/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:23:10,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:23:10,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:23:10,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:23:10,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:23:10,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:23:10,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:23:10,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:23:10,846 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:23:10,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:23:10,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:23:10,847 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:23:10,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:23:10,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:23:10,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:23:10,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:23:10,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:23:10,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:23:10,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:23:10,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:23:10,849 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:23:10,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:23:10,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:23:10,850 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:23:10,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:23:10,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:23:10,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:23:10,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:23:10,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:23:10,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:23:10,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:23:10,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:23:10,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:23:11,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:23:11,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:23:11,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:23:11,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:23:11,035 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:23:11,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-17 16:23:12,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:23:12,338 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:23:12,339 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-17 16:23:12,344 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77fe01e4/80485cc28be44631a8cd5a8d85631838/FLAGbd0bf4636 [2023-11-17 16:23:12,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77fe01e4/80485cc28be44631a8cd5a8d85631838 [2023-11-17 16:23:12,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:23:12,355 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:23:12,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:23:12,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:23:12,359 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:23:12,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d70c6d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12, skipping insertion in model container [2023-11-17 16:23:12,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:23:12,499 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-17 16:23:12,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:23:12,510 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:23:12,524 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-queue-add-2-nl.wvr.c[2896,2909] [2023-11-17 16:23:12,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:23:12,531 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:23:12,531 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:23:12,536 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:23:12,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12 WrapperNode [2023-11-17 16:23:12,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:23:12,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:23:12,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:23:12,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:23:12,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,563 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2023-11-17 16:23:12,564 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:23:12,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:23:12,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:23:12,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:23:12,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:23:12,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:23:12,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:23:12,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:23:12,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (1/1) ... [2023-11-17 16:23:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:23:12,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:12,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:23:12,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:23:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:23:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:23:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:23:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:23:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:23:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:23:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:23:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:23:12,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:23:12,673 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:23:12,740 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:23:12,741 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:23:12,929 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:23:13,019 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:23:13,020 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:23:13,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:23:13 BoogieIcfgContainer [2023-11-17 16:23:13,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:23:13,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:23:13,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:23:13,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:23:13,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:23:12" (1/3) ... [2023-11-17 16:23:13,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750929a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:23:13, skipping insertion in model container [2023-11-17 16:23:13,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:23:12" (2/3) ... [2023-11-17 16:23:13,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750929a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:23:13, skipping insertion in model container [2023-11-17 16:23:13,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:23:13" (3/3) ... [2023-11-17 16:23:13,026 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-17 16:23:13,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:23:13,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:23:13,043 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:23:13,106 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:23:13,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 150 transitions, 314 flow [2023-11-17 16:23:13,193 INFO L124 PetriNetUnfolderBase]: 11/148 cut-off events. [2023-11-17 16:23:13,193 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:23:13,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 11/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2023-11-17 16:23:13,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 150 transitions, 314 flow [2023-11-17 16:23:13,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 139 transitions, 290 flow [2023-11-17 16:23:13,216 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:23:13,231 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 139 transitions, 290 flow [2023-11-17 16:23:13,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 139 transitions, 290 flow [2023-11-17 16:23:13,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 139 transitions, 290 flow [2023-11-17 16:23:13,273 INFO L124 PetriNetUnfolderBase]: 11/139 cut-off events. [2023-11-17 16:23:13,273 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:23:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 139 events. 11/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2023-11-17 16:23:13,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 816 [2023-11-17 16:23:16,452 INFO L134 LiptonReduction]: Checked pairs total: 895 [2023-11-17 16:23:16,453 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-17 16:23:16,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:23:16,481 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;@2288d094, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:23:16,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:23:16,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:23:16,488 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:23:16,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:23:16,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:16,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:16,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:16,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash -116407992, now seen corresponding path program 1 times [2023-11-17 16:23:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:16,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648143797] [2023-11-17 16:23:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:16,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:16,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648143797] [2023-11-17 16:23:16,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648143797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:16,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:16,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:23:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766538201] [2023-11-17 16:23:16,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:16,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:23:16,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:23:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:23:16,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-17 16:23:16,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:16,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:16,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-17 16:23:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:16,890 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-11-17 16:23:16,890 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-17 16:23:16,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 86 events. 48/86 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 9 based on Foata normal form. 4/69 useless extension candidates. Maximal degree in co-relation 144. Up to 65 conditions per place. [2023-11-17 16:23:16,893 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 20 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-17 16:23:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 107 flow [2023-11-17 16:23:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:23:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:23:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-11-17 16:23:16,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46734234234234234 [2023-11-17 16:23:16,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-11-17 16:23:16,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-11-17 16:23:16,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:16,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-11-17 16:23:16,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:16,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:16,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:16,925 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 415 transitions. [2023-11-17 16:23:16,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 107 flow [2023-11-17 16:23:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 23 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:23:16,929 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-17 16:23:16,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 16:23:16,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:23:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-17 16:23:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:16,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:16,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:23:16,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:16,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1551974074, now seen corresponding path program 2 times [2023-11-17 16:23:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:16,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448007715] [2023-11-17 16:23:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:17,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448007715] [2023-11-17 16:23:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448007715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:17,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:17,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:23:17,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072057540] [2023-11-17 16:23:17,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:17,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:23:17,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:23:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:23:17,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 296 [2023-11-17 16:23:17,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:17,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 296 [2023-11-17 16:23:17,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:17,207 INFO L124 PetriNetUnfolderBase]: 55/107 cut-off events. [2023-11-17 16:23:17,207 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 16:23:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 107 events. 55/107 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 234 event pairs, 32 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 90. Up to 87 conditions per place. [2023-11-17 16:23:17,208 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 18 selfloop transitions, 2 changer transitions 7/27 dead transitions. [2023-11-17 16:23:17,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 131 flow [2023-11-17 16:23:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:23:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:23:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-11-17 16:23:17,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214527027027027 [2023-11-17 16:23:17,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-11-17 16:23:17,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-11-17 16:23:17,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:17,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-11-17 16:23:17,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,214 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 499 transitions. [2023-11-17 16:23:17,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 131 flow [2023-11-17 16:23:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:23:17,216 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-17 16:23:17,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-17 16:23:17,216 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-17 16:23:17,216 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-17 16:23:17,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:17,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:23:17,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:17,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash -852200183, now seen corresponding path program 1 times [2023-11-17 16:23:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566372404] [2023-11-17 16:23:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:17,558 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 16:23:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566372404] [2023-11-17 16:23:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566372404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:17,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:23:17,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511707693] [2023-11-17 16:23:17,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:17,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:23:17,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:23:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:23:17,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 296 [2023-11-17 16:23:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 296 [2023-11-17 16:23:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:17,683 INFO L124 PetriNetUnfolderBase]: 64/122 cut-off events. [2023-11-17 16:23:17,683 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 16:23:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 122 events. 64/122 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 323 event pairs, 1 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 316. Up to 71 conditions per place. [2023-11-17 16:23:17,687 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 31 selfloop transitions, 9 changer transitions 5/45 dead transitions. [2023-11-17 16:23:17,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 227 flow [2023-11-17 16:23:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:23:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:23:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 957 transitions. [2023-11-17 16:23:17,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041385135135135 [2023-11-17 16:23:17,689 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 957 transitions. [2023-11-17 16:23:17,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 957 transitions. [2023-11-17 16:23:17,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:17,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 957 transitions. [2023-11-17 16:23:17,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,695 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,695 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 8 states and 957 transitions. [2023-11-17 16:23:17,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 227 flow [2023-11-17 16:23:17,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 219 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:23:17,698 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 112 flow [2023-11-17 16:23:17,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-17 16:23:17,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-17 16:23:17,699 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 112 flow [2023-11-17 16:23:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:17,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:23:17,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:17,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1611318765, now seen corresponding path program 2 times [2023-11-17 16:23:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:17,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402240038] [2023-11-17 16:23:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:17,975 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 16:23:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402240038] [2023-11-17 16:23:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402240038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:17,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:17,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:23:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811105775] [2023-11-17 16:23:17,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:17,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:23:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:23:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:23:17,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 296 [2023-11-17 16:23:17,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:17,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:17,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 296 [2023-11-17 16:23:17,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:18,110 INFO L124 PetriNetUnfolderBase]: 70/134 cut-off events. [2023-11-17 16:23:18,110 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-17 16:23:18,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 134 events. 70/134 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 11 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 440. Up to 98 conditions per place. [2023-11-17 16:23:18,111 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 28 selfloop transitions, 11 changer transitions 5/44 dead transitions. [2023-11-17 16:23:18,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 276 flow [2023-11-17 16:23:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:23:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:23:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-11-17 16:23:18,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40202702702702703 [2023-11-17 16:23:18,114 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:18,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,120 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 112 flow. Second operand 8 states and 952 transitions. [2023-11-17 16:23:18,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 276 flow [2023-11-17 16:23:18,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 244 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-17 16:23:18,122 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 165 flow [2023-11-17 16:23:18,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-17 16:23:18,123 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-17 16:23:18,123 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 165 flow [2023-11-17 16:23:18,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:18,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:23:18,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash 72141473, now seen corresponding path program 3 times [2023-11-17 16:23:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441238528] [2023-11-17 16:23:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:18,336 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 16:23:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:18,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441238528] [2023-11-17 16:23:18,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441238528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:18,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 16:23:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768745217] [2023-11-17 16:23:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:23:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:23:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:23:18,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 296 [2023-11-17 16:23:18,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:18,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 296 [2023-11-17 16:23:18,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:18,439 INFO L124 PetriNetUnfolderBase]: 66/130 cut-off events. [2023-11-17 16:23:18,439 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-17 16:23:18,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 130 events. 66/130 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 11 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 457. Up to 94 conditions per place. [2023-11-17 16:23:18,440 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-11-17 16:23:18,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 298 flow [2023-11-17 16:23:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:23:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:23:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-11-17 16:23:18,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40202702702702703 [2023-11-17 16:23:18,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:18,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-11-17 16:23:18,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,448 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 165 flow. Second operand 8 states and 952 transitions. [2023-11-17 16:23:18,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 298 flow [2023-11-17 16:23:18,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 281 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 16:23:18,450 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 184 flow [2023-11-17 16:23:18,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-17 16:23:18,451 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-17 16:23:18,451 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 184 flow [2023-11-17 16:23:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:18,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:23:18,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:18,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1749229271, now seen corresponding path program 1 times [2023-11-17 16:23:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292033245] [2023-11-17 16:23:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:18,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292033245] [2023-11-17 16:23:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292033245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387401562] [2023-11-17 16:23:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:18,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:18,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:23:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:18,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:23:18,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:18,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:18,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387401562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:18,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:18,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:23:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405752370] [2023-11-17 16:23:18,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:18,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:23:18,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:23:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:23:18,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 296 [2023-11-17 16:23:18,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 184 flow. Second operand has 12 states, 12 states have (on average 118.16666666666667) internal successors, (1418), 12 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:18,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 296 [2023-11-17 16:23:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:18,844 INFO L124 PetriNetUnfolderBase]: 106/217 cut-off events. [2023-11-17 16:23:18,844 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-11-17 16:23:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 217 events. 106/217 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 728 event pairs, 40 based on Foata normal form. 8/217 useless extension candidates. Maximal degree in co-relation 815. Up to 122 conditions per place. [2023-11-17 16:23:18,846 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 50 selfloop transitions, 7 changer transitions 4/61 dead transitions. [2023-11-17 16:23:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 479 flow [2023-11-17 16:23:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:23:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:23:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 736 transitions. [2023-11-17 16:23:18,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2023-11-17 16:23:18,848 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 736 transitions. [2023-11-17 16:23:18,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 736 transitions. [2023-11-17 16:23:18,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:18,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 736 transitions. [2023-11-17 16:23:18,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,852 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 184 flow. Second operand 6 states and 736 transitions. [2023-11-17 16:23:18,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 479 flow [2023-11-17 16:23:18,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 425 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-17 16:23:18,854 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 237 flow [2023-11-17 16:23:18,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-17 16:23:18,855 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-17 16:23:18,855 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 237 flow [2023-11-17 16:23:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 118.16666666666667) internal successors, (1418), 12 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:18,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:18,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:23:19,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1996485148, now seen corresponding path program 1 times [2023-11-17 16:23:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682857370] [2023-11-17 16:23:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682857370] [2023-11-17 16:23:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682857370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724481655] [2023-11-17 16:23:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:19,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:19,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:19,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:23:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:19,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:23:19,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:23:19,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724481655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:19,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-17 16:23:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615983890] [2023-11-17 16:23:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:23:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:23:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:23:19,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-17 16:23:19,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:19,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:19,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-17 16:23:19,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:19,310 INFO L124 PetriNetUnfolderBase]: 117/246 cut-off events. [2023-11-17 16:23:19,311 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-11-17 16:23:19,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 246 events. 117/246 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 902 event pairs, 23 based on Foata normal form. 20/246 useless extension candidates. Maximal degree in co-relation 662. Up to 95 conditions per place. [2023-11-17 16:23:19,312 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 36 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-11-17 16:23:19,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 429 flow [2023-11-17 16:23:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:23:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:23:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 561 transitions. [2023-11-17 16:23:19,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47381756756756754 [2023-11-17 16:23:19,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 561 transitions. [2023-11-17 16:23:19,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 561 transitions. [2023-11-17 16:23:19,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:19,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 561 transitions. [2023-11-17 16:23:19,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:19,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:19,317 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:19,317 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 237 flow. Second operand 4 states and 561 transitions. [2023-11-17 16:23:19,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 429 flow [2023-11-17 16:23:19,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 404 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-17 16:23:19,319 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 205 flow [2023-11-17 16:23:19,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-11-17 16:23:19,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-17 16:23:19,321 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 205 flow [2023-11-17 16:23:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:19,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:19,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:19,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 16:23:19,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:19,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1399666058, now seen corresponding path program 2 times [2023-11-17 16:23:19,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:19,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029795955] [2023-11-17 16:23:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:19,856 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 16:23:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029795955] [2023-11-17 16:23:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029795955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101420286] [2023-11-17 16:23:19,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:23:19,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:19,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:19,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:23:19,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:23:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:19,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:23:19,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:20,095 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 16:23:20,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:20,182 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:23:20,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-17 16:23:20,350 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 16:23:20,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101420286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:20,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:20,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 16:23:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12592439] [2023-11-17 16:23:20,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:20,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:23:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:23:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:23:20,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 296 [2023-11-17 16:23:20,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 205 flow. Second operand has 20 states, 20 states have (on average 106.25) internal successors, (2125), 20 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:20,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 296 [2023-11-17 16:23:20,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:20,874 INFO L124 PetriNetUnfolderBase]: 267/514 cut-off events. [2023-11-17 16:23:20,875 INFO L125 PetriNetUnfolderBase]: For 1025/1025 co-relation queries the response was YES. [2023-11-17 16:23:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 514 events. 267/514 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2219 event pairs, 39 based on Foata normal form. 20/444 useless extension candidates. Maximal degree in co-relation 1494. Up to 277 conditions per place. [2023-11-17 16:23:20,877 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 96 selfloop transitions, 47 changer transitions 0/143 dead transitions. [2023-11-17 16:23:20,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 143 transitions, 1102 flow [2023-11-17 16:23:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:23:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:23:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1988 transitions. [2023-11-17 16:23:20,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3731231231231231 [2023-11-17 16:23:20,882 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1988 transitions. [2023-11-17 16:23:20,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1988 transitions. [2023-11-17 16:23:20,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:20,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1988 transitions. [2023-11-17 16:23:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.44444444444444) internal successors, (1988), 18 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,893 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,893 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 205 flow. Second operand 18 states and 1988 transitions. [2023-11-17 16:23:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 143 transitions, 1102 flow [2023-11-17 16:23:20,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 143 transitions, 971 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-11-17 16:23:20,898 INFO L231 Difference]: Finished difference. Result has 61 places, 79 transitions, 680 flow [2023-11-17 16:23:20,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=680, PETRI_PLACES=61, PETRI_TRANSITIONS=79} [2023-11-17 16:23:20,901 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-11-17 16:23:20,901 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 79 transitions, 680 flow [2023-11-17 16:23:20,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.25) internal successors, (2125), 20 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:20,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:20,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:21,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:21,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:21,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1248056012, now seen corresponding path program 3 times [2023-11-17 16:23:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179774593] [2023-11-17 16:23:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:21,511 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 16:23:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179774593] [2023-11-17 16:23:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179774593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:21,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237078910] [2023-11-17 16:23:21,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:23:21,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:21,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:23:21,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:23:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:21,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:23:21,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:21,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:21,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:23:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:21,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:21,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:21,766 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 45 treesize of output 37 [2023-11-17 16:23:21,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:23:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:21,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237078910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:21,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:21,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-11-17 16:23:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498162250] [2023-11-17 16:23:21,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:23:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:23:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=228, Unknown=1, NotChecked=0, Total=272 [2023-11-17 16:23:21,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 296 [2023-11-17 16:23:21,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 79 transitions, 680 flow. Second operand has 17 states, 17 states have (on average 101.52941176470588) internal successors, (1726), 17 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:21,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:21,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 296 [2023-11-17 16:23:21,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:22,162 INFO L124 PetriNetUnfolderBase]: 303/567 cut-off events. [2023-11-17 16:23:22,163 INFO L125 PetriNetUnfolderBase]: For 1657/1657 co-relation queries the response was YES. [2023-11-17 16:23:22,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 567 events. 303/567 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2418 event pairs, 44 based on Foata normal form. 22/517 useless extension candidates. Maximal degree in co-relation 2180. Up to 275 conditions per place. [2023-11-17 16:23:22,166 INFO L140 encePairwiseOnDemand]: 289/296 looper letters, 87 selfloop transitions, 27 changer transitions 1/115 dead transitions. [2023-11-17 16:23:22,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 1147 flow [2023-11-17 16:23:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:23:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:23:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1147 transitions. [2023-11-17 16:23:22,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2023-11-17 16:23:22,169 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1147 transitions. [2023-11-17 16:23:22,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1147 transitions. [2023-11-17 16:23:22,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:22,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1147 transitions. [2023-11-17 16:23:22,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.27272727272727) internal successors, (1147), 11 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:22,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 296.0) internal successors, (3552), 12 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:22,175 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 296.0) internal successors, (3552), 12 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:22,175 INFO L175 Difference]: Start difference. First operand has 61 places, 79 transitions, 680 flow. Second operand 11 states and 1147 transitions. [2023-11-17 16:23:22,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 1147 flow [2023-11-17 16:23:22,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1073 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-11-17 16:23:22,181 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 774 flow [2023-11-17 16:23:22,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=774, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2023-11-17 16:23:22,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-11-17 16:23:22,182 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 774 flow [2023-11-17 16:23:22,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 101.52941176470588) internal successors, (1726), 17 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:22,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:22,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:22,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:23:22,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:22,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -794220925, now seen corresponding path program 1 times [2023-11-17 16:23:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:22,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174742705] [2023-11-17 16:23:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174742705] [2023-11-17 16:23:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174742705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288824952] [2023-11-17 16:23:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:23,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:23,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:23,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:23:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:23,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:23:23,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:23,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:24,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:24,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-17 16:23:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288824952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:24,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:23:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15011787] [2023-11-17 16:23:24,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:24,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:23:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:23:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:23:24,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:23:24,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 774 flow. Second operand has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:24,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:24,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:23:24,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:27,701 INFO L124 PetriNetUnfolderBase]: 490/921 cut-off events. [2023-11-17 16:23:27,701 INFO L125 PetriNetUnfolderBase]: For 3053/3053 co-relation queries the response was YES. [2023-11-17 16:23:27,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 921 events. 490/921 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4644 event pairs, 54 based on Foata normal form. 5/867 useless extension candidates. Maximal degree in co-relation 3686. Up to 532 conditions per place. [2023-11-17 16:23:27,709 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 134 selfloop transitions, 87 changer transitions 22/243 dead transitions. [2023-11-17 16:23:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 243 transitions, 2210 flow [2023-11-17 16:23:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:23:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:23:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2953 transitions. [2023-11-17 16:23:27,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3023136773136773 [2023-11-17 16:23:27,727 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2953 transitions. [2023-11-17 16:23:27,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2953 transitions. [2023-11-17 16:23:27,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:27,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2953 transitions. [2023-11-17 16:23:27,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 89.48484848484848) internal successors, (2953), 33 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:27,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 296.0) internal successors, (10064), 34 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:27,766 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 296.0) internal successors, (10064), 34 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:27,767 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 774 flow. Second operand 33 states and 2953 transitions. [2023-11-17 16:23:27,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 243 transitions, 2210 flow [2023-11-17 16:23:27,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 243 transitions, 2138 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-17 16:23:27,789 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1607 flow [2023-11-17 16:23:27,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1607, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2023-11-17 16:23:27,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-11-17 16:23:27,806 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1607 flow [2023-11-17 16:23:27,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:27,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:27,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:27,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 16:23:28,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:28,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2120598555, now seen corresponding path program 2 times [2023-11-17 16:23:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:28,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484562123] [2023-11-17 16:23:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:28,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484562123] [2023-11-17 16:23:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484562123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290783014] [2023-11-17 16:23:28,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:23:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:28,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:28,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:23:28,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:23:28,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:28,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 16:23:28,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:23:29,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:29,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:29,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-17 16:23:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290783014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:29,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-11-17 16:23:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350132063] [2023-11-17 16:23:29,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:29,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:23:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:23:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-11-17 16:23:29,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:23:29,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1607 flow. Second operand has 27 states, 27 states have (on average 85.96296296296296) internal successors, (2321), 27 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:29,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:29,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:23:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:30,287 INFO L124 PetriNetUnfolderBase]: 491/933 cut-off events. [2023-11-17 16:23:30,287 INFO L125 PetriNetUnfolderBase]: For 6127/6127 co-relation queries the response was YES. [2023-11-17 16:23:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5623 conditions, 933 events. 491/933 cut-off events. For 6127/6127 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4811 event pairs, 107 based on Foata normal form. 2/888 useless extension candidates. Maximal degree in co-relation 5527. Up to 779 conditions per place. [2023-11-17 16:23:30,295 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 148 selfloop transitions, 41 changer transitions 6/195 dead transitions. [2023-11-17 16:23:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 195 transitions, 2292 flow [2023-11-17 16:23:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:23:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:23:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1604 transitions. [2023-11-17 16:23:30,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30105105105105107 [2023-11-17 16:23:30,300 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1604 transitions. [2023-11-17 16:23:30,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1604 transitions. [2023-11-17 16:23:30,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:30,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1604 transitions. [2023-11-17 16:23:30,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 89.11111111111111) internal successors, (1604), 18 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:30,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:30,309 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:30,309 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1607 flow. Second operand 18 states and 1604 transitions. [2023-11-17 16:23:30,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 195 transitions, 2292 flow [2023-11-17 16:23:30,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 195 transitions, 2083 flow, removed 99 selfloop flow, removed 8 redundant places. [2023-11-17 16:23:30,336 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1635 flow [2023-11-17 16:23:30,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1635, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2023-11-17 16:23:30,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-11-17 16:23:30,337 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1635 flow [2023-11-17 16:23:30,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.96296296296296) internal successors, (2321), 27 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:30,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 16:23:30,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:30,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:30,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash -399379649, now seen corresponding path program 3 times [2023-11-17 16:23:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:30,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926703625] [2023-11-17 16:23:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:31,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926703625] [2023-11-17 16:23:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926703625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302540925] [2023-11-17 16:23:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:23:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:31,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:31,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:23:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:23:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:31,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:23:31,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:31,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:31,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-17 16:23:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:31,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:32,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:32,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-17 16:23:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:32,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302540925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:32,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:23:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708419243] [2023-11-17 16:23:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:23:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:23:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:23:32,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:23:32,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1635 flow. Second operand has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:32,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:32,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:23:32,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:34,418 INFO L124 PetriNetUnfolderBase]: 624/1183 cut-off events. [2023-11-17 16:23:34,419 INFO L125 PetriNetUnfolderBase]: For 11496/11496 co-relation queries the response was YES. [2023-11-17 16:23:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1183 events. 624/1183 cut-off events. For 11496/11496 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6481 event pairs, 76 based on Foata normal form. 5/1135 useless extension candidates. Maximal degree in co-relation 7297. Up to 650 conditions per place. [2023-11-17 16:23:34,427 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 156 selfloop transitions, 121 changer transitions 28/305 dead transitions. [2023-11-17 16:23:34,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 305 transitions, 3486 flow [2023-11-17 16:23:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:23:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:23:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3143 transitions. [2023-11-17 16:23:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3033783783783784 [2023-11-17 16:23:34,431 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3143 transitions. [2023-11-17 16:23:34,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3143 transitions. [2023-11-17 16:23:34,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:34,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3143 transitions. [2023-11-17 16:23:34,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 89.8) internal successors, (3143), 35 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:34,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:34,443 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:34,443 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1635 flow. Second operand 35 states and 3143 transitions. [2023-11-17 16:23:34,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 305 transitions, 3486 flow [2023-11-17 16:23:34,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 305 transitions, 3334 flow, removed 47 selfloop flow, removed 12 redundant places. [2023-11-17 16:23:34,492 INFO L231 Difference]: Finished difference. Result has 157 places, 196 transitions, 2587 flow [2023-11-17 16:23:34,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2587, PETRI_PLACES=157, PETRI_TRANSITIONS=196} [2023-11-17 16:23:34,494 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-11-17 16:23:34,494 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 196 transitions, 2587 flow [2023-11-17 16:23:34,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:34,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:34,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:23:34,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:34,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:34,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash -704768901, now seen corresponding path program 4 times [2023-11-17 16:23:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743637652] [2023-11-17 16:23:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:35,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743637652] [2023-11-17 16:23:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743637652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364337647] [2023-11-17 16:23:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:23:35,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:35,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:35,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:23:35,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:23:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:35,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:23:35,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:35,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:35,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:35,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-17 16:23:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364337647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:36,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:36,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:23:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713513453] [2023-11-17 16:23:36,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:36,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:23:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:23:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:23:36,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:23:36,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 196 transitions, 2587 flow. Second operand has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:36,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:36,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:23:36,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:39,030 INFO L124 PetriNetUnfolderBase]: 760/1445 cut-off events. [2023-11-17 16:23:39,030 INFO L125 PetriNetUnfolderBase]: For 15340/15340 co-relation queries the response was YES. [2023-11-17 16:23:39,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 1445 events. 760/1445 cut-off events. For 15340/15340 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8414 event pairs, 110 based on Foata normal form. 5/1399 useless extension candidates. Maximal degree in co-relation 9517. Up to 1038 conditions per place. [2023-11-17 16:23:39,043 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 212 selfloop transitions, 105 changer transitions 17/334 dead transitions. [2023-11-17 16:23:39,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 334 transitions, 4502 flow [2023-11-17 16:23:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:23:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:23:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2667 transitions. [2023-11-17 16:23:39,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30033783783783785 [2023-11-17 16:23:39,048 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2667 transitions. [2023-11-17 16:23:39,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2667 transitions. [2023-11-17 16:23:39,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:39,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2667 transitions. [2023-11-17 16:23:39,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 88.9) internal successors, (2667), 30 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:39,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:39,061 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:39,061 INFO L175 Difference]: Start difference. First operand has 157 places, 196 transitions, 2587 flow. Second operand 30 states and 2667 transitions. [2023-11-17 16:23:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 334 transitions, 4502 flow [2023-11-17 16:23:39,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 334 transitions, 3716 flow, removed 331 selfloop flow, removed 23 redundant places. [2023-11-17 16:23:39,147 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3094 flow [2023-11-17 16:23:39,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3094, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2023-11-17 16:23:39,147 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2023-11-17 16:23:39,147 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3094 flow [2023-11-17 16:23:39,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:39,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:39,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:39,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:39,353 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,SelfDestructingSolverStorable12 [2023-11-17 16:23:39,353 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:39,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 792819973, now seen corresponding path program 5 times [2023-11-17 16:23:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510629918] [2023-11-17 16:23:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:39,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510629918] [2023-11-17 16:23:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510629918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244400438] [2023-11-17 16:23:39,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:23:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:39,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:39,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:23:40,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:23:40,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:40,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 16:23:40,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:40,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-17 16:23:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:40,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:40,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:40,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-17 16:23:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:41,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244400438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:41,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:41,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:23:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633952078] [2023-11-17 16:23:41,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:23:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:23:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:23:41,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:23:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3094 flow. Second operand has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:41,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:23:41,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:43,994 INFO L124 PetriNetUnfolderBase]: 845/1630 cut-off events. [2023-11-17 16:23:43,994 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2023-11-17 16:23:44,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9920 conditions, 1630 events. 845/1630 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9857 event pairs, 141 based on Foata normal form. 5/1576 useless extension candidates. Maximal degree in co-relation 9849. Up to 1220 conditions per place. [2023-11-17 16:23:44,006 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 235 selfloop transitions, 118 changer transitions 24/377 dead transitions. [2023-11-17 16:23:44,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 377 transitions, 4866 flow [2023-11-17 16:23:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:23:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:23:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2407 transitions. [2023-11-17 16:23:44,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011761761761762 [2023-11-17 16:23:44,009 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2407 transitions. [2023-11-17 16:23:44,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2407 transitions. [2023-11-17 16:23:44,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:44,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2407 transitions. [2023-11-17 16:23:44,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.14814814814815) internal successors, (2407), 27 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 296.0) internal successors, (8288), 28 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,018 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 296.0) internal successors, (8288), 28 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,018 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3094 flow. Second operand 27 states and 2407 transitions. [2023-11-17 16:23:44,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 377 transitions, 4866 flow [2023-11-17 16:23:44,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 377 transitions, 4651 flow, removed 82 selfloop flow, removed 12 redundant places. [2023-11-17 16:23:44,077 INFO L231 Difference]: Finished difference. Result has 196 places, 294 transitions, 3937 flow [2023-11-17 16:23:44,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3937, PETRI_PLACES=196, PETRI_TRANSITIONS=294} [2023-11-17 16:23:44,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2023-11-17 16:23:44,078 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 294 transitions, 3937 flow [2023-11-17 16:23:44,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:44,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:23:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:44,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:23:44,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:23:44,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -56144631, now seen corresponding path program 6 times [2023-11-17 16:23:44,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:44,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024221662] [2023-11-17 16:23:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:44,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024221662] [2023-11-17 16:23:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024221662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778007541] [2023-11-17 16:23:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:23:45,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:45,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:45,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:23:45,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:23:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:45,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:23:45,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:45,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:45,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:23:45,777 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-17 16:23:45,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-17 16:23:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:45,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:46,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:46,199 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 63 treesize of output 55 [2023-11-17 16:23:46,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-11-17 16:23:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:46,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778007541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:46,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:46,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:23:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059433688] [2023-11-17 16:23:46,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:23:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:23:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2023-11-17 16:23:46,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:23:46,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 294 transitions, 3937 flow. Second operand has 35 states, 35 states have (on average 77.54285714285714) internal successors, (2714), 35 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:46,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:23:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:49,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:23:53,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:23:56,447 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse10 (select |c_#memory_int| c_~q~0.base)) (.cse12 (+ (* c_~q_front~0 4) c_~q~0.offset)) (.cse11 (* c_~C~0 2))) (let ((.cse9 (mod (+ c_~y~0 .cse11) 4294967296)) (.cse6 (select .cse10 .cse12))) (let ((.cse0 (mod c_~x~0 4294967296)) (.cse8 (= (+ c_~s~0 .cse6) c_~N~0)) (.cse7 (= .cse9 (mod (+ c_~C~0 c_~x~0) 4294967296))) (.cse1 (< c_~n~0 (+ c_~q_back~0 1))) (.cse2 (< c_~q_back~0 0)) (.cse3 (< c_~n~0 (+ c_~q_front~0 1))) (.cse4 (< c_~q_front~0 0)) (.cse5 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) (and (= (mod (+ c_~C~0 c_~y~0) 4294967296) .cse0) (or .cse1 .cse2 .cse3 .cse4 .cse5 (and (= c_~N~0 .cse6) .cse7)) (or (< c_~q_front~0 1) (< c_~n~0 3)) (or .cse3 (and .cse8 (= .cse0 .cse9)) .cse4) (= c_~s~0 c_~N~0) (or (and (= c_~y~0 0) (= c_~N~0 (select .cse10 0)) (= .cse11 c_~x~0) (= c_~s~0 0)) (not (= c_~q_front~0 0))) (= c_~q~0.offset 0) (or .cse1 .cse2 .cse3 (and (forall ((v_ArrVal_330 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_330) c_~q~0.base) .cse12) c_~N~0)) .cse7) .cse4 .cse5) (or (and .cse8 .cse7) .cse1 .cse2 .cse3 .cse4 .cse5))))) is different from false [2023-11-17 16:23:59,799 INFO L124 PetriNetUnfolderBase]: 1297/2586 cut-off events. [2023-11-17 16:23:59,799 INFO L125 PetriNetUnfolderBase]: For 25678/25678 co-relation queries the response was YES. [2023-11-17 16:23:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17507 conditions, 2586 events. 1297/2586 cut-off events. For 25678/25678 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 17875 event pairs, 91 based on Foata normal form. 43/2510 useless extension candidates. Maximal degree in co-relation 17257. Up to 943 conditions per place. [2023-11-17 16:23:59,820 INFO L140 encePairwiseOnDemand]: 283/296 looper letters, 222 selfloop transitions, 346 changer transitions 70/638 dead transitions. [2023-11-17 16:23:59,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 638 transitions, 9379 flow [2023-11-17 16:23:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:23:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:23:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4004 transitions. [2023-11-17 16:23:59,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27606177606177607 [2023-11-17 16:23:59,825 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4004 transitions. [2023-11-17 16:23:59,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4004 transitions. [2023-11-17 16:23:59,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:59,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4004 transitions. [2023-11-17 16:23:59,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 81.71428571428571) internal successors, (4004), 49 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:59,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 296.0) internal successors, (14800), 50 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:59,837 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 296.0) internal successors, (14800), 50 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:59,837 INFO L175 Difference]: Start difference. First operand has 196 places, 294 transitions, 3937 flow. Second operand 49 states and 4004 transitions. [2023-11-17 16:23:59,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 638 transitions, 9379 flow [2023-11-17 16:23:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 638 transitions, 8971 flow, removed 186 selfloop flow, removed 13 redundant places. [2023-11-17 16:23:59,995 INFO L231 Difference]: Finished difference. Result has 250 places, 464 transitions, 7735 flow [2023-11-17 16:23:59,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7735, PETRI_PLACES=250, PETRI_TRANSITIONS=464} [2023-11-17 16:23:59,996 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2023-11-17 16:23:59,996 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 464 transitions, 7735 flow [2023-11-17 16:23:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 77.54285714285714) internal successors, (2714), 35 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:59,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:59,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:00,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:00,201 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,SelfDestructingSolverStorable14 [2023-11-17 16:24:00,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:00,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash -331870473, now seen corresponding path program 7 times [2023-11-17 16:24:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:00,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165804083] [2023-11-17 16:24:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:00,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:00,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165804083] [2023-11-17 16:24:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165804083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822094022] [2023-11-17 16:24:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:24:00,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:00,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:00,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:24:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:00,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 16:24:00,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:01,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:24:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:01,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:01,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:01,638 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 63 treesize of output 55 [2023-11-17 16:24:01,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-11-17 16:24:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822094022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:02,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:02,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:24:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138136748] [2023-11-17 16:24:02,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:24:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:24:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1050, Unknown=1, NotChecked=0, Total=1190 [2023-11-17 16:24:02,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:24:02,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 464 transitions, 7735 flow. Second operand has 35 states, 35 states have (on average 80.54285714285714) internal successors, (2819), 35 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:02,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:24:02,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:04,314 INFO L124 PetriNetUnfolderBase]: 1289/2548 cut-off events. [2023-11-17 16:24:04,314 INFO L125 PetriNetUnfolderBase]: For 33575/33575 co-relation queries the response was YES. [2023-11-17 16:24:04,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 2548 events. 1289/2548 cut-off events. For 33575/33575 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17469 event pairs, 106 based on Foata normal form. 2/2482 useless extension candidates. Maximal degree in co-relation 19828. Up to 1603 conditions per place. [2023-11-17 16:24:04,337 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 325 selfloop transitions, 237 changer transitions 19/581 dead transitions. [2023-11-17 16:24:04,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 581 transitions, 10348 flow [2023-11-17 16:24:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:24:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:24:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2277 transitions. [2023-11-17 16:24:04,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2849099099099099 [2023-11-17 16:24:04,354 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2277 transitions. [2023-11-17 16:24:04,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2277 transitions. [2023-11-17 16:24:04,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:04,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2277 transitions. [2023-11-17 16:24:04,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 84.33333333333333) internal successors, (2277), 27 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:04,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 296.0) internal successors, (8288), 28 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:04,361 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 296.0) internal successors, (8288), 28 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:04,361 INFO L175 Difference]: Start difference. First operand has 250 places, 464 transitions, 7735 flow. Second operand 27 states and 2277 transitions. [2023-11-17 16:24:04,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 581 transitions, 10348 flow [2023-11-17 16:24:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 581 transitions, 8668 flow, removed 809 selfloop flow, removed 21 redundant places. [2023-11-17 16:24:04,692 INFO L231 Difference]: Finished difference. Result has 251 places, 497 transitions, 7747 flow [2023-11-17 16:24:04,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7747, PETRI_PLACES=251, PETRI_TRANSITIONS=497} [2023-11-17 16:24:04,692 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2023-11-17 16:24:04,692 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 497 transitions, 7747 flow [2023-11-17 16:24:04,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.54285714285714) internal successors, (2819), 35 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:04,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:04,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:04,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:04,897 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,SelfDestructingSolverStorable15 [2023-11-17 16:24:04,898 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:04,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1511789443, now seen corresponding path program 8 times [2023-11-17 16:24:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:04,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245404076] [2023-11-17 16:24:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245404076] [2023-11-17 16:24:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245404076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468894307] [2023-11-17 16:24:05,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:24:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:05,578 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:05,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:24:06,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:24:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:06,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:24:06,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:06,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-11-17 16:24:06,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:24:06,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-17 16:24:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:06,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:06,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:06,898 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 63 treesize of output 55 [2023-11-17 16:24:06,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-11-17 16:24:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:07,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468894307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:07,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:07,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:24:07,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777446647] [2023-11-17 16:24:07,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:07,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:24:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:24:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1016, Unknown=2, NotChecked=0, Total=1190 [2023-11-17 16:24:07,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:24:07,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 497 transitions, 7747 flow. Second operand has 35 states, 35 states have (on average 80.54285714285714) internal successors, (2819), 35 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:07,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:07,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:24:07,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:10,059 INFO L124 PetriNetUnfolderBase]: 1360/2677 cut-off events. [2023-11-17 16:24:10,060 INFO L125 PetriNetUnfolderBase]: For 25644/25644 co-relation queries the response was YES. [2023-11-17 16:24:10,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 2677 events. 1360/2677 cut-off events. For 25644/25644 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 18287 event pairs, 181 based on Foata normal form. 4/2620 useless extension candidates. Maximal degree in co-relation 19390. Up to 1969 conditions per place. [2023-11-17 16:24:10,083 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 340 selfloop transitions, 260 changer transitions 19/619 dead transitions. [2023-11-17 16:24:10,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 619 transitions, 10145 flow [2023-11-17 16:24:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:24:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:24:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2687 transitions. [2023-11-17 16:24:10,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2836782094594595 [2023-11-17 16:24:10,086 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2687 transitions. [2023-11-17 16:24:10,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2687 transitions. [2023-11-17 16:24:10,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:10,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2687 transitions. [2023-11-17 16:24:10,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 83.96875) internal successors, (2687), 32 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:10,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 296.0) internal successors, (9768), 33 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:10,093 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 296.0) internal successors, (9768), 33 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:10,093 INFO L175 Difference]: Start difference. First operand has 251 places, 497 transitions, 7747 flow. Second operand 32 states and 2687 transitions. [2023-11-17 16:24:10,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 619 transitions, 10145 flow [2023-11-17 16:24:10,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 619 transitions, 9992 flow, removed 48 selfloop flow, removed 16 redundant places. [2023-11-17 16:24:10,287 INFO L231 Difference]: Finished difference. Result has 272 places, 534 transitions, 8961 flow [2023-11-17 16:24:10,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=7616, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8961, PETRI_PLACES=272, PETRI_TRANSITIONS=534} [2023-11-17 16:24:10,288 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2023-11-17 16:24:10,288 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 534 transitions, 8961 flow [2023-11-17 16:24:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.54285714285714) internal successors, (2819), 35 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:10,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:10,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:10,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:24:10,493 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,SelfDestructingSolverStorable16 [2023-11-17 16:24:10,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:10,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash -8632095, now seen corresponding path program 9 times [2023-11-17 16:24:10,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:10,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177539076] [2023-11-17 16:24:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:10,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:11,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177539076] [2023-11-17 16:24:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177539076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648869173] [2023-11-17 16:24:11,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:24:11,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:11,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:11,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:11,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:24:11,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:24:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:11,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:24:11,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:11,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:24:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:24:11,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:11,793 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_419 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_419) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)))) (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296))) is different from false [2023-11-17 16:24:11,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:11,842 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 63 treesize of output 55 [2023-11-17 16:24:11,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-11-17 16:24:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648869173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:12,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:12,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2023-11-17 16:24:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541377290] [2023-11-17 16:24:12,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:24:12,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:24:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=849, Unknown=1, NotChecked=58, Total=992 [2023-11-17 16:24:12,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:24:12,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 534 transitions, 8961 flow. Second operand has 32 states, 32 states have (on average 80.65625) internal successors, (2581), 32 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:12,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:12,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:24:12,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:13,668 INFO L124 PetriNetUnfolderBase]: 1381/2726 cut-off events. [2023-11-17 16:24:13,668 INFO L125 PetriNetUnfolderBase]: For 29019/29019 co-relation queries the response was YES. [2023-11-17 16:24:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21260 conditions, 2726 events. 1381/2726 cut-off events. For 29019/29019 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18708 event pairs, 102 based on Foata normal form. 4/2673 useless extension candidates. Maximal degree in co-relation 21118. Up to 1937 conditions per place. [2023-11-17 16:24:13,714 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 443 selfloop transitions, 156 changer transitions 16/615 dead transitions. [2023-11-17 16:24:13,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 615 transitions, 10975 flow [2023-11-17 16:24:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:24:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:24:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1848 transitions. [2023-11-17 16:24:13,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28378378378378377 [2023-11-17 16:24:13,717 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1848 transitions. [2023-11-17 16:24:13,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1848 transitions. [2023-11-17 16:24:13,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:13,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1848 transitions. [2023-11-17 16:24:13,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:13,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 296.0) internal successors, (6808), 23 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:13,722 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 296.0) internal successors, (6808), 23 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:13,722 INFO L175 Difference]: Start difference. First operand has 272 places, 534 transitions, 8961 flow. Second operand 22 states and 1848 transitions. [2023-11-17 16:24:13,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 615 transitions, 10975 flow [2023-11-17 16:24:13,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 615 transitions, 10607 flow, removed 119 selfloop flow, removed 17 redundant places. [2023-11-17 16:24:13,958 INFO L231 Difference]: Finished difference. Result has 281 places, 552 transitions, 9431 flow [2023-11-17 16:24:13,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=8594, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9431, PETRI_PLACES=281, PETRI_TRANSITIONS=552} [2023-11-17 16:24:13,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-11-17 16:24:13,959 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 552 transitions, 9431 flow [2023-11-17 16:24:13,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 80.65625) internal successors, (2581), 32 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:13,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:13,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:13,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:14,165 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,SelfDestructingSolverStorable17 [2023-11-17 16:24:14,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:14,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash 391948463, now seen corresponding path program 10 times [2023-11-17 16:24:14,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:14,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369936410] [2023-11-17 16:24:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:14,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369936410] [2023-11-17 16:24:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369936410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91420121] [2023-11-17 16:24:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:24:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:14,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:14,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:24:15,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:24:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:15,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:24:15,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:15,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:15,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:15,593 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 55 treesize of output 39 [2023-11-17 16:24:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91420121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:16,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:24:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325041423] [2023-11-17 16:24:16,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:16,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:24:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:24:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:24:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:24:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 552 transitions, 9431 flow. Second operand has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:24:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:19,294 INFO L124 PetriNetUnfolderBase]: 1445/2845 cut-off events. [2023-11-17 16:24:19,294 INFO L125 PetriNetUnfolderBase]: For 34195/34195 co-relation queries the response was YES. [2023-11-17 16:24:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23076 conditions, 2845 events. 1445/2845 cut-off events. For 34195/34195 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 19699 event pairs, 178 based on Foata normal form. 2/2831 useless extension candidates. Maximal degree in co-relation 22638. Up to 2322 conditions per place. [2023-11-17 16:24:19,319 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 499 selfloop transitions, 144 changer transitions 21/664 dead transitions. [2023-11-17 16:24:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 664 transitions, 12075 flow [2023-11-17 16:24:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:24:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:24:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2138 transitions. [2023-11-17 16:24:19,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3009572072072072 [2023-11-17 16:24:19,321 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2138 transitions. [2023-11-17 16:24:19,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2138 transitions. [2023-11-17 16:24:19,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:19,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2138 transitions. [2023-11-17 16:24:19,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.08333333333333) internal successors, (2138), 24 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,327 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,327 INFO L175 Difference]: Start difference. First operand has 281 places, 552 transitions, 9431 flow. Second operand 24 states and 2138 transitions. [2023-11-17 16:24:19,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 664 transitions, 12075 flow [2023-11-17 16:24:19,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 664 transitions, 11771 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-11-17 16:24:19,595 INFO L231 Difference]: Finished difference. Result has 296 places, 592 transitions, 10537 flow [2023-11-17 16:24:19,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=9135, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10537, PETRI_PLACES=296, PETRI_TRANSITIONS=592} [2023-11-17 16:24:19,596 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2023-11-17 16:24:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 592 transitions, 10537 flow [2023-11-17 16:24:19,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.6875) internal successors, (2742), 32 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:19,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:19,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 16:24:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:19,802 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:19,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2014400067, now seen corresponding path program 11 times [2023-11-17 16:24:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:19,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749398062] [2023-11-17 16:24:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:20,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749398062] [2023-11-17 16:24:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749398062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160877029] [2023-11-17 16:24:20,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:24:20,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:20,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:20,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:20,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:24:20,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:24:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:20,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:24:20,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:20,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-17 16:24:20,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:24:20,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:24:20,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:24:20,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-17 16:24:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:21,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:21,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:21,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-17 16:24:21,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2023-11-17 16:24:21,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-11-17 16:24:21,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-11-17 16:24:21,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-11-17 16:24:21,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:21,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-17 16:24:21,752 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:24:21,752 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 300 treesize of output 271 [2023-11-17 16:24:21,759 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:24:21,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-11-17 16:24:21,767 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:24:21,767 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 91 treesize of output 67 [2023-11-17 16:24:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:21,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160877029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:21,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-11-17 16:24:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131898318] [2023-11-17 16:24:21,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:24:21,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:24:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=973, Unknown=5, NotChecked=0, Total=1122 [2023-11-17 16:24:21,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:24:21,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 592 transitions, 10537 flow. Second operand has 34 states, 34 states have (on average 77.58823529411765) internal successors, (2638), 34 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:21,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:21,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:24:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:29,743 INFO L124 PetriNetUnfolderBase]: 1694/3283 cut-off events. [2023-11-17 16:24:29,743 INFO L125 PetriNetUnfolderBase]: For 43760/43760 co-relation queries the response was YES. [2023-11-17 16:24:29,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27418 conditions, 3283 events. 1694/3283 cut-off events. For 43760/43760 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22857 event pairs, 272 based on Foata normal form. 5/3264 useless extension candidates. Maximal degree in co-relation 26992. Up to 2631 conditions per place. [2023-11-17 16:24:29,769 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 595 selfloop transitions, 212 changer transitions 19/826 dead transitions. [2023-11-17 16:24:29,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 826 transitions, 15128 flow [2023-11-17 16:24:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:24:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:24:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3641 transitions. [2023-11-17 16:24:29,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27334834834834837 [2023-11-17 16:24:29,776 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3641 transitions. [2023-11-17 16:24:29,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3641 transitions. [2023-11-17 16:24:29,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:29,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3641 transitions. [2023-11-17 16:24:29,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 80.91111111111111) internal successors, (3641), 45 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:29,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:29,791 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:29,791 INFO L175 Difference]: Start difference. First operand has 296 places, 592 transitions, 10537 flow. Second operand 45 states and 3641 transitions. [2023-11-17 16:24:29,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 826 transitions, 15128 flow [2023-11-17 16:24:30,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 826 transitions, 14866 flow, removed 62 selfloop flow, removed 13 redundant places. [2023-11-17 16:24:30,142 INFO L231 Difference]: Finished difference. Result has 336 places, 713 transitions, 13316 flow [2023-11-17 16:24:30,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=10319, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13316, PETRI_PLACES=336, PETRI_TRANSITIONS=713} [2023-11-17 16:24:30,142 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-11-17 16:24:30,142 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 713 transitions, 13316 flow [2023-11-17 16:24:30,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 77.58823529411765) internal successors, (2638), 34 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:30,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:30,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:30,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:30,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:30,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:30,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 660430615, now seen corresponding path program 12 times [2023-11-17 16:24:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:30,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405254834] [2023-11-17 16:24:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:24:30,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:30,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405254834] [2023-11-17 16:24:30,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405254834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:30,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715314000] [2023-11-17 16:24:30,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:24:30,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:30,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:30,433 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:30,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:24:30,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:24:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:30,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:24:30,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:30,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:30,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715314000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:30,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:30,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-17 16:24:30,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489633187] [2023-11-17 16:24:30,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:30,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:24:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:24:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:24:30,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 296 [2023-11-17 16:24:30,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 713 transitions, 13316 flow. Second operand has 22 states, 22 states have (on average 116.22727272727273) internal successors, (2557), 22 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:30,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:30,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 296 [2023-11-17 16:24:30,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:31,216 INFO L124 PetriNetUnfolderBase]: 342/744 cut-off events. [2023-11-17 16:24:31,216 INFO L125 PetriNetUnfolderBase]: For 15135/15135 co-relation queries the response was YES. [2023-11-17 16:24:31,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6634 conditions, 744 events. 342/744 cut-off events. For 15135/15135 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4013 event pairs, 86 based on Foata normal form. 180/916 useless extension candidates. Maximal degree in co-relation 6523. Up to 469 conditions per place. [2023-11-17 16:24:31,222 INFO L140 encePairwiseOnDemand]: 289/296 looper letters, 110 selfloop transitions, 15 changer transitions 77/202 dead transitions. [2023-11-17 16:24:31,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 202 transitions, 3970 flow [2023-11-17 16:24:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:24:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:24:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1662 transitions. [2023-11-17 16:24:31,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40106177606177607 [2023-11-17 16:24:31,223 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1662 transitions. [2023-11-17 16:24:31,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1662 transitions. [2023-11-17 16:24:31,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:31,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1662 transitions. [2023-11-17 16:24:31,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 118.71428571428571) internal successors, (1662), 14 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 296.0) internal successors, (4440), 15 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,243 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 296.0) internal successors, (4440), 15 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,243 INFO L175 Difference]: Start difference. First operand has 336 places, 713 transitions, 13316 flow. Second operand 14 states and 1662 transitions. [2023-11-17 16:24:31,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 202 transitions, 3970 flow [2023-11-17 16:24:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 202 transitions, 3139 flow, removed 97 selfloop flow, removed 66 redundant places. [2023-11-17 16:24:31,296 INFO L231 Difference]: Finished difference. Result has 217 places, 123 transitions, 1790 flow [2023-11-17 16:24:31,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1790, PETRI_PLACES=217, PETRI_TRANSITIONS=123} [2023-11-17 16:24:31,297 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-11-17 16:24:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 123 transitions, 1790 flow [2023-11-17 16:24:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 116.22727272727273) internal successors, (2557), 22 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:31,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:31,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-17 16:24:31,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:31,502 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1328377053, now seen corresponding path program 13 times [2023-11-17 16:24:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43837000] [2023-11-17 16:24:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:31,552 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 16:24:31,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43837000] [2023-11-17 16:24:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43837000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461174412] [2023-11-17 16:24:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:24:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:31,582 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:31,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:24:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:31,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:24:31,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:31,717 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 16:24:31,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:31,796 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 16:24:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461174412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:31,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:31,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2023-11-17 16:24:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016876389] [2023-11-17 16:24:31,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:24:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:24:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:24:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-17 16:24:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 123 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:31,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-17 16:24:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:31,939 INFO L124 PetriNetUnfolderBase]: 332/655 cut-off events. [2023-11-17 16:24:31,940 INFO L125 PetriNetUnfolderBase]: For 8135/8135 co-relation queries the response was YES. [2023-11-17 16:24:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5030 conditions, 655 events. 332/655 cut-off events. For 8135/8135 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3132 event pairs, 47 based on Foata normal form. 12/621 useless extension candidates. Maximal degree in co-relation 4961. Up to 187 conditions per place. [2023-11-17 16:24:31,944 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 66 selfloop transitions, 55 changer transitions 35/156 dead transitions. [2023-11-17 16:24:31,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 156 transitions, 2461 flow [2023-11-17 16:24:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:24:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:24:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 703 transitions. [2023-11-17 16:24:31,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-17 16:24:31,945 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 703 transitions. [2023-11-17 16:24:31,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 703 transitions. [2023-11-17 16:24:31,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:31,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 703 transitions. [2023-11-17 16:24:31,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 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 16:24:31,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 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 16:24:31,947 INFO L175 Difference]: Start difference. First operand has 217 places, 123 transitions, 1790 flow. Second operand 5 states and 703 transitions. [2023-11-17 16:24:31,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 156 transitions, 2461 flow [2023-11-17 16:24:31,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 156 transitions, 2266 flow, removed 17 selfloop flow, removed 18 redundant places. [2023-11-17 16:24:31,968 INFO L231 Difference]: Finished difference. Result has 140 places, 100 transitions, 1549 flow [2023-11-17 16:24:31,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1549, PETRI_PLACES=140, PETRI_TRANSITIONS=100} [2023-11-17 16:24:31,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2023-11-17 16:24:31,968 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 100 transitions, 1549 flow [2023-11-17 16:24:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:31,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:31,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:24:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:32,173 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1755431132, now seen corresponding path program 14 times [2023-11-17 16:24:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337284396] [2023-11-17 16:24:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:32,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:32,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337284396] [2023-11-17 16:24:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337284396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:32,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128397489] [2023-11-17 16:24:32,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:24:32,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:32,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:32,544 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:32,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:24:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:24:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:32,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:24:32,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:32,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:32,921 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:24:32,921 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 26 treesize of output 14 [2023-11-17 16:24:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:33,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128397489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:33,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:33,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-17 16:24:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781608540] [2023-11-17 16:24:33,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:24:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:24:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:24:33,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 296 [2023-11-17 16:24:33,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 100 transitions, 1549 flow. Second operand has 29 states, 29 states have (on average 105.93103448275862) internal successors, (3072), 29 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:33,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:33,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 296 [2023-11-17 16:24:33,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:34,538 INFO L124 PetriNetUnfolderBase]: 622/1199 cut-off events. [2023-11-17 16:24:34,542 INFO L125 PetriNetUnfolderBase]: For 22211/22211 co-relation queries the response was YES. [2023-11-17 16:24:34,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11061 conditions, 1199 events. 622/1199 cut-off events. For 22211/22211 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6223 event pairs, 139 based on Foata normal form. 42/1082 useless extension candidates. Maximal degree in co-relation 10997. Up to 567 conditions per place. [2023-11-17 16:24:34,550 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 186 selfloop transitions, 98 changer transitions 0/284 dead transitions. [2023-11-17 16:24:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 284 transitions, 5032 flow [2023-11-17 16:24:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:24:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:24:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2765 transitions. [2023-11-17 16:24:34,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37364864864864866 [2023-11-17 16:24:34,553 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2765 transitions. [2023-11-17 16:24:34,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2765 transitions. [2023-11-17 16:24:34,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:34,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2765 transitions. [2023-11-17 16:24:34,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.6) internal successors, (2765), 25 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:34,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 296.0) internal successors, (7696), 26 states have internal predecessors, (7696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:34,577 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 296.0) internal successors, (7696), 26 states have internal predecessors, (7696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:34,577 INFO L175 Difference]: Start difference. First operand has 140 places, 100 transitions, 1549 flow. Second operand 25 states and 2765 transitions. [2023-11-17 16:24:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 284 transitions, 5032 flow [2023-11-17 16:24:34,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 284 transitions, 3273 flow, removed 818 selfloop flow, removed 13 redundant places. [2023-11-17 16:24:34,664 INFO L231 Difference]: Finished difference. Result has 140 places, 200 transitions, 2783 flow [2023-11-17 16:24:34,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2783, PETRI_PLACES=140, PETRI_TRANSITIONS=200} [2023-11-17 16:24:34,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2023-11-17 16:24:34,664 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 200 transitions, 2783 flow [2023-11-17 16:24:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 105.93103448275862) internal successors, (3072), 29 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:34,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:34,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:34,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 16:24:34,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:34,882 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:34,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1096464820, now seen corresponding path program 15 times [2023-11-17 16:24:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476653831] [2023-11-17 16:24:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:34,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:35,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476653831] [2023-11-17 16:24:35,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476653831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872003138] [2023-11-17 16:24:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:24:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:35,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:35,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:24:35,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:24:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:35,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:24:35,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:35,455 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 16:24:35,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:35,498 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:24:35,499 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 26 treesize of output 14 [2023-11-17 16:24:35,508 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 16:24:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872003138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:35,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:35,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-11-17 16:24:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090079812] [2023-11-17 16:24:35,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:24:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:24:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:24:35,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 296 [2023-11-17 16:24:35,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 200 transitions, 2783 flow. Second operand has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:35,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:35,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 296 [2023-11-17 16:24:35,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:36,316 INFO L124 PetriNetUnfolderBase]: 795/1517 cut-off events. [2023-11-17 16:24:36,316 INFO L125 PetriNetUnfolderBase]: For 8697/8697 co-relation queries the response was YES. [2023-11-17 16:24:36,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9083 conditions, 1517 events. 795/1517 cut-off events. For 8697/8697 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8324 event pairs, 112 based on Foata normal form. 66/1441 useless extension candidates. Maximal degree in co-relation 9025. Up to 531 conditions per place. [2023-11-17 16:24:36,325 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 210 selfloop transitions, 168 changer transitions 2/380 dead transitions. [2023-11-17 16:24:36,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 380 transitions, 4919 flow [2023-11-17 16:24:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:24:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:24:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2896 transitions. [2023-11-17 16:24:36,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762993762993763 [2023-11-17 16:24:36,328 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2896 transitions. [2023-11-17 16:24:36,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2896 transitions. [2023-11-17 16:24:36,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:36,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2896 transitions. [2023-11-17 16:24:36,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.38461538461539) internal successors, (2896), 26 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:36,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:36,348 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:36,348 INFO L175 Difference]: Start difference. First operand has 140 places, 200 transitions, 2783 flow. Second operand 26 states and 2896 transitions. [2023-11-17 16:24:36,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 380 transitions, 4919 flow [2023-11-17 16:24:36,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 380 transitions, 4414 flow, removed 248 selfloop flow, removed 4 redundant places. [2023-11-17 16:24:36,389 INFO L231 Difference]: Finished difference. Result has 165 places, 242 transitions, 3380 flow [2023-11-17 16:24:36,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3380, PETRI_PLACES=165, PETRI_TRANSITIONS=242} [2023-11-17 16:24:36,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2023-11-17 16:24:36,389 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 242 transitions, 3380 flow [2023-11-17 16:24:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:36,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:36,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:36,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:36,597 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:36,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1322926084, now seen corresponding path program 16 times [2023-11-17 16:24:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873986116] [2023-11-17 16:24:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:37,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873986116] [2023-11-17 16:24:37,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873986116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967387435] [2023-11-17 16:24:37,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:24:37,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:37,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:37,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:24:37,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:24:37,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:37,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:24:37,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:37,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-17 16:24:37,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:24:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:37,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:37,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:37,539 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 47 treesize of output 40 [2023-11-17 16:24:37,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-17 16:24:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967387435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:37,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-17 16:24:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805297223] [2023-11-17 16:24:37,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:24:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:24:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=865, Unknown=1, NotChecked=0, Total=992 [2023-11-17 16:24:37,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 296 [2023-11-17 16:24:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 242 transitions, 3380 flow. Second operand has 32 states, 32 states have (on average 100.75) internal successors, (3224), 32 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 296 [2023-11-17 16:24:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:38,875 INFO L124 PetriNetUnfolderBase]: 932/1788 cut-off events. [2023-11-17 16:24:38,875 INFO L125 PetriNetUnfolderBase]: For 9943/9943 co-relation queries the response was YES. [2023-11-17 16:24:38,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10243 conditions, 1788 events. 932/1788 cut-off events. For 9943/9943 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10261 event pairs, 136 based on Foata normal form. 60/1730 useless extension candidates. Maximal degree in co-relation 10180. Up to 537 conditions per place. [2023-11-17 16:24:38,884 INFO L140 encePairwiseOnDemand]: 289/296 looper letters, 188 selfloop transitions, 180 changer transitions 1/369 dead transitions. [2023-11-17 16:24:38,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 369 transitions, 5182 flow [2023-11-17 16:24:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:24:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:24:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1899 transitions. [2023-11-17 16:24:38,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3564189189189189 [2023-11-17 16:24:38,888 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1899 transitions. [2023-11-17 16:24:38,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1899 transitions. [2023-11-17 16:24:38,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:38,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1899 transitions. [2023-11-17 16:24:38,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.5) internal successors, (1899), 18 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:38,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:38,892 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:38,892 INFO L175 Difference]: Start difference. First operand has 165 places, 242 transitions, 3380 flow. Second operand 18 states and 1899 transitions. [2023-11-17 16:24:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 369 transitions, 5182 flow [2023-11-17 16:24:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 369 transitions, 4662 flow, removed 190 selfloop flow, removed 7 redundant places. [2023-11-17 16:24:38,927 INFO L231 Difference]: Finished difference. Result has 180 places, 305 transitions, 4249 flow [2023-11-17 16:24:38,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4249, PETRI_PLACES=180, PETRI_TRANSITIONS=305} [2023-11-17 16:24:38,928 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-11-17 16:24:38,928 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 305 transitions, 4249 flow [2023-11-17 16:24:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 100.75) internal successors, (3224), 32 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:38,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:38,929 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:38,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:39,133 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,SelfDestructingSolverStorable24 [2023-11-17 16:24:39,133 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:39,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:39,133 INFO L85 PathProgramCache]: Analyzing trace with hash -591971554, now seen corresponding path program 17 times [2023-11-17 16:24:39,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:39,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071338805] [2023-11-17 16:24:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:39,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071338805] [2023-11-17 16:24:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071338805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499415068] [2023-11-17 16:24:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:24:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:39,559 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:39,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:24:39,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:24:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:39,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:24:39,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:39,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:24:39,806 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 16:24:39,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:39,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:39,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 16:24:39,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:24:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499415068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:40,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:40,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-11-17 16:24:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002452391] [2023-11-17 16:24:40,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:40,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:24:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:24:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:24:40,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 296 [2023-11-17 16:24:40,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 305 transitions, 4249 flow. Second operand has 24 states, 24 states have (on average 100.95833333333333) internal successors, (2423), 24 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:40,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:40,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 296 [2023-11-17 16:24:40,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:42,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:44,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:47,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:48,104 INFO L124 PetriNetUnfolderBase]: 1452/2576 cut-off events. [2023-11-17 16:24:48,105 INFO L125 PetriNetUnfolderBase]: For 12733/12733 co-relation queries the response was YES. [2023-11-17 16:24:48,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 2576 events. 1452/2576 cut-off events. For 12733/12733 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14197 event pairs, 100 based on Foata normal form. 86/2449 useless extension candidates. Maximal degree in co-relation 14661. Up to 972 conditions per place. [2023-11-17 16:24:48,117 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 317 selfloop transitions, 328 changer transitions 5/650 dead transitions. [2023-11-17 16:24:48,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 650 transitions, 8781 flow [2023-11-17 16:24:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:24:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:24:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3670 transitions. [2023-11-17 16:24:48,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35424710424710426 [2023-11-17 16:24:48,121 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3670 transitions. [2023-11-17 16:24:48,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3670 transitions. [2023-11-17 16:24:48,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:48,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3670 transitions. [2023-11-17 16:24:48,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 104.85714285714286) internal successors, (3670), 35 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:48,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:48,128 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:48,128 INFO L175 Difference]: Start difference. First operand has 180 places, 305 transitions, 4249 flow. Second operand 35 states and 3670 transitions. [2023-11-17 16:24:48,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 650 transitions, 8781 flow [2023-11-17 16:24:48,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 650 transitions, 8340 flow, removed 216 selfloop flow, removed 4 redundant places. [2023-11-17 16:24:48,193 INFO L231 Difference]: Finished difference. Result has 226 places, 481 transitions, 7123 flow [2023-11-17 16:24:48,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7123, PETRI_PLACES=226, PETRI_TRANSITIONS=481} [2023-11-17 16:24:48,193 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-17 16:24:48,193 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 481 transitions, 7123 flow [2023-11-17 16:24:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.95833333333333) internal successors, (2423), 24 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:48,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:48,194 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:48,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-17 16:24:48,398 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,SelfDestructingSolverStorable25 [2023-11-17 16:24:48,398 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:48,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1842833953, now seen corresponding path program 18 times [2023-11-17 16:24:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:48,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442612986] [2023-11-17 16:24:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:48,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442612986] [2023-11-17 16:24:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442612986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707933482] [2023-11-17 16:24:49,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:24:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:49,137 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:49,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:24:49,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:24:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:49,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:24:49,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:49,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 16:24:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:49,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:49,466 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_709 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_709) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-11-17 16:24:49,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:49,473 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 47 treesize of output 40 [2023-11-17 16:24:49,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-17 16:24:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:24:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707933482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:49,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:49,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-11-17 16:24:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136691869] [2023-11-17 16:24:49,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:49,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:24:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:49,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:24:49,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2023-11-17 16:24:49,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 296 [2023-11-17 16:24:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 481 transitions, 7123 flow. Second operand has 26 states, 26 states have (on average 101.07692307692308) internal successors, (2628), 26 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:49,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 296 [2023-11-17 16:24:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:50,538 INFO L124 PetriNetUnfolderBase]: 1758/3051 cut-off events. [2023-11-17 16:24:50,539 INFO L125 PetriNetUnfolderBase]: For 19407/19407 co-relation queries the response was YES. [2023-11-17 16:24:50,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19755 conditions, 3051 events. 1758/3051 cut-off events. For 19407/19407 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17135 event pairs, 180 based on Foata normal form. 20/3057 useless extension candidates. Maximal degree in co-relation 19670. Up to 1514 conditions per place. [2023-11-17 16:24:50,562 INFO L140 encePairwiseOnDemand]: 289/296 looper letters, 442 selfloop transitions, 187 changer transitions 1/630 dead transitions. [2023-11-17 16:24:50,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 630 transitions, 10169 flow [2023-11-17 16:24:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:24:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:24:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1771 transitions. [2023-11-17 16:24:50,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519475357710652 [2023-11-17 16:24:50,564 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1771 transitions. [2023-11-17 16:24:50,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1771 transitions. [2023-11-17 16:24:50,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:50,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1771 transitions. [2023-11-17 16:24:50,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 104.17647058823529) internal successors, (1771), 17 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:50,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 296.0) internal successors, (5328), 18 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:50,571 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 296.0) internal successors, (5328), 18 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:50,571 INFO L175 Difference]: Start difference. First operand has 226 places, 481 transitions, 7123 flow. Second operand 17 states and 1771 transitions. [2023-11-17 16:24:50,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 630 transitions, 10169 flow [2023-11-17 16:24:50,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 630 transitions, 9543 flow, removed 268 selfloop flow, removed 8 redundant places. [2023-11-17 16:24:50,696 INFO L231 Difference]: Finished difference. Result has 236 places, 523 transitions, 7910 flow [2023-11-17 16:24:50,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7910, PETRI_PLACES=236, PETRI_TRANSITIONS=523} [2023-11-17 16:24:50,696 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-11-17 16:24:50,697 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 523 transitions, 7910 flow [2023-11-17 16:24:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.07692307692308) internal successors, (2628), 26 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:50,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:50,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:50,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 16:24:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:24:50,902 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:50,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1374334399, now seen corresponding path program 19 times [2023-11-17 16:24:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449030824] [2023-11-17 16:24:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:50,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:51,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449030824] [2023-11-17 16:24:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449030824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10737729] [2023-11-17 16:24:51,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:24:51,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:51,633 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:51,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:24:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:51,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 16:24:51,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:24:52,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:52,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:52,724 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 66 treesize of output 68 [2023-11-17 16:24:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:53,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10737729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:53,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:53,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-11-17 16:24:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156359806] [2023-11-17 16:24:53,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:24:53,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:24:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:24:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:24:53,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 523 transitions, 7910 flow. Second operand has 35 states, 35 states have (on average 85.74285714285715) internal successors, (3001), 35 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:53,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:53,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:24:53,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:54,867 INFO L124 PetriNetUnfolderBase]: 1809/3176 cut-off events. [2023-11-17 16:24:54,867 INFO L125 PetriNetUnfolderBase]: For 20524/20524 co-relation queries the response was YES. [2023-11-17 16:24:54,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20380 conditions, 3176 events. 1809/3176 cut-off events. For 20524/20524 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18370 event pairs, 391 based on Foata normal form. 2/3168 useless extension candidates. Maximal degree in co-relation 20293. Up to 2823 conditions per place. [2023-11-17 16:24:54,889 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 510 selfloop transitions, 91 changer transitions 6/607 dead transitions. [2023-11-17 16:24:54,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 607 transitions, 9694 flow [2023-11-17 16:24:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:24:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:24:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2132 transitions. [2023-11-17 16:24:54,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30011261261261263 [2023-11-17 16:24:54,891 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2132 transitions. [2023-11-17 16:24:54,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2132 transitions. [2023-11-17 16:24:54,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:54,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2132 transitions. [2023-11-17 16:24:54,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.83333333333333) internal successors, (2132), 24 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:54,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:54,896 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:54,896 INFO L175 Difference]: Start difference. First operand has 236 places, 523 transitions, 7910 flow. Second operand 24 states and 2132 transitions. [2023-11-17 16:24:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 607 transitions, 9694 flow [2023-11-17 16:24:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 607 transitions, 9567 flow, removed 35 selfloop flow, removed 8 redundant places. [2023-11-17 16:24:55,022 INFO L231 Difference]: Finished difference. Result has 261 places, 547 transitions, 8418 flow [2023-11-17 16:24:55,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8418, PETRI_PLACES=261, PETRI_TRANSITIONS=547} [2023-11-17 16:24:55,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-11-17 16:24:55,024 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 547 transitions, 8418 flow [2023-11-17 16:24:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.74285714285715) internal successors, (3001), 35 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:55,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:55,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:55,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 16:24:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:55,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:24:55,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1483327431, now seen corresponding path program 20 times [2023-11-17 16:24:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024715447] [2023-11-17 16:24:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024715447] [2023-11-17 16:24:56,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024715447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578063388] [2023-11-17 16:24:56,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:24:56,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:56,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:56,060 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:24:56,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:24:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:56,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 16:24:56,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:56,752 INFO L349 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-17 16:24:56,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-11-17 16:24:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:56,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:57,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:57,390 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 82 treesize of output 93 [2023-11-17 16:24:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578063388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:58,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:58,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:24:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654303368] [2023-11-17 16:24:58,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:24:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:24:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:24:58,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:24:58,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 547 transitions, 8418 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:58,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:58,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:24:58,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:25:07,942 INFO L124 PetriNetUnfolderBase]: 2248/3927 cut-off events. [2023-11-17 16:25:07,942 INFO L125 PetriNetUnfolderBase]: For 28606/28606 co-relation queries the response was YES. [2023-11-17 16:25:07,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25746 conditions, 3927 events. 2248/3927 cut-off events. For 28606/28606 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23773 event pairs, 290 based on Foata normal form. 4/3921 useless extension candidates. Maximal degree in co-relation 25650. Up to 2689 conditions per place. [2023-11-17 16:25:07,976 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 496 selfloop transitions, 291 changer transitions 56/843 dead transitions. [2023-11-17 16:25:07,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 843 transitions, 13194 flow [2023-11-17 16:25:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:25:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:25:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3312 transitions. [2023-11-17 16:25:07,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30241051862673485 [2023-11-17 16:25:07,994 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3312 transitions. [2023-11-17 16:25:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3312 transitions. [2023-11-17 16:25:07,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:25:07,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3312 transitions. [2023-11-17 16:25:07,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 89.51351351351352) internal successors, (3312), 37 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:08,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:08,002 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:08,003 INFO L175 Difference]: Start difference. First operand has 261 places, 547 transitions, 8418 flow. Second operand 37 states and 3312 transitions. [2023-11-17 16:25:08,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 843 transitions, 13194 flow [2023-11-17 16:25:08,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 843 transitions, 13020 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-11-17 16:25:08,265 INFO L231 Difference]: Finished difference. Result has 305 places, 717 transitions, 11895 flow [2023-11-17 16:25:08,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11895, PETRI_PLACES=305, PETRI_TRANSITIONS=717} [2023-11-17 16:25:08,266 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-11-17 16:25:08,267 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 717 transitions, 11895 flow [2023-11-17 16:25:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:08,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:25:08,267 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:25:08,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:25:08,468 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,SelfDestructingSolverStorable28 [2023-11-17 16:25:08,468 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:25:08,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:25:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -805123719, now seen corresponding path program 21 times [2023-11-17 16:25:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:25:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614320468] [2023-11-17 16:25:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:25:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:25:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:09,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614320468] [2023-11-17 16:25:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614320468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724691090] [2023-11-17 16:25:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:25:09,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:09,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:09,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:09,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:25:09,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:25:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:09,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:25:09,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:10,061 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-11-17 16:25:10,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2023-11-17 16:25:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:10,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:10,896 INFO L349 Elim1Store]: treesize reduction 10, result has 77.8 percent of original size [2023-11-17 16:25:10,897 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 82 treesize of output 83 [2023-11-17 16:25:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724691090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:11,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:25:11,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293242070] [2023-11-17 16:25:11,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:25:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:25:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:25:11,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:25:11,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 717 transitions, 11895 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:11,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:11,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:25:11,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:25:20,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:22,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:23,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:25,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:36,721 WARN L293 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:25:38,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:40,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:46,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:48,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:51,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:54,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:54,932 INFO L124 PetriNetUnfolderBase]: 2535/4430 cut-off events. [2023-11-17 16:25:54,932 INFO L125 PetriNetUnfolderBase]: For 35913/35913 co-relation queries the response was YES. [2023-11-17 16:25:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31630 conditions, 4430 events. 2535/4430 cut-off events. For 35913/35913 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27431 event pairs, 404 based on Foata normal form. 6/4426 useless extension candidates. Maximal degree in co-relation 31518. Up to 3639 conditions per place. [2023-11-17 16:25:54,980 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 680 selfloop transitions, 285 changer transitions 41/1006 dead transitions. [2023-11-17 16:25:54,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1006 transitions, 17326 flow [2023-11-17 16:25:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:25:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:25:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4185 transitions. [2023-11-17 16:25:54,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30081943645773435 [2023-11-17 16:25:54,991 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4185 transitions. [2023-11-17 16:25:54,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4185 transitions. [2023-11-17 16:25:54,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:25:54,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4185 transitions. [2023-11-17 16:25:55,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 89.04255319148936) internal successors, (4185), 47 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:55,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 296.0) internal successors, (14208), 48 states have internal predecessors, (14208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:55,019 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 296.0) internal successors, (14208), 48 states have internal predecessors, (14208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:55,019 INFO L175 Difference]: Start difference. First operand has 305 places, 717 transitions, 11895 flow. Second operand 47 states and 4185 transitions. [2023-11-17 16:25:55,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1006 transitions, 17326 flow [2023-11-17 16:25:55,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1006 transitions, 16697 flow, removed 286 selfloop flow, removed 14 redundant places. [2023-11-17 16:25:55,557 INFO L231 Difference]: Finished difference. Result has 351 places, 876 transitions, 15203 flow [2023-11-17 16:25:55,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=11496, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15203, PETRI_PLACES=351, PETRI_TRANSITIONS=876} [2023-11-17 16:25:55,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 330 predicate places. [2023-11-17 16:25:55,573 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 876 transitions, 15203 flow [2023-11-17 16:25:55,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:55,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:25:55,574 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:25:55,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:25:55,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:55,778 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:25:55,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:25:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1992254703, now seen corresponding path program 22 times [2023-11-17 16:25:55,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:25:55,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360117117] [2023-11-17 16:25:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:25:55,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:25:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:56,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360117117] [2023-11-17 16:25:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360117117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956213384] [2023-11-17 16:25:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:25:56,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:56,550 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:56,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:25:56,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:25:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:56,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-17 16:25:56,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:57,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:57,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:57,833 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 66 treesize of output 68 [2023-11-17 16:25:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956213384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:58,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:58,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:25:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296130425] [2023-11-17 16:25:58,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:58,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:25:58,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:25:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:25:58,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:25:58,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 876 transitions, 15203 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:58,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:58,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:25:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:15,950 INFO L124 PetriNetUnfolderBase]: 2576/4540 cut-off events. [2023-11-17 16:26:15,950 INFO L125 PetriNetUnfolderBase]: For 39573/39573 co-relation queries the response was YES. [2023-11-17 16:26:15,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33575 conditions, 4540 events. 2576/4540 cut-off events. For 39573/39573 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28563 event pairs, 435 based on Foata normal form. 5/4527 useless extension candidates. Maximal degree in co-relation 33442. Up to 3688 conditions per place. [2023-11-17 16:26:15,991 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 696 selfloop transitions, 261 changer transitions 31/988 dead transitions. [2023-11-17 16:26:15,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 988 transitions, 18012 flow [2023-11-17 16:26:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:26:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:26:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2945 transitions. [2023-11-17 16:26:15,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3014946764946765 [2023-11-17 16:26:15,994 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2945 transitions. [2023-11-17 16:26:15,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2945 transitions. [2023-11-17 16:26:15,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:15,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2945 transitions. [2023-11-17 16:26:15,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 89.24242424242425) internal successors, (2945), 33 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:16,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 296.0) internal successors, (10064), 34 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:16,001 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 296.0) internal successors, (10064), 34 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:16,001 INFO L175 Difference]: Start difference. First operand has 351 places, 876 transitions, 15203 flow. Second operand 33 states and 2945 transitions. [2023-11-17 16:26:16,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 988 transitions, 18012 flow [2023-11-17 16:26:16,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 988 transitions, 17514 flow, removed 204 selfloop flow, removed 22 redundant places. [2023-11-17 16:26:16,452 INFO L231 Difference]: Finished difference. Result has 363 places, 888 transitions, 15767 flow [2023-11-17 16:26:16,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=14773, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=15767, PETRI_PLACES=363, PETRI_TRANSITIONS=888} [2023-11-17 16:26:16,453 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-11-17 16:26:16,453 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 888 transitions, 15767 flow [2023-11-17 16:26:16,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:16,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:16,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:16,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 16:26:16,661 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:16,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1190195803, now seen corresponding path program 23 times [2023-11-17 16:26:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090398144] [2023-11-17 16:26:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090398144] [2023-11-17 16:26:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090398144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587815427] [2023-11-17 16:26:17,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:26:17,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:17,500 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:17,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:26:17,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:26:17,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:17,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-17 16:26:17,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:26:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:26:18,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:26:18,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:18,288 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 38 treesize of output 18 [2023-11-17 16:26:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:18,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:18,813 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:26:18,813 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 76 treesize of output 71 [2023-11-17 16:26:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587815427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:19,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:19,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:26:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568588240] [2023-11-17 16:26:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:26:19,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:26:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:26:19,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:26:19,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 888 transitions, 15767 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:19,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:19,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:26:19,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:22,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:26:27,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:26:27,275 INFO L124 PetriNetUnfolderBase]: 2733/4830 cut-off events. [2023-11-17 16:26:27,275 INFO L125 PetriNetUnfolderBase]: For 40371/40371 co-relation queries the response was YES. [2023-11-17 16:26:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35640 conditions, 4830 events. 2733/4830 cut-off events. For 40371/40371 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30628 event pairs, 401 based on Foata normal form. 3/4815 useless extension candidates. Maximal degree in co-relation 35506. Up to 1574 conditions per place. [2023-11-17 16:26:27,319 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 377 selfloop transitions, 633 changer transitions 32/1042 dead transitions. [2023-11-17 16:26:27,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1042 transitions, 19608 flow [2023-11-17 16:26:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:26:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:26:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2058 transitions. [2023-11-17 16:26:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30229142185663926 [2023-11-17 16:26:27,322 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2058 transitions. [2023-11-17 16:26:27,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2058 transitions. [2023-11-17 16:26:27,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:27,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2058 transitions. [2023-11-17 16:26:27,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.47826086956522) internal successors, (2058), 23 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:27,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:27,387 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:27,387 INFO L175 Difference]: Start difference. First operand has 363 places, 888 transitions, 15767 flow. Second operand 23 states and 2058 transitions. [2023-11-17 16:26:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1042 transitions, 19608 flow [2023-11-17 16:26:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1042 transitions, 19317 flow, removed 37 selfloop flow, removed 18 redundant places. [2023-11-17 16:26:27,889 INFO L231 Difference]: Finished difference. Result has 376 places, 967 transitions, 19331 flow [2023-11-17 16:26:27,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=15511, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19331, PETRI_PLACES=376, PETRI_TRANSITIONS=967} [2023-11-17 16:26:27,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 355 predicate places. [2023-11-17 16:26:27,891 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 967 transitions, 19331 flow [2023-11-17 16:26:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:27,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:27,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:27,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:28,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:28,098 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:28,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1868399515, now seen corresponding path program 24 times [2023-11-17 16:26:28,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:28,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068155255] [2023-11-17 16:26:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:28,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:28,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:28,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068155255] [2023-11-17 16:26:28,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068155255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:28,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590370281] [2023-11-17 16:26:28,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:26:28,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:28,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:28,939 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:26:29,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:26:29,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:29,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 16:26:29,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:26:29,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:29,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:29,974 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 66 treesize of output 68 [2023-11-17 16:26:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:26:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590370281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:30,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:30,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-11-17 16:26:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642200679] [2023-11-17 16:26:30,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:30,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:26:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:26:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:26:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:26:30,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 967 transitions, 19331 flow. Second operand has 35 states, 35 states have (on average 85.74285714285715) internal successors, (3001), 35 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:30,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:26:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:32,975 INFO L124 PetriNetUnfolderBase]: 2709/4780 cut-off events. [2023-11-17 16:26:32,975 INFO L125 PetriNetUnfolderBase]: For 49520/49520 co-relation queries the response was YES. [2023-11-17 16:26:33,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38824 conditions, 4780 events. 2709/4780 cut-off events. For 49520/49520 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30292 event pairs, 628 based on Foata normal form. 2/4774 useless extension candidates. Maximal degree in co-relation 38681. Up to 4543 conditions per place. [2023-11-17 16:26:33,018 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 919 selfloop transitions, 85 changer transitions 14/1018 dead transitions. [2023-11-17 16:26:33,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1018 transitions, 21747 flow [2023-11-17 16:26:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:26:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:26:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2113 transitions. [2023-11-17 16:26:33,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974380630630631 [2023-11-17 16:26:33,021 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2113 transitions. [2023-11-17 16:26:33,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2113 transitions. [2023-11-17 16:26:33,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:33,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2113 transitions. [2023-11-17 16:26:33,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.04166666666667) internal successors, (2113), 24 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:33,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:33,025 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 296.0) internal successors, (7400), 25 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:33,026 INFO L175 Difference]: Start difference. First operand has 376 places, 967 transitions, 19331 flow. Second operand 24 states and 2113 transitions. [2023-11-17 16:26:33,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1018 transitions, 21747 flow [2023-11-17 16:26:33,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1018 transitions, 21523 flow, removed 96 selfloop flow, removed 12 redundant places. [2023-11-17 16:26:33,672 INFO L231 Difference]: Finished difference. Result has 389 places, 977 transitions, 19536 flow [2023-11-17 16:26:33,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=19107, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19536, PETRI_PLACES=389, PETRI_TRANSITIONS=977} [2023-11-17 16:26:33,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 368 predicate places. [2023-11-17 16:26:33,673 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 977 transitions, 19536 flow [2023-11-17 16:26:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.74285714285715) internal successors, (3001), 35 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:33,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:33,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:33,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 16:26:33,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:33,878 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:33,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:33,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1296944709, now seen corresponding path program 25 times [2023-11-17 16:26:33,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:33,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029918365] [2023-11-17 16:26:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029918365] [2023-11-17 16:26:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029918365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489673231] [2023-11-17 16:26:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:26:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:34,624 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:34,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:26:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:34,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:26:34,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:35,201 INFO L349 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-11-17 16:26:35,201 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 45 treesize of output 38 [2023-11-17 16:26:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:35,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:35,805 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-17 16:26:35,806 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 65 treesize of output 60 [2023-11-17 16:26:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489673231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:36,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:26:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709784700] [2023-11-17 16:26:36,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:26:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:26:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:26:36,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:26:36,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 977 transitions, 19536 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:36,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:36,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:26:36,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:44,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:26:48,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:26:50,250 INFO L124 PetriNetUnfolderBase]: 3015/5353 cut-off events. [2023-11-17 16:26:50,250 INFO L125 PetriNetUnfolderBase]: For 54791/54791 co-relation queries the response was YES. [2023-11-17 16:26:50,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43716 conditions, 5353 events. 3015/5353 cut-off events. For 54791/54791 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35024 event pairs, 595 based on Foata normal form. 11/5356 useless extension candidates. Maximal degree in co-relation 43570. Up to 2671 conditions per place. [2023-11-17 16:26:50,304 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 608 selfloop transitions, 601 changer transitions 40/1249 dead transitions. [2023-11-17 16:26:50,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1249 transitions, 26077 flow [2023-11-17 16:26:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:26:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:26:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3292 transitions. [2023-11-17 16:26:50,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30058436815193573 [2023-11-17 16:26:50,307 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3292 transitions. [2023-11-17 16:26:50,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3292 transitions. [2023-11-17 16:26:50,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:50,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3292 transitions. [2023-11-17 16:26:50,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 88.97297297297297) internal successors, (3292), 37 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:50,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:50,314 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 296.0) internal successors, (11248), 38 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:50,314 INFO L175 Difference]: Start difference. First operand has 389 places, 977 transitions, 19536 flow. Second operand 37 states and 3292 transitions. [2023-11-17 16:26:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1249 transitions, 26077 flow [2023-11-17 16:26:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1249 transitions, 25780 flow, removed 44 selfloop flow, removed 21 redundant places. [2023-11-17 16:26:51,130 INFO L231 Difference]: Finished difference. Result has 425 places, 1147 transitions, 24848 flow [2023-11-17 16:26:51,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=19251, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24848, PETRI_PLACES=425, PETRI_TRANSITIONS=1147} [2023-11-17 16:26:51,131 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 404 predicate places. [2023-11-17 16:26:51,131 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1147 transitions, 24848 flow [2023-11-17 16:26:51,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:51,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:51,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:51,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:51,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:51,337 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:51,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -200644165, now seen corresponding path program 26 times [2023-11-17 16:26:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:51,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704813914] [2023-11-17 16:26:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:51,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:52,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704813914] [2023-11-17 16:26:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704813914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:52,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360627320] [2023-11-17 16:26:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:26:52,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:52,122 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:52,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:26:52,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:52,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:52,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:26:52,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:52,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:52,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-11-17 16:26:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:52,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:53,378 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:26:53,378 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 66 treesize of output 58 [2023-11-17 16:26:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:54,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360627320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:54,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:26:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131398380] [2023-11-17 16:26:54,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:26:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:26:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:26:54,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:26:54,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1147 transitions, 24848 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:54,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:54,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:26:54,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:58,967 INFO L124 PetriNetUnfolderBase]: 3036/5368 cut-off events. [2023-11-17 16:26:58,967 INFO L125 PetriNetUnfolderBase]: For 61525/61525 co-relation queries the response was YES. [2023-11-17 16:26:59,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46987 conditions, 5368 events. 3036/5368 cut-off events. For 61525/61525 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35290 event pairs, 598 based on Foata normal form. 9/5369 useless extension candidates. Maximal degree in co-relation 46822. Up to 4957 conditions per place. [2023-11-17 16:26:59,025 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1071 selfloop transitions, 130 changer transitions 38/1239 dead transitions. [2023-11-17 16:26:59,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1239 transitions, 28132 flow [2023-11-17 16:26:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:26:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:26:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3519 transitions. [2023-11-17 16:26:59,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29721283783783786 [2023-11-17 16:26:59,028 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3519 transitions. [2023-11-17 16:26:59,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3519 transitions. [2023-11-17 16:26:59,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:59,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3519 transitions. [2023-11-17 16:26:59,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 87.975) internal successors, (3519), 40 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 296.0) internal successors, (12136), 41 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,035 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 296.0) internal successors, (12136), 41 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,035 INFO L175 Difference]: Start difference. First operand has 425 places, 1147 transitions, 24848 flow. Second operand 40 states and 3519 transitions. [2023-11-17 16:26:59,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1239 transitions, 28132 flow [2023-11-17 16:27:00,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1239 transitions, 27183 flow, removed 173 selfloop flow, removed 17 redundant places. [2023-11-17 16:27:00,043 INFO L231 Difference]: Finished difference. Result has 446 places, 1150 transitions, 24470 flow [2023-11-17 16:27:00,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=23903, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1016, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=24470, PETRI_PLACES=446, PETRI_TRANSITIONS=1150} [2023-11-17 16:27:00,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-11-17 16:27:00,044 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1150 transitions, 24470 flow [2023-11-17 16:27:00,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:00,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:00,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:00,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-17 16:27:00,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:00,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash 370810641, now seen corresponding path program 27 times [2023-11-17 16:27:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702022749] [2023-11-17 16:27:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702022749] [2023-11-17 16:27:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702022749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383747288] [2023-11-17 16:27:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:00,985 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:00,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:27:01,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:27:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:01,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 16:27:01,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:01,527 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-11-17 16:27:01,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2023-11-17 16:27:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:27:01,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:02,190 INFO L349 Elim1Store]: treesize reduction 16, result has 80.2 percent of original size [2023-11-17 16:27:02,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 130 [2023-11-17 16:27:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:27:02,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383747288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:02,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:02,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-11-17 16:27:02,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949857861] [2023-11-17 16:27:02,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:02,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:27:02,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:27:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:27:02,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:27:02,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1150 transitions, 24470 flow. Second operand has 33 states, 33 states have (on average 85.78787878787878) internal successors, (2831), 33 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:02,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:02,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:27:02,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:06,527 INFO L124 PetriNetUnfolderBase]: 3041/5370 cut-off events. [2023-11-17 16:27:06,527 INFO L125 PetriNetUnfolderBase]: For 53839/53839 co-relation queries the response was YES. [2023-11-17 16:27:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46075 conditions, 5370 events. 3041/5370 cut-off events. For 53839/53839 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35216 event pairs, 582 based on Foata normal form. 2/5364 useless extension candidates. Maximal degree in co-relation 45912. Up to 5015 conditions per place. [2023-11-17 16:27:06,596 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1087 selfloop transitions, 124 changer transitions 24/1235 dead transitions. [2023-11-17 16:27:06,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1235 transitions, 27711 flow [2023-11-17 16:27:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:27:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:27:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2557 transitions. [2023-11-17 16:27:06,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2978797763280522 [2023-11-17 16:27:06,600 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2557 transitions. [2023-11-17 16:27:06,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2557 transitions. [2023-11-17 16:27:06,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:06,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2557 transitions. [2023-11-17 16:27:06,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 88.17241379310344) internal successors, (2557), 29 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,650 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,650 INFO L175 Difference]: Start difference. First operand has 446 places, 1150 transitions, 24470 flow. Second operand 29 states and 2557 transitions. [2023-11-17 16:27:06,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1235 transitions, 27711 flow [2023-11-17 16:27:07,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1235 transitions, 27436 flow, removed 55 selfloop flow, removed 24 redundant places. [2023-11-17 16:27:07,583 INFO L231 Difference]: Finished difference. Result has 449 places, 1172 transitions, 25053 flow [2023-11-17 16:27:07,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=24207, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=25053, PETRI_PLACES=449, PETRI_TRANSITIONS=1172} [2023-11-17 16:27:07,584 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 428 predicate places. [2023-11-17 16:27:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1172 transitions, 25053 flow [2023-11-17 16:27:07,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.78787878787878) internal successors, (2831), 33 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:07,585 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:07,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:07,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 16:27:07,790 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:07,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash -139886433, now seen corresponding path program 28 times [2023-11-17 16:27:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:07,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110323509] [2023-11-17 16:27:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:08,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:08,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110323509] [2023-11-17 16:27:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110323509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:08,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173584126] [2023-11-17 16:27:08,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:08,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:08,560 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:08,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:27:08,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:08,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:27:08,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:09,233 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-17 16:27:09,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-11-17 16:27:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:09,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:09,628 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:27:09,629 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 66 treesize of output 69 [2023-11-17 16:27:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:10,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173584126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:10,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:10,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:27:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892994811] [2023-11-17 16:27:10,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:10,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:27:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:27:10,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:27:10,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:27:10,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1172 transitions, 25053 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:10,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:10,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:27:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:15,326 INFO L124 PetriNetUnfolderBase]: 3132/5561 cut-off events. [2023-11-17 16:27:15,326 INFO L125 PetriNetUnfolderBase]: For 57394/57394 co-relation queries the response was YES. [2023-11-17 16:27:15,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47712 conditions, 5561 events. 3132/5561 cut-off events. For 57394/57394 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36604 event pairs, 615 based on Foata normal form. 3/5556 useless extension candidates. Maximal degree in co-relation 47546. Up to 2686 conditions per place. [2023-11-17 16:27:15,391 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 640 selfloop transitions, 601 changer transitions 31/1272 dead transitions. [2023-11-17 16:27:15,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1272 transitions, 28815 flow [2023-11-17 16:27:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:27:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:27:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1962 transitions. [2023-11-17 16:27:15,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3012899262899263 [2023-11-17 16:27:15,393 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1962 transitions. [2023-11-17 16:27:15,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1962 transitions. [2023-11-17 16:27:15,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:15,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1962 transitions. [2023-11-17 16:27:15,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.18181818181819) internal successors, (1962), 22 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 296.0) internal successors, (6808), 23 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,397 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 296.0) internal successors, (6808), 23 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,397 INFO L175 Difference]: Start difference. First operand has 449 places, 1172 transitions, 25053 flow. Second operand 22 states and 1962 transitions. [2023-11-17 16:27:15,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1272 transitions, 28815 flow [2023-11-17 16:27:16,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1272 transitions, 28538 flow, removed 71 selfloop flow, removed 22 redundant places. [2023-11-17 16:27:16,560 INFO L231 Difference]: Finished difference. Result has 452 places, 1206 transitions, 27334 flow [2023-11-17 16:27:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=24790, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=27334, PETRI_PLACES=452, PETRI_TRANSITIONS=1206} [2023-11-17 16:27:16,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-11-17 16:27:16,561 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 1206 transitions, 27334 flow [2023-11-17 16:27:16,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:16,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:16,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 16:27:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:16,766 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:16,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1723180957, now seen corresponding path program 29 times [2023-11-17 16:27:16,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:16,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783393093] [2023-11-17 16:27:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:17,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783393093] [2023-11-17 16:27:17,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783393093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:17,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799679279] [2023-11-17 16:27:17,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:17,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:17,344 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:17,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:27:17,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:27:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:17,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-17 16:27:17,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:17,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:17,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 7 [2023-11-17 16:27:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:17,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:18,342 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:27:18,342 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 67 treesize of output 59 [2023-11-17 16:27:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799679279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:18,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:18,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:27:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463018827] [2023-11-17 16:27:18,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:18,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:27:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:27:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:27:18,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:27:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1206 transitions, 27334 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:18,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:27:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:31,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:27:34,385 INFO L124 PetriNetUnfolderBase]: 3293/5853 cut-off events. [2023-11-17 16:27:34,385 INFO L125 PetriNetUnfolderBase]: For 64633/64633 co-relation queries the response was YES. [2023-11-17 16:27:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53060 conditions, 5853 events. 3293/5853 cut-off events. For 64633/64633 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39064 event pairs, 629 based on Foata normal form. 6/5851 useless extension candidates. Maximal degree in co-relation 52889. Up to 5337 conditions per place. [2023-11-17 16:27:34,451 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1143 selfloop transitions, 208 changer transitions 36/1387 dead transitions. [2023-11-17 16:27:34,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1387 transitions, 33076 flow [2023-11-17 16:27:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 16:27:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 16:27:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3438 transitions. [2023-11-17 16:27:34,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2978170478170478 [2023-11-17 16:27:34,454 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3438 transitions. [2023-11-17 16:27:34,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3438 transitions. [2023-11-17 16:27:34,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:34,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3438 transitions. [2023-11-17 16:27:34,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.15384615384616) internal successors, (3438), 39 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 296.0) internal successors, (11840), 40 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,461 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 296.0) internal successors, (11840), 40 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,461 INFO L175 Difference]: Start difference. First operand has 452 places, 1206 transitions, 27334 flow. Second operand 39 states and 3438 transitions. [2023-11-17 16:27:34,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1387 transitions, 33076 flow [2023-11-17 16:27:35,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1387 transitions, 32969 flow, removed 40 selfloop flow, removed 15 redundant places. [2023-11-17 16:27:35,653 INFO L231 Difference]: Finished difference. Result has 489 places, 1301 transitions, 30459 flow [2023-11-17 16:27:35,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=27237, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=30459, PETRI_PLACES=489, PETRI_TRANSITIONS=1301} [2023-11-17 16:27:35,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2023-11-17 16:27:35,654 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1301 transitions, 30459 flow [2023-11-17 16:27:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:35,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:35,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:35,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:27:35,860 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:35,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1151726151, now seen corresponding path program 30 times [2023-11-17 16:27:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978985194] [2023-11-17 16:27:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:36,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978985194] [2023-11-17 16:27:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978985194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605829144] [2023-11-17 16:27:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:36,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:36,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:36,675 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:27:36,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:27:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:36,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-17 16:27:36,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:27:37,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:37,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 34 treesize of output 22 [2023-11-17 16:27:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:37,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:37,871 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:27:37,871 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 66 treesize of output 69 [2023-11-17 16:27:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605829144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:38,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:38,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:27:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303516730] [2023-11-17 16:27:38,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:38,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:27:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:27:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:27:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:27:38,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1301 transitions, 30459 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:38,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:38,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:27:38,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:48,357 INFO L124 PetriNetUnfolderBase]: 3521/6258 cut-off events. [2023-11-17 16:27:48,358 INFO L125 PetriNetUnfolderBase]: For 73394/73394 co-relation queries the response was YES. [2023-11-17 16:27:48,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57360 conditions, 6258 events. 3521/6258 cut-off events. For 73394/73394 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42507 event pairs, 562 based on Foata normal form. 11/6257 useless extension candidates. Maximal degree in co-relation 57176. Up to 3166 conditions per place. [2023-11-17 16:27:48,442 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 706 selfloop transitions, 769 changer transitions 31/1506 dead transitions. [2023-11-17 16:27:48,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1506 transitions, 36200 flow [2023-11-17 16:27:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 16:27:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 16:27:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3467 transitions. [2023-11-17 16:27:48,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3003291753291753 [2023-11-17 16:27:48,446 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3467 transitions. [2023-11-17 16:27:48,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3467 transitions. [2023-11-17 16:27:48,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:48,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3467 transitions. [2023-11-17 16:27:48,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.8974358974359) internal successors, (3467), 39 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:48,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 296.0) internal successors, (11840), 40 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:48,454 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 296.0) internal successors, (11840), 40 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:48,454 INFO L175 Difference]: Start difference. First operand has 489 places, 1301 transitions, 30459 flow. Second operand 39 states and 3467 transitions. [2023-11-17 16:27:48,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1506 transitions, 36200 flow [2023-11-17 16:27:50,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1506 transitions, 35842 flow, removed 149 selfloop flow, removed 20 redundant places. [2023-11-17 16:27:50,058 INFO L231 Difference]: Finished difference. Result has 518 places, 1405 transitions, 34494 flow [2023-11-17 16:27:50,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=30079, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=34494, PETRI_PLACES=518, PETRI_TRANSITIONS=1405} [2023-11-17 16:27:50,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 497 predicate places. [2023-11-17 16:27:50,060 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1405 transitions, 34494 flow [2023-11-17 16:27:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:50,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:50,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:50,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:50,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:27:50,266 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:50,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:50,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1645652271, now seen corresponding path program 31 times [2023-11-17 16:27:50,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:50,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841022465] [2023-11-17 16:27:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:50,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841022465] [2023-11-17 16:27:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841022465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986998272] [2023-11-17 16:27:51,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:51,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:51,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:51,219 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:51,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:27:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:51,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:27:51,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:51,980 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-17 16:27:51,980 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 45 treesize of output 18 [2023-11-17 16:27:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:52,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:52,440 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:27:52,441 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 66 treesize of output 69 [2023-11-17 16:27:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986998272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:53,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:53,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-11-17 16:27:53,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461474129] [2023-11-17 16:27:53,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:27:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:27:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:27:53,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:27:53,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1405 transitions, 34494 flow. Second operand has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:53,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:53,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:27:53,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:00,594 INFO L124 PetriNetUnfolderBase]: 3541/6294 cut-off events. [2023-11-17 16:28:00,594 INFO L125 PetriNetUnfolderBase]: For 80213/80213 co-relation queries the response was YES. [2023-11-17 16:28:00,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60377 conditions, 6294 events. 3541/6294 cut-off events. For 80213/80213 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42616 event pairs, 706 based on Foata normal form. 9/6295 useless extension candidates. Maximal degree in co-relation 60182. Up to 3248 conditions per place. [2023-11-17 16:28:00,674 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 714 selfloop transitions, 714 changer transitions 39/1467 dead transitions. [2023-11-17 16:28:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1467 transitions, 37903 flow [2023-11-17 16:28:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:28:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:28:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1858 transitions. [2023-11-17 16:28:00,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2729142185663925 [2023-11-17 16:28:00,684 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1858 transitions. [2023-11-17 16:28:00,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1858 transitions. [2023-11-17 16:28:00,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:00,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1858 transitions. [2023-11-17 16:28:00,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 80.78260869565217) internal successors, (1858), 23 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:00,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:00,688 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:00,689 INFO L175 Difference]: Start difference. First operand has 518 places, 1405 transitions, 34494 flow. Second operand 23 states and 1858 transitions. [2023-11-17 16:28:00,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1467 transitions, 37903 flow [2023-11-17 16:28:02,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1467 transitions, 37579 flow, removed 130 selfloop flow, removed 21 redundant places. [2023-11-17 16:28:02,513 INFO L231 Difference]: Finished difference. Result has 518 places, 1396 transitions, 35483 flow [2023-11-17 16:28:02,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=34186, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35483, PETRI_PLACES=518, PETRI_TRANSITIONS=1396} [2023-11-17 16:28:02,514 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 497 predicate places. [2023-11-17 16:28:02,514 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1396 transitions, 35483 flow [2023-11-17 16:28:02,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:02,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:02,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:02,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:02,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:28:02,720 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:28:02,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -229065645, now seen corresponding path program 32 times [2023-11-17 16:28:02,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:02,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473941138] [2023-11-17 16:28:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473941138] [2023-11-17 16:28:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473941138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:03,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718720039] [2023-11-17 16:28:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:28:03,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:03,599 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:28:03,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:28:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:03,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 16:28:03,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:04,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-17 16:28:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:28:04,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:04,500 WARN L854 $PredicateComparison]: unable to prove that (and (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296)) (forall ((v_ArrVal_1158 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1158) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) c_~N~0))) is different from false [2023-11-17 16:28:04,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:04,628 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 96 treesize of output 98 [2023-11-17 16:28:04,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:04,634 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 53 treesize of output 40 [2023-11-17 16:28:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:28:05,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718720039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:05,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:05,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-11-17 16:28:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143587964] [2023-11-17 16:28:05,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:05,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 16:28:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:05,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 16:28:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1378, Unknown=1, NotChecked=74, Total=1560 [2023-11-17 16:28:05,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:28:05,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1396 transitions, 35483 flow. Second operand has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:05,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:05,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:28:05,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:09,212 INFO L124 PetriNetUnfolderBase]: 3559/6332 cut-off events. [2023-11-17 16:28:09,213 INFO L125 PetriNetUnfolderBase]: For 80546/80546 co-relation queries the response was YES. [2023-11-17 16:28:09,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61980 conditions, 6332 events. 3559/6332 cut-off events. For 80546/80546 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43251 event pairs, 456 based on Foata normal form. 3/6327 useless extension candidates. Maximal degree in co-relation 61788. Up to 5665 conditions per place. [2023-11-17 16:28:09,288 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 1308 selfloop transitions, 145 changer transitions 27/1480 dead transitions. [2023-11-17 16:28:09,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1480 transitions, 39127 flow [2023-11-17 16:28:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:28:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:28:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2017 transitions. [2023-11-17 16:28:09,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27256756756756756 [2023-11-17 16:28:09,290 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2017 transitions. [2023-11-17 16:28:09,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2017 transitions. [2023-11-17 16:28:09,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:09,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2017 transitions. [2023-11-17 16:28:09,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 80.68) internal successors, (2017), 25 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:09,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 296.0) internal successors, (7696), 26 states have internal predecessors, (7696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:09,295 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 296.0) internal successors, (7696), 26 states have internal predecessors, (7696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:09,295 INFO L175 Difference]: Start difference. First operand has 518 places, 1396 transitions, 35483 flow. Second operand 25 states and 2017 transitions. [2023-11-17 16:28:09,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1480 transitions, 39127 flow [2023-11-17 16:28:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1480 transitions, 38563 flow, removed 34 selfloop flow, removed 16 redundant places. [2023-11-17 16:28:11,066 INFO L231 Difference]: Finished difference. Result has 531 places, 1413 transitions, 35638 flow [2023-11-17 16:28:11,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=34919, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=35638, PETRI_PLACES=531, PETRI_TRANSITIONS=1413} [2023-11-17 16:28:11,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 510 predicate places. [2023-11-17 16:28:11,067 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1413 transitions, 35638 flow [2023-11-17 16:28:11,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:11,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:11,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:11,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:11,272 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:28:11,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash -787073825, now seen corresponding path program 33 times [2023-11-17 16:28:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667494862] [2023-11-17 16:28:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:12,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667494862] [2023-11-17 16:28:12,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667494862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:12,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366920790] [2023-11-17 16:28:12,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:28:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:12,327 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:12,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:28:12,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:28:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:12,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-17 16:28:12,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:12,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-17 16:28:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:28:13,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:13,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:13,620 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 155 treesize of output 141 [2023-11-17 16:28:13,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2023-11-17 16:28:13,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:13,627 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 90 treesize of output 71 [2023-11-17 16:28:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:28:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366920790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:14,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:14,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-11-17 16:28:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352852546] [2023-11-17 16:28:14,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:28:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:28:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1302, Unknown=2, NotChecked=0, Total=1406 [2023-11-17 16:28:14,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:28:14,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1413 transitions, 35638 flow. Second operand has 38 states, 38 states have (on average 80.55263157894737) internal successors, (3061), 38 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:14,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:14,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:28:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:18,335 INFO L124 PetriNetUnfolderBase]: 3572/6363 cut-off events. [2023-11-17 16:28:18,335 INFO L125 PetriNetUnfolderBase]: For 85500/85500 co-relation queries the response was YES. [2023-11-17 16:28:18,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62631 conditions, 6363 events. 3572/6363 cut-off events. For 85500/85500 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43834 event pairs, 548 based on Foata normal form. 2/6357 useless extension candidates. Maximal degree in co-relation 62433. Up to 5874 conditions per place. [2023-11-17 16:28:18,412 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 1322 selfloop transitions, 141 changer transitions 25/1488 dead transitions. [2023-11-17 16:28:18,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1488 transitions, 39229 flow [2023-11-17 16:28:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:28:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:28:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2169 transitions. [2023-11-17 16:28:18,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818347193347193 [2023-11-17 16:28:18,415 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2169 transitions. [2023-11-17 16:28:18,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2169 transitions. [2023-11-17 16:28:18,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:18,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2169 transitions. [2023-11-17 16:28:18,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 83.42307692307692) internal successors, (2169), 26 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,446 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,446 INFO L175 Difference]: Start difference. First operand has 531 places, 1413 transitions, 35638 flow. Second operand 26 states and 2169 transitions. [2023-11-17 16:28:18,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1488 transitions, 39229 flow [2023-11-17 16:28:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 1488 transitions, 38840 flow, removed 96 selfloop flow, removed 16 redundant places. [2023-11-17 16:28:20,242 INFO L231 Difference]: Finished difference. Result has 545 places, 1426 transitions, 35880 flow [2023-11-17 16:28:20,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=35288, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=35880, PETRI_PLACES=545, PETRI_TRANSITIONS=1426} [2023-11-17 16:28:20,243 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 524 predicate places. [2023-11-17 16:28:20,243 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1426 transitions, 35880 flow [2023-11-17 16:28:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 80.55263157894737) internal successors, (3061), 38 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:20,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:20,243 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:20,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 16:28:20,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:20,448 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:28:20,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1606458987, now seen corresponding path program 34 times [2023-11-17 16:28:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:20,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717841780] [2023-11-17 16:28:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:21,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:21,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717841780] [2023-11-17 16:28:21,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717841780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:21,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132843949] [2023-11-17 16:28:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:28:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:21,268 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:21,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 16:28:21,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:28:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:21,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 16:28:21,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:21,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-17 16:28:22,150 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-17 16:28:22,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-11-17 16:28:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:22,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:22,755 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:28:22,755 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 95 treesize of output 98 [2023-11-17 16:28:22,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:22,764 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 53 treesize of output 40 [2023-11-17 16:28:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:23,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132843949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:23,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:23,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:28:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679132239] [2023-11-17 16:28:23,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:28:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:28:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1708, Unknown=5, NotChecked=0, Total=1892 [2023-11-17 16:28:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:28:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1426 transitions, 35880 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:28:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:34,161 WARN L293 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 130 DAG size of output: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 16:28:38,815 INFO L124 PetriNetUnfolderBase]: 3671/6581 cut-off events. [2023-11-17 16:28:38,815 INFO L125 PetriNetUnfolderBase]: For 90378/90378 co-relation queries the response was YES. [2023-11-17 16:28:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64455 conditions, 6581 events. 3671/6581 cut-off events. For 90378/90378 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46210 event pairs, 537 based on Foata normal form. 4/6577 useless extension candidates. Maximal degree in co-relation 64251. Up to 2916 conditions per place. [2023-11-17 16:28:38,899 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 744 selfloop transitions, 778 changer transitions 29/1551 dead transitions. [2023-11-17 16:28:38,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 1551 transitions, 40420 flow [2023-11-17 16:28:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:28:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:28:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2370 transitions. [2023-11-17 16:28:38,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2859555984555985 [2023-11-17 16:28:38,901 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2370 transitions. [2023-11-17 16:28:38,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2370 transitions. [2023-11-17 16:28:38,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:38,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2370 transitions. [2023-11-17 16:28:38,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 84.64285714285714) internal successors, (2370), 28 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 296.0) internal successors, (8584), 29 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 296.0) internal successors, (8584), 29 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:38,909 INFO L175 Difference]: Start difference. First operand has 545 places, 1426 transitions, 35880 flow. Second operand 28 states and 2370 transitions. [2023-11-17 16:28:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 1551 transitions, 40420 flow [2023-11-17 16:28:40,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1551 transitions, 40117 flow, removed 64 selfloop flow, removed 17 redundant places. [2023-11-17 16:28:40,893 INFO L231 Difference]: Finished difference. Result has 563 places, 1464 transitions, 38767 flow [2023-11-17 16:28:40,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=35595, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=38767, PETRI_PLACES=563, PETRI_TRANSITIONS=1464} [2023-11-17 16:28:40,894 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 542 predicate places. [2023-11-17 16:28:40,894 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1464 transitions, 38767 flow [2023-11-17 16:28:40,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:40,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:40,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:40,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 16:28:41,100 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:28:41,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 15992617, now seen corresponding path program 35 times [2023-11-17 16:28:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:41,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480752711] [2023-11-17 16:28:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:42,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:42,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480752711] [2023-11-17 16:28:42,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480752711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:42,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646121743] [2023-11-17 16:28:42,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:28:42,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:42,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:42,052 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:42,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 16:28:42,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:28:42,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:42,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 16:28:42,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:42,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-17 16:28:42,907 INFO L349 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-11-17 16:28:42,907 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 44 treesize of output 18 [2023-11-17 16:28:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:43,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:43,892 INFO L349 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-11-17 16:28:43,892 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 122 treesize of output 122 [2023-11-17 16:28:43,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:43,901 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 81 treesize of output 78 [2023-11-17 16:28:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646121743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:28:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860140078] [2023-11-17 16:28:44,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:28:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:28:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1636, Unknown=1, NotChecked=0, Total=1892 [2023-11-17 16:28:44,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:28:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1464 transitions, 38767 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:44,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:44,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:28:44,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:54,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:28:56,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:28:58,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:05,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:08,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:10,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:13,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:15,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:18,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:22,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:22,772 INFO L124 PetriNetUnfolderBase]: 3836/6870 cut-off events. [2023-11-17 16:29:22,773 INFO L125 PetriNetUnfolderBase]: For 102177/102177 co-relation queries the response was YES. [2023-11-17 16:29:22,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70775 conditions, 6870 events. 3836/6870 cut-off events. For 102177/102177 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 48588 event pairs, 596 based on Foata normal form. 5/6867 useless extension candidates. Maximal degree in co-relation 70563. Up to 6007 conditions per place. [2023-11-17 16:29:22,866 INFO L140 encePairwiseOnDemand]: 284/296 looper letters, 1244 selfloop transitions, 385 changer transitions 37/1666 dead transitions. [2023-11-17 16:29:22,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1666 transitions, 45462 flow [2023-11-17 16:29:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:29:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:29:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3340 transitions. [2023-11-17 16:29:22,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28209459459459457 [2023-11-17 16:29:22,873 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3340 transitions. [2023-11-17 16:29:22,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3340 transitions. [2023-11-17 16:29:22,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:29:22,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3340 transitions. [2023-11-17 16:29:22,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 83.5) internal successors, (3340), 40 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:22,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 296.0) internal successors, (12136), 41 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:22,881 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 296.0) internal successors, (12136), 41 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:22,881 INFO L175 Difference]: Start difference. First operand has 563 places, 1464 transitions, 38767 flow. Second operand 40 states and 3340 transitions. [2023-11-17 16:29:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1666 transitions, 45462 flow [2023-11-17 16:29:25,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1666 transitions, 45151 flow, removed 98 selfloop flow, removed 16 redundant places. [2023-11-17 16:29:25,213 INFO L231 Difference]: Finished difference. Result has 597 places, 1572 transitions, 42659 flow [2023-11-17 16:29:25,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=38476, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42659, PETRI_PLACES=597, PETRI_TRANSITIONS=1572} [2023-11-17 16:29:25,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 576 predicate places. [2023-11-17 16:29:25,214 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1572 transitions, 42659 flow [2023-11-17 16:29:25,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:25,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:29:25,215 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:29:25,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 16:29:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-17 16:29:25,420 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:29:25,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:29:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash -433959661, now seen corresponding path program 36 times [2023-11-17 16:29:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:29:25,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315288124] [2023-11-17 16:29:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:29:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:29:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:29:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:26,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:29:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315288124] [2023-11-17 16:29:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315288124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:29:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626504658] [2023-11-17 16:29:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:29:26,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:29:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:29:26,144 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:29:26,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 16:29:26,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:29:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:29:26,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-17 16:29:26,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:29:26,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-17 16:29:26,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:29:26,860 INFO L349 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-17 16:29:26,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-11-17 16:29:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:27,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:29:28,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:28,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 228 treesize of output 248 [2023-11-17 16:29:28,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:28,088 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 165 treesize of output 163 [2023-11-17 16:29:28,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:28,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 156 [2023-11-17 16:29:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:31,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626504658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:29:31,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:29:31,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:29:31,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487906140] [2023-11-17 16:29:31,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:29:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:29:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:29:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:29:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1709, Unknown=2, NotChecked=0, Total=1892 [2023-11-17 16:29:31,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:29:31,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1572 transitions, 42659 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:31,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:29:31,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:29:31,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:29:41,398 INFO L124 PetriNetUnfolderBase]: 3922/7052 cut-off events. [2023-11-17 16:29:41,399 INFO L125 PetriNetUnfolderBase]: For 110959/110959 co-relation queries the response was YES. [2023-11-17 16:29:41,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74238 conditions, 7052 events. 3922/7052 cut-off events. For 110959/110959 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50415 event pairs, 807 based on Foata normal form. 2/7038 useless extension candidates. Maximal degree in co-relation 74016. Up to 6564 conditions per place. [2023-11-17 16:29:41,503 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 1501 selfloop transitions, 140 changer transitions 40/1681 dead transitions. [2023-11-17 16:29:41,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1681 transitions, 47595 flow [2023-11-17 16:29:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:29:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:29:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2422 transitions. [2023-11-17 16:29:41,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821528424976701 [2023-11-17 16:29:41,506 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2422 transitions. [2023-11-17 16:29:41,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2422 transitions. [2023-11-17 16:29:41,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:29:41,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2422 transitions. [2023-11-17 16:29:41,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 83.51724137931035) internal successors, (2422), 29 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:41,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:41,512 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 296.0) internal successors, (8880), 30 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:41,512 INFO L175 Difference]: Start difference. First operand has 597 places, 1572 transitions, 42659 flow. Second operand 29 states and 2422 transitions. [2023-11-17 16:29:41,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1681 transitions, 47595 flow [2023-11-17 16:29:44,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1681 transitions, 46924 flow, removed 127 selfloop flow, removed 19 redundant places. [2023-11-17 16:29:44,383 INFO L231 Difference]: Finished difference. Result has 611 places, 1604 transitions, 43453 flow [2023-11-17 16:29:44,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=42023, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=43453, PETRI_PLACES=611, PETRI_TRANSITIONS=1604} [2023-11-17 16:29:44,384 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 590 predicate places. [2023-11-17 16:29:44,384 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1604 transitions, 43453 flow [2023-11-17 16:29:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:29:44,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:29:44,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 16:29:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 16:29:44,591 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:29:44,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:29:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash 394433827, now seen corresponding path program 37 times [2023-11-17 16:29:44,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:29:44,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321041994] [2023-11-17 16:29:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:29:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:29:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:29:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:29:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321041994] [2023-11-17 16:29:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321041994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:29:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106404997] [2023-11-17 16:29:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:29:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:29:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:29:45,415 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:29:45,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 16:29:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:29:45,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:29:45,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:29:45,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-17 16:29:45,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:29:46,203 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-17 16:29:46,203 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 45 treesize of output 18 [2023-11-17 16:29:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:46,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:29:46,947 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:29:46,947 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 148 treesize of output 143 [2023-11-17 16:29:46,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:46,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 102 [2023-11-17 16:29:46,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2023-11-17 16:29:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106404997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:29:48,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:29:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:29:48,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212453752] [2023-11-17 16:29:48,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:29:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:29:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:29:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:29:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1673, Unknown=4, NotChecked=0, Total=1892 [2023-11-17 16:29:48,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:29:48,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1604 transitions, 43453 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:29:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:29:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:29:50,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:29:58,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 16:30:02,963 INFO L124 PetriNetUnfolderBase]: 3965/7141 cut-off events. [2023-11-17 16:30:02,963 INFO L125 PetriNetUnfolderBase]: For 113960/113960 co-relation queries the response was YES. [2023-11-17 16:30:03,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74940 conditions, 7141 events. 3965/7141 cut-off events. For 113960/113960 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51235 event pairs, 630 based on Foata normal form. 4/7129 useless extension candidates. Maximal degree in co-relation 74713. Up to 3645 conditions per place. [2023-11-17 16:30:03,070 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 834 selfloop transitions, 843 changer transitions 24/1701 dead transitions. [2023-11-17 16:30:03,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1701 transitions, 48134 flow [2023-11-17 16:30:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:30:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:30:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2185 transitions. [2023-11-17 16:30:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2839137214137214 [2023-11-17 16:30:03,072 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2185 transitions. [2023-11-17 16:30:03,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2185 transitions. [2023-11-17 16:30:03,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:03,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2185 transitions. [2023-11-17 16:30:03,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.03846153846153) internal successors, (2185), 26 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:03,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:03,077 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 296.0) internal successors, (7992), 27 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:03,077 INFO L175 Difference]: Start difference. First operand has 611 places, 1604 transitions, 43453 flow. Second operand 26 states and 2185 transitions. [2023-11-17 16:30:03,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1701 transitions, 48134 flow [2023-11-17 16:30:06,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1701 transitions, 47893 flow, removed 66 selfloop flow, removed 17 redundant places. [2023-11-17 16:30:06,193 INFO L231 Difference]: Finished difference. Result has 618 places, 1638 transitions, 46270 flow [2023-11-17 16:30:06,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=43231, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=46270, PETRI_PLACES=618, PETRI_TRANSITIONS=1638} [2023-11-17 16:30:06,194 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-11-17 16:30:06,195 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1638 transitions, 46270 flow [2023-11-17 16:30:06,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:06,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:06,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:06,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-17 16:30:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 16:30:06,401 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:30:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1538512851, now seen corresponding path program 38 times [2023-11-17 16:30:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525107931] [2023-11-17 16:30:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:07,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:07,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525107931] [2023-11-17 16:30:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525107931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:07,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979972357] [2023-11-17 16:30:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:30:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:07,260 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:07,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 16:30:07,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:30:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:07,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 16:30:07,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:08,129 INFO L349 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-17 16:30:08,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-11-17 16:30:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:08,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:08,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:08,712 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 83 treesize of output 94 [2023-11-17 16:30:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979972357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:09,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-11-17 16:30:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474519604] [2023-11-17 16:30:09,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:09,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:30:09,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:30:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:30:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:30:09,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1638 transitions, 46270 flow. Second operand has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:09,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:09,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:30:09,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:21,361 INFO L124 PetriNetUnfolderBase]: 4264/7694 cut-off events. [2023-11-17 16:30:21,361 INFO L125 PetriNetUnfolderBase]: For 124628/124628 co-relation queries the response was YES. [2023-11-17 16:30:21,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82764 conditions, 7694 events. 4264/7694 cut-off events. For 124628/124628 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 55661 event pairs, 251 based on Foata normal form. 30/7708 useless extension candidates. Maximal degree in co-relation 82537. Up to 1564 conditions per place. [2023-11-17 16:30:21,604 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 476 selfloop transitions, 1046 changer transitions 384/1906 dead transitions. [2023-11-17 16:30:21,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1906 transitions, 54518 flow [2023-11-17 16:30:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:30:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:30:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3575 transitions. [2023-11-17 16:30:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27449324324324326 [2023-11-17 16:30:21,608 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3575 transitions. [2023-11-17 16:30:21,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3575 transitions. [2023-11-17 16:30:21,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:21,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3575 transitions. [2023-11-17 16:30:21,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 81.25) internal successors, (3575), 44 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:21,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 296.0) internal successors, (13320), 45 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:21,616 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 296.0) internal successors, (13320), 45 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:21,616 INFO L175 Difference]: Start difference. First operand has 618 places, 1638 transitions, 46270 flow. Second operand 44 states and 3575 transitions. [2023-11-17 16:30:21,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1906 transitions, 54518 flow [2023-11-17 16:30:24,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1906 transitions, 54212 flow, removed 96 selfloop flow, removed 17 redundant places. [2023-11-17 16:30:25,038 INFO L231 Difference]: Finished difference. Result has 651 places, 1441 transitions, 43820 flow [2023-11-17 16:30:25,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=45958, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=43820, PETRI_PLACES=651, PETRI_TRANSITIONS=1441} [2023-11-17 16:30:25,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 630 predicate places. [2023-11-17 16:30:25,040 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 1441 transitions, 43820 flow [2023-11-17 16:30:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:25,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:25,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:25,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:25,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:25,245 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:30:25,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash 780124237, now seen corresponding path program 39 times [2023-11-17 16:30:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:25,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288888936] [2023-11-17 16:30:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:25,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:25,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288888936] [2023-11-17 16:30:25,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288888936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:25,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247410858] [2023-11-17 16:30:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:30:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:25,904 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:25,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 16:30:26,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:30:26,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:26,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-17 16:30:26,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:30:26,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:30:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:30:26,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:27,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:27,268 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 272 treesize of output 231 [2023-11-17 16:30:27,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:27,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 189 [2023-11-17 16:30:27,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:27,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 156 [2023-11-17 16:30:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:30:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247410858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:28,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:28,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-11-17 16:30:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235336480] [2023-11-17 16:30:28,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:28,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:30:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:30:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1293, Unknown=9, NotChecked=0, Total=1406 [2023-11-17 16:30:28,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:30:28,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1441 transitions, 43820 flow. Second operand has 38 states, 38 states have (on average 80.55263157894737) internal successors, (3061), 38 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:28,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:28,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:30:28,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:34,259 INFO L124 PetriNetUnfolderBase]: 3309/6073 cut-off events. [2023-11-17 16:30:34,259 INFO L125 PetriNetUnfolderBase]: For 107348/107348 co-relation queries the response was YES. [2023-11-17 16:30:34,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69928 conditions, 6073 events. 3309/6073 cut-off events. For 107348/107348 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42565 event pairs, 663 based on Foata normal form. 4/6073 useless extension candidates. Maximal degree in co-relation 69694. Up to 5626 conditions per place. [2023-11-17 16:30:34,347 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 1339 selfloop transitions, 150 changer transitions 39/1528 dead transitions. [2023-11-17 16:30:34,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1528 transitions, 47602 flow [2023-11-17 16:30:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:30:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:30:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2983 transitions. [2023-11-17 16:30:34,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2799361861861862 [2023-11-17 16:30:34,349 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2983 transitions. [2023-11-17 16:30:34,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2983 transitions. [2023-11-17 16:30:34,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:34,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2983 transitions. [2023-11-17 16:30:34,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 82.86111111111111) internal successors, (2983), 36 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:34,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 296.0) internal successors, (10952), 37 states have internal predecessors, (10952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:34,356 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 296.0) internal successors, (10952), 37 states have internal predecessors, (10952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:34,356 INFO L175 Difference]: Start difference. First operand has 651 places, 1441 transitions, 43820 flow. Second operand 36 states and 2983 transitions. [2023-11-17 16:30:34,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1528 transitions, 47602 flow [2023-11-17 16:30:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1528 transitions, 45705 flow, removed 235 selfloop flow, removed 39 redundant places. [2023-11-17 16:30:37,247 INFO L231 Difference]: Finished difference. Result has 632 places, 1450 transitions, 42542 flow [2023-11-17 16:30:37,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=41946, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=42542, PETRI_PLACES=632, PETRI_TRANSITIONS=1450} [2023-11-17 16:30:37,248 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 611 predicate places. [2023-11-17 16:30:37,248 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 1450 transitions, 42542 flow [2023-11-17 16:30:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 80.55263157894737) internal successors, (3061), 38 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:37,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:37,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:37,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 16:30:37,454 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:30:37,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1445799379, now seen corresponding path program 40 times [2023-11-17 16:30:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066623139] [2023-11-17 16:30:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:38,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066623139] [2023-11-17 16:30:38,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066623139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:38,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089310869] [2023-11-17 16:30:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:30:38,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:38,201 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:38,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 16:30:38,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:30:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:38,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-17 16:30:38,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:38,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 16:30:38,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:30:39,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:39,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 16:30:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:39,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:39,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:39,766 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 152 treesize of output 145 [2023-11-17 16:30:39,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:30:39,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 103 [2023-11-17 16:30:39,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 77 [2023-11-17 16:30:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089310869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:40,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:30:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664735373] [2023-11-17 16:30:40,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:30:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:30:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1674, Unknown=3, NotChecked=0, Total=1892 [2023-11-17 16:30:40,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:30:40,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1450 transitions, 42542 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:40,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:40,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:30:40,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:43,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:30:52,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:30:56,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:30:59,939 INFO L124 PetriNetUnfolderBase]: 3474/6330 cut-off events. [2023-11-17 16:30:59,939 INFO L125 PetriNetUnfolderBase]: For 97284/97284 co-relation queries the response was YES. [2023-11-17 16:31:00,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70394 conditions, 6330 events. 3474/6330 cut-off events. For 97284/97284 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44859 event pairs, 522 based on Foata normal form. 9/6327 useless extension candidates. Maximal degree in co-relation 70178. Up to 5503 conditions per place. [2023-11-17 16:31:00,237 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1248 selfloop transitions, 357 changer transitions 38/1643 dead transitions. [2023-11-17 16:31:00,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1643 transitions, 49089 flow [2023-11-17 16:31:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:31:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:31:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3748 transitions. [2023-11-17 16:31:00,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28138138138138136 [2023-11-17 16:31:00,241 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3748 transitions. [2023-11-17 16:31:00,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3748 transitions. [2023-11-17 16:31:00,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:00,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3748 transitions. [2023-11-17 16:31:00,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 83.28888888888889) internal successors, (3748), 45 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:00,249 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:00,249 INFO L175 Difference]: Start difference. First operand has 632 places, 1450 transitions, 42542 flow. Second operand 45 states and 3748 transitions. [2023-11-17 16:31:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1643 transitions, 49089 flow [2023-11-17 16:31:02,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1643 transitions, 48587 flow, removed 95 selfloop flow, removed 32 redundant places. [2023-11-17 16:31:02,636 INFO L231 Difference]: Finished difference. Result has 650 places, 1544 transitions, 45904 flow [2023-11-17 16:31:02,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=41938, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=45904, PETRI_PLACES=650, PETRI_TRANSITIONS=1544} [2023-11-17 16:31:02,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 629 predicate places. [2023-11-17 16:31:02,637 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1544 transitions, 45904 flow [2023-11-17 16:31:02,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:02,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:02,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:02,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 16:31:02,843 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:31:02,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2017254185, now seen corresponding path program 41 times [2023-11-17 16:31:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:02,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752845648] [2023-11-17 16:31:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752845648] [2023-11-17 16:31:03,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752845648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437962831] [2023-11-17 16:31:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:31:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:03,848 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:03,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 16:31:04,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:31:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:04,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 16:31:04,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:04,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-17 16:31:04,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:31:04,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:31:04,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 7 [2023-11-17 16:31:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:04,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:05,331 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:31:05,332 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 148 treesize of output 143 [2023-11-17 16:31:05,348 INFO L349 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-17 16:31:05,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 94 [2023-11-17 16:31:05,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2023-11-17 16:31:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437962831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:06,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:06,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-17 16:31:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086493428] [2023-11-17 16:31:06,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:06,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:31:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:31:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1678, Unknown=2, NotChecked=0, Total=1892 [2023-11-17 16:31:06,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 296 [2023-11-17 16:31:06,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1544 transitions, 45904 flow. Second operand has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:06,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:06,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 296 [2023-11-17 16:31:06,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:13,435 INFO L124 PetriNetUnfolderBase]: 3578/6536 cut-off events. [2023-11-17 16:31:13,435 INFO L125 PetriNetUnfolderBase]: For 103236/103236 co-relation queries the response was YES. [2023-11-17 16:31:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74355 conditions, 6536 events. 3578/6536 cut-off events. For 103236/103236 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46621 event pairs, 360 based on Foata normal form. 7/6543 useless extension candidates. Maximal degree in co-relation 74134. Up to 4683 conditions per place. [2023-11-17 16:31:13,536 INFO L140 encePairwiseOnDemand]: 284/296 looper letters, 1136 selfloop transitions, 545 changer transitions 32/1713 dead transitions. [2023-11-17 16:31:13,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 1713 transitions, 52360 flow [2023-11-17 16:31:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:31:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:31:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4062 transitions. [2023-11-17 16:31:13,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2800606729178158 [2023-11-17 16:31:13,539 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4062 transitions. [2023-11-17 16:31:13,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4062 transitions. [2023-11-17 16:31:13,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:13,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4062 transitions. [2023-11-17 16:31:13,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 82.89795918367346) internal successors, (4062), 49 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:13,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 296.0) internal successors, (14800), 50 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:13,548 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 296.0) internal successors, (14800), 50 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:13,548 INFO L175 Difference]: Start difference. First operand has 650 places, 1544 transitions, 45904 flow. Second operand 49 states and 4062 transitions. [2023-11-17 16:31:13,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 1713 transitions, 52360 flow [2023-11-17 16:31:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1713 transitions, 52019 flow, removed 119 selfloop flow, removed 23 redundant places. [2023-11-17 16:31:16,410 INFO L231 Difference]: Finished difference. Result has 685 places, 1615 transitions, 49388 flow [2023-11-17 16:31:16,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=45581, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=49388, PETRI_PLACES=685, PETRI_TRANSITIONS=1615} [2023-11-17 16:31:16,412 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2023-11-17 16:31:16,412 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1615 transitions, 49388 flow [2023-11-17 16:31:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.43181818181819) internal successors, (3539), 44 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:16,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:16,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:16,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:16,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 16:31:16,617 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:31:16,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1673010523, now seen corresponding path program 42 times [2023-11-17 16:31:16,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:16,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121523133] [2023-11-17 16:31:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:16,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121523133] [2023-11-17 16:31:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121523133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788506910] [2023-11-17 16:31:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:31:17,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:17,161 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:17,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 16:31:17,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:31:17,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:17,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-17 16:31:17,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:17,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:18,493 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:31:18,493 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 67 treesize of output 59 [2023-11-17 16:31:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788506910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:19,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:19,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:31:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167492022] [2023-11-17 16:31:19,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:19,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:31:19,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:31:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:31:19,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:31:19,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1615 transitions, 49388 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:19,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:19,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:31:19,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:25,612 INFO L124 PetriNetUnfolderBase]: 3589/6557 cut-off events. [2023-11-17 16:31:25,612 INFO L125 PetriNetUnfolderBase]: For 107389/107389 co-relation queries the response was YES. [2023-11-17 16:31:25,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76635 conditions, 6557 events. 3589/6557 cut-off events. For 107389/107389 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46826 event pairs, 731 based on Foata normal form. 8/6565 useless extension candidates. Maximal degree in co-relation 76402. Up to 6078 conditions per place. [2023-11-17 16:31:25,728 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1502 selfloop transitions, 180 changer transitions 38/1720 dead transitions. [2023-11-17 16:31:25,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 1720 transitions, 54516 flow [2023-11-17 16:31:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:31:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:31:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3083 transitions. [2023-11-17 16:31:25,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2975868725868726 [2023-11-17 16:31:25,731 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3083 transitions. [2023-11-17 16:31:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3083 transitions. [2023-11-17 16:31:25,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:25,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3083 transitions. [2023-11-17 16:31:25,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 88.08571428571429) internal successors, (3083), 35 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:25,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:25,738 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 296.0) internal successors, (10656), 36 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:25,738 INFO L175 Difference]: Start difference. First operand has 685 places, 1615 transitions, 49388 flow. Second operand 35 states and 3083 transitions. [2023-11-17 16:31:25,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 1720 transitions, 54516 flow [2023-11-17 16:31:29,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1720 transitions, 54050 flow, removed 117 selfloop flow, removed 28 redundant places. [2023-11-17 16:31:29,036 INFO L231 Difference]: Finished difference. Result has 699 places, 1642 transitions, 50626 flow [2023-11-17 16:31:29,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=48928, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=50626, PETRI_PLACES=699, PETRI_TRANSITIONS=1642} [2023-11-17 16:31:29,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 678 predicate places. [2023-11-17 16:31:29,038 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 1642 transitions, 50626 flow [2023-11-17 16:31:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:29,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:29,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:29,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:29,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:29,243 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:31:29,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 526673133, now seen corresponding path program 43 times [2023-11-17 16:31:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304188238] [2023-11-17 16:31:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:29,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304188238] [2023-11-17 16:31:29,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304188238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381558890] [2023-11-17 16:31:29,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:31:29,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:29,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:29,821 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:29,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 16:31:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:30,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:31:30,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:30,438 INFO L349 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-11-17 16:31:30,438 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 45 treesize of output 38 [2023-11-17 16:31:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:30,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:30,966 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:31:30,966 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 66 treesize of output 69 [2023-11-17 16:31:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:31,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381558890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:31,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:31,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:31:31,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114707912] [2023-11-17 16:31:31,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:31,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:31:31,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:31,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:31:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:31:31,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:31:31,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 1642 transitions, 50626 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:31,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:31,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:31:31,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:39,523 INFO L124 PetriNetUnfolderBase]: 3600/6563 cut-off events. [2023-11-17 16:31:39,523 INFO L125 PetriNetUnfolderBase]: For 108333/108333 co-relation queries the response was YES. [2023-11-17 16:31:39,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76973 conditions, 6563 events. 3600/6563 cut-off events. For 108333/108333 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 46732 event pairs, 742 based on Foata normal form. 4/6567 useless extension candidates. Maximal degree in co-relation 76732. Up to 2591 conditions per place. [2023-11-17 16:31:39,629 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 788 selfloop transitions, 918 changer transitions 16/1722 dead transitions. [2023-11-17 16:31:39,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1722 transitions, 54730 flow [2023-11-17 16:31:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:31:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:31:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2665 transitions. [2023-11-17 16:31:39,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30011261261261263 [2023-11-17 16:31:39,633 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2665 transitions. [2023-11-17 16:31:39,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2665 transitions. [2023-11-17 16:31:39,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:39,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2665 transitions. [2023-11-17 16:31:39,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 88.83333333333333) internal successors, (2665), 30 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:39,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:39,639 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 296.0) internal successors, (9176), 31 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:39,639 INFO L175 Difference]: Start difference. First operand has 699 places, 1642 transitions, 50626 flow. Second operand 30 states and 2665 transitions. [2023-11-17 16:31:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1722 transitions, 54730 flow [2023-11-17 16:31:42,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1722 transitions, 54417 flow, removed 87 selfloop flow, removed 28 redundant places. [2023-11-17 16:31:42,878 INFO L231 Difference]: Finished difference. Result has 699 places, 1656 transitions, 52703 flow [2023-11-17 16:31:42,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=50283, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=52703, PETRI_PLACES=699, PETRI_TRANSITIONS=1656} [2023-11-17 16:31:42,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 678 predicate places. [2023-11-17 16:31:42,879 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 1656 transitions, 52703 flow [2023-11-17 16:31:42,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:42,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:42,880 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:42,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-17 16:31:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:43,085 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:31:43,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -970915741, now seen corresponding path program 44 times [2023-11-17 16:31:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545262329] [2023-11-17 16:31:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:43,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545262329] [2023-11-17 16:31:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545262329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326801366] [2023-11-17 16:31:43,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:31:43,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:43,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:43,958 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:43,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 16:31:44,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:31:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:44,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-17 16:31:44,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:44,695 INFO L349 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-11-17 16:31:44,696 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 46 treesize of output 18 [2023-11-17 16:31:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:44,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:45,145 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:31:45,145 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 66 treesize of output 69 [2023-11-17 16:31:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326801366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:46,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:46,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-11-17 16:31:46,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994467639] [2023-11-17 16:31:46,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:31:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:31:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:31:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 296 [2023-11-17 16:31:46,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 1656 transitions, 52703 flow. Second operand has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:46,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:46,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 296 [2023-11-17 16:31:46,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:52,727 INFO L124 PetriNetUnfolderBase]: 3590/6532 cut-off events. [2023-11-17 16:31:52,727 INFO L125 PetriNetUnfolderBase]: For 111530/111530 co-relation queries the response was YES. [2023-11-17 16:31:52,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78879 conditions, 6532 events. 3590/6532 cut-off events. For 111530/111530 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46273 event pairs, 756 based on Foata normal form. 2/6534 useless extension candidates. Maximal degree in co-relation 78642. Up to 2831 conditions per place. [2023-11-17 16:31:52,824 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 830 selfloop transitions, 846 changer transitions 23/1699 dead transitions. [2023-11-17 16:31:52,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 1699 transitions, 56248 flow [2023-11-17 16:31:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:31:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:31:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1856 transitions. [2023-11-17 16:31:52,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27262044653349 [2023-11-17 16:31:52,827 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1856 transitions. [2023-11-17 16:31:52,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1856 transitions. [2023-11-17 16:31:52,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:52,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1856 transitions. [2023-11-17 16:31:52,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 80.69565217391305) internal successors, (1856), 23 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:52,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:52,831 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 296.0) internal successors, (7104), 24 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:52,831 INFO L175 Difference]: Start difference. First operand has 699 places, 1656 transitions, 52703 flow. Second operand 23 states and 1856 transitions. [2023-11-17 16:31:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 1699 transitions, 56248 flow [2023-11-17 16:31:55,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 1699 transitions, 55343 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-11-17 16:31:55,915 INFO L231 Difference]: Finished difference. Result has 692 places, 1649 transitions, 53322 flow [2023-11-17 16:31:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=51795, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=846, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=53322, PETRI_PLACES=692, PETRI_TRANSITIONS=1649} [2023-11-17 16:31:55,917 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2023-11-17 16:31:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 1649 transitions, 53322 flow [2023-11-17 16:31:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 77.5) internal successors, (3255), 42 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:55,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:55,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:55,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:56,122 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:31:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -44781673, now seen corresponding path program 45 times [2023-11-17 16:31:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992028245] [2023-11-17 16:31:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:56,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992028245] [2023-11-17 16:31:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992028245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201427374] [2023-11-17 16:31:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:31:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:56,926 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:56,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 16:31:57,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:31:57,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:57,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 16:31:57,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:57,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:31:57,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2023-11-17 16:31:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:57,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:58,000 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 16:31:58,000 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 67 treesize of output 59 [2023-11-17 16:31:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:58,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201427374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:58,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:58,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:31:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964281547] [2023-11-17 16:31:58,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:58,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:31:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:31:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 16:31:58,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:31:58,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1649 transitions, 53322 flow. Second operand has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:58,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:58,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:31:58,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:04,986 INFO L124 PetriNetUnfolderBase]: 3622/6603 cut-off events. [2023-11-17 16:32:04,987 INFO L125 PetriNetUnfolderBase]: For 111218/111218 co-relation queries the response was YES. [2023-11-17 16:32:05,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80743 conditions, 6603 events. 3622/6603 cut-off events. For 111218/111218 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46565 event pairs, 834 based on Foata normal form. 5/6608 useless extension candidates. Maximal degree in co-relation 80513. Up to 6211 conditions per place. [2023-11-17 16:32:05,171 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 1570 selfloop transitions, 145 changer transitions 29/1744 dead transitions. [2023-11-17 16:32:05,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1744 transitions, 58070 flow [2023-11-17 16:32:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:32:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:32:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3936 transitions. [2023-11-17 16:32:05,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2954954954954955 [2023-11-17 16:32:05,174 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3936 transitions. [2023-11-17 16:32:05,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3936 transitions. [2023-11-17 16:32:05,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:05,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3936 transitions. [2023-11-17 16:32:05,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.46666666666667) internal successors, (3936), 45 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:05,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:05,184 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:05,184 INFO L175 Difference]: Start difference. First operand has 692 places, 1649 transitions, 53322 flow. Second operand 45 states and 3936 transitions. [2023-11-17 16:32:05,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 1744 transitions, 58070 flow [2023-11-17 16:32:08,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1744 transitions, 57775 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-11-17 16:32:08,559 INFO L231 Difference]: Finished difference. Result has 726 places, 1667 transitions, 54233 flow [2023-11-17 16:32:08,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=53031, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=54233, PETRI_PLACES=726, PETRI_TRANSITIONS=1667} [2023-11-17 16:32:08,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 705 predicate places. [2023-11-17 16:32:08,561 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 1667 transitions, 54233 flow [2023-11-17 16:32:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.53658536585365) internal successors, (3507), 41 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:08,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:08,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 16:32:08,767 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:32:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -558830727, now seen corresponding path program 46 times [2023-11-17 16:32:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666025651] [2023-11-17 16:32:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:09,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666025651] [2023-11-17 16:32:09,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666025651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788281848] [2023-11-17 16:32:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:32:09,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:09,698 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 16:32:10,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:32:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:10,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:32:10,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:10,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:10,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:10,739 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 55 treesize of output 39 [2023-11-17 16:32:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 16:32:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788281848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:11,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:11,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 7] total 32 [2023-11-17 16:32:11,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246174879] [2023-11-17 16:32:11,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:32:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:32:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:32:11,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 296 [2023-11-17 16:32:11,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1667 transitions, 54233 flow. Second operand has 34 states, 34 states have (on average 85.76470588235294) internal successors, (2916), 34 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:11,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:11,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 296 [2023-11-17 16:32:11,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:32:15,284 INFO L124 PetriNetUnfolderBase]: 3600/6535 cut-off events. [2023-11-17 16:32:15,284 INFO L125 PetriNetUnfolderBase]: For 111052/111052 co-relation queries the response was YES. [2023-11-17 16:32:15,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80504 conditions, 6535 events. 3600/6535 cut-off events. For 111052/111052 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46052 event pairs, 837 based on Foata normal form. 1/6536 useless extension candidates. Maximal degree in co-relation 80265. Up to 6289 conditions per place. [2023-11-17 16:32:15,383 INFO L140 encePairwiseOnDemand]: 286/296 looper letters, 1588 selfloop transitions, 86 changer transitions 10/1684 dead transitions. [2023-11-17 16:32:15,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 1684 transitions, 57649 flow [2023-11-17 16:32:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:32:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:32:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1141 transitions. [2023-11-17 16:32:15,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965176715176715 [2023-11-17 16:32:15,385 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1141 transitions. [2023-11-17 16:32:15,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1141 transitions. [2023-11-17 16:32:15,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:32:15,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1141 transitions. [2023-11-17 16:32:15,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.76923076923077) internal successors, (1141), 13 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:15,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 296.0) internal successors, (4144), 14 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:15,388 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 296.0) internal successors, (4144), 14 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:15,388 INFO L175 Difference]: Start difference. First operand has 726 places, 1667 transitions, 54233 flow. Second operand 13 states and 1141 transitions. [2023-11-17 16:32:15,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 1684 transitions, 57649 flow Received shutdown request... [2023-11-17 16:32:16,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:32:16,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 16:32:16,764 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:32:16,764 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:32:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-17 16:32:16,957 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:32:16,959 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:32:16,959 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:32:16,959 INFO L445 BasicCegarLoop]: Path program histogram: [46, 3, 3, 2, 1] [2023-11-17 16:32:16,961 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:32:16,961 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:32:16,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:32:16 BasicIcfg [2023-11-17 16:32:16,963 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:32:16,963 INFO L158 Benchmark]: Toolchain (without parser) took 544608.07ms. Allocated memory was 245.4MB in the beginning and 3.2GB in the end (delta: 2.9GB). Free memory was 180.4MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2023-11-17 16:32:16,963 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 245.4MB. Free memory is still 195.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:32:16,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.64ms. Allocated memory is still 245.4MB. Free memory was 180.2MB in the beginning and 168.4MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:32:16,963 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.61ms. Allocated memory is still 245.4MB. Free memory was 168.2MB in the beginning and 166.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:32:16,976 INFO L158 Benchmark]: Boogie Preprocessor took 18.90ms. Allocated memory is still 245.4MB. Free memory was 166.1MB in the beginning and 164.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:32:16,977 INFO L158 Benchmark]: RCFGBuilder took 437.38ms. Allocated memory was 245.4MB in the beginning and 379.6MB in the end (delta: 134.2MB). Free memory was 164.5MB in the beginning and 320.4MB in the end (delta: -156.0MB). Peak memory consumption was 6.5MB. Max. memory is 8.0GB. [2023-11-17 16:32:16,977 INFO L158 Benchmark]: TraceAbstraction took 543940.69ms. Allocated memory was 379.6MB in the beginning and 3.2GB in the end (delta: 2.8GB). Free memory was 319.9MB in the beginning and 2.4GB in the end (delta: -2.1GB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2023-11-17 16:32:16,977 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 245.4MB. Free memory is still 195.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.64ms. Allocated memory is still 245.4MB. Free memory was 180.2MB in the beginning and 168.4MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.61ms. Allocated memory is still 245.4MB. Free memory was 168.2MB in the beginning and 166.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.90ms. Allocated memory is still 245.4MB. Free memory was 166.1MB in the beginning and 164.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 437.38ms. Allocated memory was 245.4MB in the beginning and 379.6MB in the end (delta: 134.2MB). Free memory was 164.5MB in the beginning and 320.4MB in the end (delta: -156.0MB). Peak memory consumption was 6.5MB. Max. memory is 8.0GB. * TraceAbstraction took 543940.69ms. Allocated memory was 379.6MB in the beginning and 3.2GB in the end (delta: 2.8GB). Free memory was 319.9MB in the beginning and 2.4GB in the end (delta: -2.1GB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 135 PlacesBefore, 21 PlacesAfterwards, 139 TransitionsBefore, 17 TransitionsAfterwards, 816 CoEnabledTransitionPairs, 7 FixpointIterations, 90 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 146 TotalNumberOfCompositions, 895 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 833, independent: 819, independent conditional: 0, independent unconditional: 819, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 592, independent: 585, independent conditional: 0, independent unconditional: 585, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 592, independent: 581, independent conditional: 0, independent unconditional: 581, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 13, independent conditional: 0, independent unconditional: 13, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 833, independent: 234, independent conditional: 0, independent unconditional: 234, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 592, unknown conditional: 0, unknown unconditional: 592] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 543.8s, OverallIterations: 55, TraceHistogramMax: 6, PathProgramHistogramMax: 46, EmptinessCheckTime: 0.0s, AutomataDifference: 417.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 157 mSolverCounterUnknown, 6643 SdHoareTripleChecker+Valid, 141.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6643 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 136.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 370 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2634 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 58608 IncrementalHoareTripleChecker+Invalid, 61769 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2634 mSolverCounterUnsat, 0 mSDtfsCounter, 58608 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3488 GetRequests, 850 SyntacticMatches, 8 SemanticMatches, 2630 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 30341 ImplicationChecksByTransitivity, 184.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54233occurred in iteration=54, InterpolantAutomatonStates: 1450, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 99.7s InterpolantComputationTime, 2059 NumberOfCodeBlocks, 2055 NumberOfCodeBlocksAsserted, 158 NumberOfCheckSat, 2882 ConstructedInterpolants, 261 QuantifiedInterpolants, 78946 SizeOfPredicates, 658 NumberOfNonLiveVariables, 11126 ConjunctsInSsa, 2422 ConjunctsInUnsatCore, 154 InterpolantComputations, 6 PerfectInterpolantSequences, 182/1456 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown