/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:07:46,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:07:46,613 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 16:07:46,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:07:46,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:07:46,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:07:46,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:07:46,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:07:46,648 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:07:46,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:07:46,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:07:46,652 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:07:46,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:07:46,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:07:46,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:07:46,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:07:46,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:07:46,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:07:46,656 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:07:46,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:07:46,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:07:46,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:07:46,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:07:46,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:07:46,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:07:46,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:07:46,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:07:46,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:07:46,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:07:46,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:07:46,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:07:46,886 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:07:46,886 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:07:46,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 16:07:48,070 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:07:48,274 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:07:48,275 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 16:07:48,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2388e9144/7ad566d4e34d407fbec85bb572a4dc6f/FLAG9f1a7ca6f [2023-11-17 16:07:48,302 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2388e9144/7ad566d4e34d407fbec85bb572a4dc6f [2023-11-17 16:07:48,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:07:48,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:07:48,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:07:48,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:07:48,312 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:07:48,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aeb81ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48, skipping insertion in model container [2023-11-17 16:07:48,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,350 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:07:48,479 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2023-11-17 16:07:48,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:07:48,496 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:07:48,527 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2023-11-17 16:07:48,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:07:48,543 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:07:48,543 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:07:48,550 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:07:48,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48 WrapperNode [2023-11-17 16:07:48,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:07:48,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:07:48,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:07:48,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:07:48,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,607 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 335 [2023-11-17 16:07:48,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:07:48,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:07:48,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:07:48,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:07:48,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,638 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,638 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,647 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,651 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:07:48,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:07:48,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:07:48,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:07:48,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (1/1) ... [2023-11-17 16:07:48,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:07:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:48,704 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 16:07:48,713 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 16:07:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:07:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:07:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:07:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:07:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:07:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:07:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:07:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:07:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:07:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:07:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:07:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:07:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:07:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:07:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:07:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:07:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:07:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:07:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:07:48,742 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 16:07:48,889 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:07:48,891 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:07:49,407 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:07:49,598 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:07:49,598 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 16:07:49,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:07:49 BoogieIcfgContainer [2023-11-17 16:07:49,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:07:49,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:07:49,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:07:49,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:07:49,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:07:48" (1/3) ... [2023-11-17 16:07:49,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588b2ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:07:49, skipping insertion in model container [2023-11-17 16:07:49,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:48" (2/3) ... [2023-11-17 16:07:49,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588b2ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:07:49, skipping insertion in model container [2023-11-17 16:07:49,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:07:49" (3/3) ... [2023-11-17 16:07:49,607 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 16:07:49,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:07:49,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:07:49,622 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:07:49,699 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:07:49,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 260 transitions, 548 flow [2023-11-17 16:07:49,824 INFO L124 PetriNetUnfolderBase]: 19/256 cut-off events. [2023-11-17 16:07:49,824 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:07:49,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 256 events. 19/256 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 216. Up to 2 conditions per place. [2023-11-17 16:07:49,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 260 transitions, 548 flow [2023-11-17 16:07:49,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 243 transitions, 510 flow [2023-11-17 16:07:49,839 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:07:49,852 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 243 transitions, 510 flow [2023-11-17 16:07:49,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 243 transitions, 510 flow [2023-11-17 16:07:49,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 243 transitions, 510 flow [2023-11-17 16:07:49,904 INFO L124 PetriNetUnfolderBase]: 19/243 cut-off events. [2023-11-17 16:07:49,905 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:07:49,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 216. Up to 2 conditions per place. [2023-11-17 16:07:49,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 2348 [2023-11-17 16:07:58,758 INFO L134 LiptonReduction]: Checked pairs total: 4310 [2023-11-17 16:07:58,758 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-11-17 16:07:58,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:07:58,777 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;@17414167, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:07:58,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:07:58,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:07:58,784 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-17 16:07:58,784 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:07:58,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:58,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:58,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:07:58,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash -44995014, now seen corresponding path program 1 times [2023-11-17 16:07:58,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:58,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660656852] [2023-11-17 16:07:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:58,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:59,463 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 16:07:59,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:59,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660656852] [2023-11-17 16:07:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660656852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:07:59,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:07:59,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:07:59,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943722563] [2023-11-17 16:07:59,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:07:59,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:07:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:07:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:07:59,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 497 [2023-11-17 16:07:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 497 [2023-11-17 16:07:59,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:00,131 INFO L124 PetriNetUnfolderBase]: 3629/4822 cut-off events. [2023-11-17 16:08:00,132 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-17 16:08:00,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9957 conditions, 4822 events. 3629/4822 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19825 event pairs, 279 based on Foata normal form. 0/3852 useless extension candidates. Maximal degree in co-relation 9648. Up to 2855 conditions per place. [2023-11-17 16:08:00,162 INFO L140 encePairwiseOnDemand]: 492/497 looper letters, 70 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-17 16:08:00,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 75 transitions, 340 flow [2023-11-17 16:08:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1185 transitions. [2023-11-17 16:08:00,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768611670020121 [2023-11-17 16:08:00,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1185 transitions. [2023-11-17 16:08:00,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1185 transitions. [2023-11-17 16:08:00,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:00,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1185 transitions. [2023-11-17 16:08:00,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 497.0) internal successors, (2982), 6 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,195 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 497.0) internal successors, (2982), 6 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,196 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 5 states and 1185 transitions. [2023-11-17 16:08:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 75 transitions, 340 flow [2023-11-17 16:08:00,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 75 transitions, 312 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:08:00,208 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 98 flow [2023-11-17 16:08:00,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-17 16:08:00,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-11-17 16:08:00,212 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 98 flow [2023-11-17 16:08:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:00,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:00,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:08:00,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:00,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash -983945911, now seen corresponding path program 1 times [2023-11-17 16:08:00,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:00,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852618037] [2023-11-17 16:08:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:00,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852618037] [2023-11-17 16:08:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852618037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:00,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304898317] [2023-11-17 16:08:00,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:00,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 497 [2023-11-17 16:08:00,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 497 [2023-11-17 16:08:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:00,891 INFO L124 PetriNetUnfolderBase]: 4225/5681 cut-off events. [2023-11-17 16:08:00,891 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2023-11-17 16:08:00,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12199 conditions, 5681 events. 4225/5681 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22256 event pairs, 3392 based on Foata normal form. 130/4899 useless extension candidates. Maximal degree in co-relation 4152. Up to 4511 conditions per place. [2023-11-17 16:08:00,925 INFO L140 encePairwiseOnDemand]: 492/497 looper letters, 35 selfloop transitions, 2 changer transitions 21/60 dead transitions. [2023-11-17 16:08:00,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 267 flow [2023-11-17 16:08:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 871 transitions. [2023-11-17 16:08:00,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381287726358149 [2023-11-17 16:08:00,929 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 871 transitions. [2023-11-17 16:08:00,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 871 transitions. [2023-11-17 16:08:00,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:00,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 871 transitions. [2023-11-17 16:08:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,936 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 98 flow. Second operand 4 states and 871 transitions. [2023-11-17 16:08:00,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 267 flow [2023-11-17 16:08:00,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:00,938 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 108 flow [2023-11-17 16:08:00,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-17 16:08:00,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-11-17 16:08:00,939 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 108 flow [2023-11-17 16:08:00,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:00,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:00,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:00,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1194386180, now seen corresponding path program 1 times [2023-11-17 16:08:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837068445] [2023-11-17 16:08:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:01,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837068445] [2023-11-17 16:08:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837068445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:01,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252823094] [2023-11-17 16:08:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:01,169 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 16:08:01,200 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 16:08:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:01,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:08:01,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:01,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:01,617 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 16:08:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252823094] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:01,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:08:01,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-11-17 16:08:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293334732] [2023-11-17 16:08:01,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:08:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:08:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:01,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-11-17 16:08:01,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:01,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:01,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-11-17 16:08:01,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:02,538 INFO L124 PetriNetUnfolderBase]: 6339/8423 cut-off events. [2023-11-17 16:08:02,538 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2023-11-17 16:08:02,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 8423 events. 6339/8423 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 37247 event pairs, 201 based on Foata normal form. 200/7705 useless extension candidates. Maximal degree in co-relation 19479. Up to 2433 conditions per place. [2023-11-17 16:08:02,595 INFO L140 encePairwiseOnDemand]: 489/497 looper letters, 113 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2023-11-17 16:08:02,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 125 transitions, 578 flow [2023-11-17 16:08:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1632 transitions. [2023-11-17 16:08:02,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691003161828112 [2023-11-17 16:08:02,600 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1632 transitions. [2023-11-17 16:08:02,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1632 transitions. [2023-11-17 16:08:02,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:02,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1632 transitions. [2023-11-17 16:08:02,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 233.14285714285714) internal successors, (1632), 7 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:02,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:02,610 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:02,611 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 108 flow. Second operand 7 states and 1632 transitions. [2023-11-17 16:08:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 125 transitions, 578 flow [2023-11-17 16:08:02,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 125 transitions, 574 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:02,615 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 187 flow [2023-11-17 16:08:02,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-17 16:08:02,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-11-17 16:08:02,616 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 187 flow [2023-11-17 16:08:02,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:02,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:02,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:02,628 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 16:08:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:02,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2050258164, now seen corresponding path program 2 times [2023-11-17 16:08:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:02,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776907817] [2023-11-17 16:08:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:03,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:03,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776907817] [2023-11-17 16:08:03,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776907817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:03,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:03,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32439875] [2023-11-17 16:08:03,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:03,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:03,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 497 [2023-11-17 16:08:03,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:03,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:03,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 497 [2023-11-17 16:08:03,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:04,260 INFO L124 PetriNetUnfolderBase]: 9051/12015 cut-off events. [2023-11-17 16:08:04,261 INFO L125 PetriNetUnfolderBase]: For 8894/8894 co-relation queries the response was YES. [2023-11-17 16:08:04,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 12015 events. 9051/12015 cut-off events. For 8894/8894 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 54208 event pairs, 873 based on Foata normal form. 280/10982 useless extension candidates. Maximal degree in co-relation 34512. Up to 7999 conditions per place. [2023-11-17 16:08:04,333 INFO L140 encePairwiseOnDemand]: 490/497 looper letters, 91 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2023-11-17 16:08:04,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 104 transitions, 598 flow [2023-11-17 16:08:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1398 transitions. [2023-11-17 16:08:04,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688128772635815 [2023-11-17 16:08:04,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1398 transitions. [2023-11-17 16:08:04,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1398 transitions. [2023-11-17 16:08:04,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:04,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1398 transitions. [2023-11-17 16:08:04,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:04,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 497.0) internal successors, (3479), 7 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:04,347 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 497.0) internal successors, (3479), 7 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:04,347 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 187 flow. Second operand 6 states and 1398 transitions. [2023-11-17 16:08:04,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 104 transitions, 598 flow [2023-11-17 16:08:04,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 581 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:04,414 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 286 flow [2023-11-17 16:08:04,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-11-17 16:08:04,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2023-11-17 16:08:04,416 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 286 flow [2023-11-17 16:08:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:04,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:08:04,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1000290480, now seen corresponding path program 1 times [2023-11-17 16:08:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:04,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535562652] [2023-11-17 16:08:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:05,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535562652] [2023-11-17 16:08:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535562652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853977412] [2023-11-17 16:08:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:05,695 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 16:08:05,722 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 16:08:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:05,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:08:05,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:05,882 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 323 treesize of output 315 [2023-11-17 16:08:06,152 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 16 treesize of output 11 [2023-11-17 16:08:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:06,226 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 16 treesize of output 11 [2023-11-17 16:08:06,304 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 15 treesize of output 7 [2023-11-17 16:08:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:06,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:08,431 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_155 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_155) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_156) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 16:08:08,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:08,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 79 [2023-11-17 16:08:08,465 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 68 treesize of output 56 [2023-11-17 16:08:08,472 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 30 treesize of output 24 [2023-11-17 16:08:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853977412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:08,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:08,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-17 16:08:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791971281] [2023-11-17 16:08:08,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:08,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:08:08,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:08:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=438, Unknown=2, NotChecked=42, Total=552 [2023-11-17 16:08:08,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 497 [2023-11-17 16:08:08,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 286 flow. Second operand has 24 states, 24 states have (on average 164.16666666666666) internal successors, (3940), 24 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:08,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:08,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 497 [2023-11-17 16:08:08,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:10,402 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_156 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_156) c_~q1~0.base) .cse0) c_~total~0))) (forall ((v_ArrVal_155 (Array Int Int)) (v_ArrVal_156 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_155) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_156) c_~q1~0.base) .cse0) c_~total~0))))) is different from false [2023-11-17 16:08:16,911 INFO L124 PetriNetUnfolderBase]: 47337/62204 cut-off events. [2023-11-17 16:08:16,912 INFO L125 PetriNetUnfolderBase]: For 94360/94360 co-relation queries the response was YES. [2023-11-17 16:08:17,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194771 conditions, 62204 events. 47337/62204 cut-off events. For 94360/94360 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 334981 event pairs, 5393 based on Foata normal form. 261/54361 useless extension candidates. Maximal degree in co-relation 94855. Up to 17009 conditions per place. [2023-11-17 16:08:17,339 INFO L140 encePairwiseOnDemand]: 471/497 looper letters, 486 selfloop transitions, 128 changer transitions 3/618 dead transitions. [2023-11-17 16:08:17,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 618 transitions, 3819 flow [2023-11-17 16:08:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:08:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:08:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5528 transitions. [2023-11-17 16:08:17,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35879794898422795 [2023-11-17 16:08:17,355 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5528 transitions. [2023-11-17 16:08:17,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5528 transitions. [2023-11-17 16:08:17,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:17,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5528 transitions. [2023-11-17 16:08:17,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 178.32258064516128) internal successors, (5528), 31 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:17,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 497.0) internal successors, (15904), 32 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:17,397 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 497.0) internal successors, (15904), 32 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:17,398 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 286 flow. Second operand 31 states and 5528 transitions. [2023-11-17 16:08:17,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 618 transitions, 3819 flow [2023-11-17 16:08:18,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 618 transitions, 3680 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:18,371 INFO L231 Difference]: Finished difference. Result has 106 places, 184 transitions, 1518 flow [2023-11-17 16:08:18,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1518, PETRI_PLACES=106, PETRI_TRANSITIONS=184} [2023-11-17 16:08:18,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2023-11-17 16:08:18,373 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 184 transitions, 1518 flow [2023-11-17 16:08:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.16666666666666) internal successors, (3940), 24 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:18,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:18,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:18,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 16:08:18,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:18,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:18,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 94603555, now seen corresponding path program 2 times [2023-11-17 16:08:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947522324] [2023-11-17 16:08:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:19,565 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 16:08:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:19,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947522324] [2023-11-17 16:08:19,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947522324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:19,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562492433] [2023-11-17 16:08:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:19,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:19,569 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 16:08:19,572 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 16:08:20,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:20,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:08:20,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:20,267 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 16:08:20,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-17 16:08:20,338 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 16:08:20,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:20,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:20,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 16:08:20,507 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 11 treesize of output 5 [2023-11-17 16:08:20,664 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 16:08:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562492433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:20,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-17 16:08:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773870640] [2023-11-17 16:08:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:08:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:08:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:08:20,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 497 [2023-11-17 16:08:20,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 184 transitions, 1518 flow. Second operand has 21 states, 21 states have (on average 173.23809523809524) internal successors, (3638), 21 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:20,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:20,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 497 [2023-11-17 16:08:20,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:23,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:08:33,899 INFO L124 PetriNetUnfolderBase]: 74521/98146 cut-off events. [2023-11-17 16:08:33,899 INFO L125 PetriNetUnfolderBase]: For 367073/367073 co-relation queries the response was YES. [2023-11-17 16:08:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442586 conditions, 98146 events. 74521/98146 cut-off events. For 367073/367073 co-relation queries the response was YES. Maximal size of possible extension queue 2987. Compared 568136 event pairs, 8555 based on Foata normal form. 198/92840 useless extension candidates. Maximal degree in co-relation 442523. Up to 50594 conditions per place. [2023-11-17 16:08:34,799 INFO L140 encePairwiseOnDemand]: 487/497 looper letters, 319 selfloop transitions, 168 changer transitions 3/491 dead transitions. [2023-11-17 16:08:34,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 491 transitions, 4681 flow [2023-11-17 16:08:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:08:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:08:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3332 transitions. [2023-11-17 16:08:34,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37245696400625977 [2023-11-17 16:08:34,808 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3332 transitions. [2023-11-17 16:08:34,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3332 transitions. [2023-11-17 16:08:34,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:34,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3332 transitions. [2023-11-17 16:08:34,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 185.11111111111111) internal successors, (3332), 18 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 497.0) internal successors, (9443), 19 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,830 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 497.0) internal successors, (9443), 19 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,830 INFO L175 Difference]: Start difference. First operand has 106 places, 184 transitions, 1518 flow. Second operand 18 states and 3332 transitions. [2023-11-17 16:08:34,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 491 transitions, 4681 flow [2023-11-17 16:08:38,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 491 transitions, 4573 flow, removed 52 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:38,903 INFO L231 Difference]: Finished difference. Result has 121 places, 265 transitions, 2827 flow [2023-11-17 16:08:38,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2827, PETRI_PLACES=121, PETRI_TRANSITIONS=265} [2023-11-17 16:08:38,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2023-11-17 16:08:38,905 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 265 transitions, 2827 flow [2023-11-17 16:08:38,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 173.23809523809524) internal successors, (3638), 21 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:38,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:38,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:08:39,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:39,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:39,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -104940229, now seen corresponding path program 3 times [2023-11-17 16:08:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265199424] [2023-11-17 16:08:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:40,107 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 16:08:40,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:40,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265199424] [2023-11-17 16:08:40,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265199424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016247323] [2023-11-17 16:08:40,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:40,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:40,111 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 16:08:40,116 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 16:08:40,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:40,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:40,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:08:40,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:40,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:40,291 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 82 [2023-11-17 16:08:40,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:40,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 16:08:40,556 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 16:08:40,619 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 23 treesize of output 7 [2023-11-17 16:08:40,629 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 16:08:40,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:40,689 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_259) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 16:08:40,705 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int)) (v_ArrVal_258 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_258) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_259) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 16:08:40,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:40,743 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 173 treesize of output 157 [2023-11-17 16:08:40,751 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 31 treesize of output 25 [2023-11-17 16:08:40,832 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 32 treesize of output 20 [2023-11-17 16:08:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-17 16:08:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016247323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:40,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:40,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-17 16:08:40,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015939574] [2023-11-17 16:08:40,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:08:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:08:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=322, Unknown=2, NotChecked=74, Total=462 [2023-11-17 16:08:40,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 497 [2023-11-17 16:08:40,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 265 transitions, 2827 flow. Second operand has 22 states, 22 states have (on average 170.86363636363637) internal successors, (3759), 22 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:40,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:40,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 497 [2023-11-17 16:08:40,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:55,980 INFO L124 PetriNetUnfolderBase]: 95934/126240 cut-off events. [2023-11-17 16:08:55,981 INFO L125 PetriNetUnfolderBase]: For 673018/673018 co-relation queries the response was YES. [2023-11-17 16:08:56,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617137 conditions, 126240 events. 95934/126240 cut-off events. For 673018/673018 co-relation queries the response was YES. Maximal size of possible extension queue 3796. Compared 745889 event pairs, 19221 based on Foata normal form. 2/119165 useless extension candidates. Maximal degree in co-relation 605289. Up to 65305 conditions per place. [2023-11-17 16:08:57,100 INFO L140 encePairwiseOnDemand]: 488/497 looper letters, 267 selfloop transitions, 173 changer transitions 1/442 dead transitions. [2023-11-17 16:08:57,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 442 transitions, 5119 flow [2023-11-17 16:08:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:08:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:08:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2337 transitions. [2023-11-17 16:08:57,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36170871382138986 [2023-11-17 16:08:57,105 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2337 transitions. [2023-11-17 16:08:57,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2337 transitions. [2023-11-17 16:08:57,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:57,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2337 transitions. [2023-11-17 16:08:57,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 179.76923076923077) internal successors, (2337), 13 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:57,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 497.0) internal successors, (6958), 14 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:57,120 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 497.0) internal successors, (6958), 14 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:57,120 INFO L175 Difference]: Start difference. First operand has 121 places, 265 transitions, 2827 flow. Second operand 13 states and 2337 transitions. [2023-11-17 16:08:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 442 transitions, 5119 flow [2023-11-17 16:09:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 442 transitions, 5017 flow, removed 47 selfloop flow, removed 3 redundant places. [2023-11-17 16:09:06,879 INFO L231 Difference]: Finished difference. Result has 131 places, 303 transitions, 3638 flow [2023-11-17 16:09:06,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3638, PETRI_PLACES=131, PETRI_TRANSITIONS=303} [2023-11-17 16:09:06,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2023-11-17 16:09:06,881 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 303 transitions, 3638 flow [2023-11-17 16:09:06,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.86363636363637) internal successors, (3759), 22 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:06,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:07,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:09:07,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash 701704709, now seen corresponding path program 4 times [2023-11-17 16:09:07,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503890470] [2023-11-17 16:09:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:08,099 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 16:09:08,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503890470] [2023-11-17 16:09:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503890470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:08,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982627802] [2023-11-17 16:09:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:08,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:08,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:08,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:08,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:09:08,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:08,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:09:08,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:08,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:08,446 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 39 treesize of output 37 [2023-11-17 16:09:08,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:08,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 16:09:08,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:08,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 16:09:08,969 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 16:09:09,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-17 16:09:09,198 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 16:09:09,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:09,701 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:09:09,701 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 1361 treesize of output 1293 [2023-11-17 16:09:09,719 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 73 treesize of output 67 [2023-11-17 16:09:09,725 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 146 treesize of output 122 [2023-11-17 16:09:09,733 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 66 treesize of output 54 [2023-11-17 16:09:10,082 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 16:09:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982627802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:10,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2023-11-17 16:09:10,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311270815] [2023-11-17 16:09:10,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:10,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:09:10,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:09:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=955, Unknown=8, NotChecked=0, Total=1122 [2023-11-17 16:09:10,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 497 [2023-11-17 16:09:10,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 303 transitions, 3638 flow. Second operand has 34 states, 34 states have (on average 159.44117647058823) internal successors, (5421), 34 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 497 [2023-11-17 16:09:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand