions. [2023-11-17 12:20:40,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 15.857142857142858) internal successors, (444), 28 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:40,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:40,747 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 48.0) internal successors, (1392), 29 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:40,747 INFO L175 Difference]: Start difference. First operand has 385 places, 2416 transitions, 51308 flow. Second operand 28 states and 444 transitions. [2023-11-17 12:20:40,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2942 transitions, 67434 flow [2023-11-17 12:20:43,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 2942 transitions, 65870 flow, removed 48 selfloop flow, removed 10 redundant places. [2023-11-17 12:20:43,825 INFO L231 Difference]: Finished difference. Result has 409 places, 2642 transitions, 59607 flow [2023-11-17 12:20:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=49929, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=59607, PETRI_PLACES=409, PETRI_TRANSITIONS=2642} [2023-11-17 12:20:43,827 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 376 predicate places. [2023-11-17 12:20:43,828 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 2642 transitions, 59607 flow [2023-11-17 12:20:43,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:43,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:43,837 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 12:20:44,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:44,035 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:44,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1240326645, now seen corresponding path program 21 times [2023-11-17 12:20:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:44,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270960161] [2023-11-17 12:20:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:44,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:44,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270960161] [2023-11-17 12:20:44,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270960161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436232214] [2023-11-17 12:20:44,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:20:44,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:44,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:44,213 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 12:20:44,236 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 12:20:44,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:20:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:44,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:44,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:44,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436232214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:44,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:44,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-17 12:20:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567034954] [2023-11-17 12:20:44,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:20:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:20:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:20:44,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-17 12:20:44,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 2642 transitions, 59607 flow. Second operand has 22 states, 22 states have (on average 9.090909090909092) internal successors, (200), 22 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:44,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-17 12:20:44,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:52,713 INFO L124 PetriNetUnfolderBase]: 12129/17082 cut-off events. [2023-11-17 12:20:52,713 INFO L125 PetriNetUnfolderBase]: For 381080/381080 co-relation queries the response was YES. [2023-11-17 12:20:52,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180335 conditions, 17082 events. 12129/17082 cut-off events. For 381080/381080 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 92318 event pairs, 948 based on Foata normal form. 14/17096 useless extension candidates. Maximal degree in co-relation 180211. Up to 7892 conditions per place. [2023-11-17 12:20:52,906 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 1509 selfloop transitions, 1551 changer transitions 0/3060 dead transitions. [2023-11-17 12:20:52,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 3060 transitions, 73838 flow [2023-11-17 12:20:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:20:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:20:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 309 transitions. [2023-11-17 12:20:52,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321875 [2023-11-17 12:20:52,907 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 309 transitions. [2023-11-17 12:20:52,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 309 transitions. [2023-11-17 12:20:52,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:52,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 309 transitions. [2023-11-17 12:20:52,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 15.45) internal successors, (309), 20 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:52,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 48.0) internal successors, (1008), 21 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:52,909 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 48.0) internal successors, (1008), 21 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:52,909 INFO L175 Difference]: Start difference. First operand has 409 places, 2642 transitions, 59607 flow. Second operand 20 states and 309 transitions. [2023-11-17 12:20:52,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 3060 transitions, 73838 flow [2023-11-17 12:20:56,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 3060 transitions, 73006 flow, removed 81 selfloop flow, removed 13 redundant places. [2023-11-17 12:20:56,554 INFO L231 Difference]: Finished difference. Result has 418 places, 2747 transitions, 65302 flow [2023-11-17 12:20:56,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=58733, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=65302, PETRI_PLACES=418, PETRI_TRANSITIONS=2747} [2023-11-17 12:20:56,557 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 385 predicate places. [2023-11-17 12:20:56,557 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 2747 transitions, 65302 flow [2023-11-17 12:20:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.090909090909092) internal successors, (200), 22 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:56,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 12:20:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:56,764 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:56,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1197380463, now seen corresponding path program 2 times [2023-11-17 12:20:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:56,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968278882] [2023-11-17 12:20:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:20:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968278882] [2023-11-17 12:20:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968278882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438720939] [2023-11-17 12:20:57,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:20:57,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:57,906 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 12:20:57,908 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 12:20:58,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:20:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:58,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-17 12:20:58,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:58,487 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:20:58,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 12:20:58,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:58,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 31 [2023-11-17 12:20:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:20:58,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:59,440 INFO L349 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-11-17 12:20:59,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 290 treesize of output 454 [2023-11-17 12:20:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:20:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:20:59,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:59,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 142 treesize of output 230 [2023-11-17 12:21:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:21:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438720939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:21:43,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:21:43,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 42 [2023-11-17 12:21:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676881259] [2023-11-17 12:21:43,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:21:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 12:21:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 12:21:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1745, Unknown=1, NotChecked=0, Total=1892 [2023-11-17 12:21:43,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:21:43,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 2747 transitions, 65302 flow. Second operand has 44 states, 44 states have (on average 5.659090909090909) internal successors, (249), 44 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:43,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:43,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:21:43,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:58,936 INFO L124 PetriNetUnfolderBase]: 17773/25176 cut-off events. [2023-11-17 12:21:58,936 INFO L125 PetriNetUnfolderBase]: For 667399/667399 co-relation queries the response was YES. [2023-11-17 12:21:59,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278404 conditions, 25176 events. 17773/25176 cut-off events. For 667399/667399 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 143783 event pairs, 1091 based on Foata normal form. 2/25178 useless extension candidates. Maximal degree in co-relation 278281. Up to 19139 conditions per place. [2023-11-17 12:21:59,375 INFO L140 encePairwiseOnDemand]: 29/48 looper letters, 3284 selfloop transitions, 1148 changer transitions 1/4433 dead transitions. [2023-11-17 12:21:59,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 4433 transitions, 112973 flow [2023-11-17 12:21:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 12:21:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 12:21:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 518 transitions. [2023-11-17 12:21:59,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.250968992248062 [2023-11-17 12:21:59,377 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 518 transitions. [2023-11-17 12:21:59,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 518 transitions. [2023-11-17 12:21:59,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:59,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 518 transitions. [2023-11-17 12:21:59,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 12.046511627906977) internal successors, (518), 43 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:59,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:59,380 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 48.0) internal successors, (2112), 44 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:59,381 INFO L175 Difference]: Start difference. First operand has 418 places, 2747 transitions, 65302 flow. Second operand 43 states and 518 transitions. [2023-11-17 12:21:59,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 4433 transitions, 112973 flow [2023-11-17 12:22:07,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 4433 transitions, 112205 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-17 12:22:07,274 INFO L231 Difference]: Finished difference. Result has 478 places, 3752 transitions, 95128 flow [2023-11-17 12:22:07,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=64840, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=95128, PETRI_PLACES=478, PETRI_TRANSITIONS=3752} [2023-11-17 12:22:07,276 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 445 predicate places. [2023-11-17 12:22:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 3752 transitions, 95128 flow [2023-11-17 12:22:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.659090909090909) internal successors, (249), 44 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:07,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:07,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:07,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 12:22:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 12:22:07,487 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:22:07,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 162759529, now seen corresponding path program 3 times [2023-11-17 12:22:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445137227] [2023-11-17 12:22:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:22:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445137227] [2023-11-17 12:22:08,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445137227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755273435] [2023-11-17 12:22:08,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:22:08,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:08,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:08,437 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 12:22:08,439 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 12:22:08,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:22:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:08,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 12:22:08,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:09,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:22:09,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 31 [2023-11-17 12:22:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:22:09,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:09,614 INFO L349 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-11-17 12:22:09,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 326 [2023-11-17 12:22:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:22:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755273435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:14,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:14,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-11-17 12:22:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333007149] [2023-11-17 12:22:14,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:22:14,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:22:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 12:22:14,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 48 [2023-11-17 12:22:14,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 3752 transitions, 95128 flow. Second operand has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:14,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:14,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 48 [2023-11-17 12:22:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand