/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:31:10,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:31:10,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:31:10,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:31:10,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:31:10,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:31:10,438 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:31:10,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:31:10,439 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:31:10,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:31:10,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:31:10,440 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:31:10,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:31:10,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:31:10,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:31:10,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:31:10,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:31:10,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:31:10,442 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:31:10,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:31:10,443 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:31:10,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:31:10,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:31:10,444 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:31:10,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:31:10,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:31:10,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:31:10,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:31:10,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:31:10,451 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:31:10,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:31:10,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:31:10,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:31:10,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:31:10,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:31:10,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:31:10,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:31:10,639 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:31:10,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-11-17 12:31:11,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:31:11,954 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:31:11,955 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-11-17 12:31:11,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fc4ab6e7/25254de50fcd442bb33403ac7e8ae5c0/FLAG4b8fcf1ef [2023-11-17 12:31:11,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fc4ab6e7/25254de50fcd442bb33403ac7e8ae5c0 [2023-11-17 12:31:11,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:31:11,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:31:11,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:31:11,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:31:11,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:31:11,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:31:11" (1/1) ... [2023-11-17 12:31:11,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a27c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:11, skipping insertion in model container [2023-11-17 12:31:11,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:31:11" (1/1) ... [2023-11-17 12:31:12,024 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:31:12,161 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-queue-add-3.wvr.c[3451,3464] [2023-11-17 12:31:12,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:31:12,177 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:31:12,211 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-queue-add-3.wvr.c[3451,3464] [2023-11-17 12:31:12,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:31:12,224 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:31:12,225 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:31:12,231 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:31:12,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12 WrapperNode [2023-11-17 12:31:12,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:31:12,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:31:12,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:31:12,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:31:12,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,274 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2023-11-17 12:31:12,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:31:12,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:31:12,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:31:12,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:31:12,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,316 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:31:12,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:31:12,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:31:12,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:31:12,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (1/1) ... [2023-11-17 12:31:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:31:12,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:12,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:31:12,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:31:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:31:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:31:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:31:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:31:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:31:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:31:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:31:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:31:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:31:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:31:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:31:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:31:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:31:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:31:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:31:12,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:31:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:31:12,382 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:31:12,481 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:31:12,482 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:31:12,801 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:31:13,155 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:31:13,155 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 12:31:13,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:31:13 BoogieIcfgContainer [2023-11-17 12:31:13,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:31:13,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:31:13,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:31:13,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:31:13,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:31:11" (1/3) ... [2023-11-17 12:31:13,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6486ba8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:31:13, skipping insertion in model container [2023-11-17 12:31:13,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:12" (2/3) ... [2023-11-17 12:31:13,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6486ba8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:31:13, skipping insertion in model container [2023-11-17 12:31:13,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:31:13" (3/3) ... [2023-11-17 12:31:13,166 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-11-17 12:31:13,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:31:13,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:31:13,182 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:31:13,233 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:31:13,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2023-11-17 12:31:13,299 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2023-11-17 12:31:13,300 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:31:13,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:31:13,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2023-11-17 12:31:13,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2023-11-17 12:31:13,321 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:31:13,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 42 transitions, 102 flow [2023-11-17 12:31:13,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 42 transitions, 102 flow [2023-11-17 12:31:13,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 102 flow [2023-11-17 12:31:13,364 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2023-11-17 12:31:13,364 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:31:13,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 7/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:31:13,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 622 [2023-11-17 12:31:14,287 INFO L134 LiptonReduction]: Checked pairs total: 905 [2023-11-17 12:31:14,288 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 12:31:14,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:31:14,305 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;@50d3cd24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:31:14,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:31:14,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:31:14,313 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-17 12:31:14,313 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:31:14,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:14,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:14,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:14,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash -743999512, now seen corresponding path program 1 times [2023-11-17 12:31:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35077606] [2023-11-17 12:31:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35077606] [2023-11-17 12:31:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35077606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:14,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:31:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001209258] [2023-11-17 12:31:14,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 12:31:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 12:31:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 12:31:14,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:14,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:14,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:14,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:14,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:14,695 INFO L124 PetriNetUnfolderBase]: 291/428 cut-off events. [2023-11-17 12:31:14,695 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 12:31:14,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 428 events. 291/428 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1103 event pairs, 191 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 702. Up to 429 conditions per place. [2023-11-17 12:31:14,702 INFO L140 encePairwiseOnDemand]: 65/66 looper letters, 27 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-17 12:31:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 126 flow [2023-11-17 12:31:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 12:31:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 12:31:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2023-11-17 12:31:14,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 12:31:14,714 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 54 transitions. [2023-11-17 12:31:14,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 54 transitions. [2023-11-17 12:31:14,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:14,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 54 transitions. [2023-11-17 12:31:14,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:14,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:14,725 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:14,727 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 54 transitions. [2023-11-17 12:31:14,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 126 flow [2023-11-17 12:31:14,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:31:14,732 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-11-17 12:31:14,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-17 12:31:14,737 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-17 12:31:14,737 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-11-17 12:31:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:14,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:14,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:14,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:31:14,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:14,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -13082623, now seen corresponding path program 1 times [2023-11-17 12:31:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746565936] [2023-11-17 12:31:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:15,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746565936] [2023-11-17 12:31:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746565936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:31:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284503571] [2023-11-17 12:31:15,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:15,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:31:15,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:15,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:31:15,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:31:15,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:15,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:15,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:15,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:15,187 INFO L124 PetriNetUnfolderBase]: 339/515 cut-off events. [2023-11-17 12:31:15,188 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 12:31:15,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 515 events. 339/515 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1468 event pairs, 230 based on Foata normal form. 34/439 useless extension candidates. Maximal degree in co-relation 1053. Up to 429 conditions per place. [2023-11-17 12:31:15,192 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 26 selfloop transitions, 2 changer transitions 14/42 dead transitions. [2023-11-17 12:31:15,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 177 flow [2023-11-17 12:31:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:31:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:31:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-17 12:31:15,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36742424242424243 [2023-11-17 12:31:15,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-17 12:31:15,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-17 12:31:15,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:15,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-17 12:31:15,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,201 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,202 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 97 transitions. [2023-11-17 12:31:15,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 177 flow [2023-11-17 12:31:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 12:31:15,203 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-11-17 12:31:15,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 12:31:15,205 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-17 12:31:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-11-17 12:31:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:15,207 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] [2023-11-17 12:31:15,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:31:15,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:15,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 621903075, now seen corresponding path program 1 times [2023-11-17 12:31:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529126181] [2023-11-17 12:31:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:31:15,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:15,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529126181] [2023-11-17 12:31:15,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529126181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:15,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:15,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:31:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429935827] [2023-11-17 12:31:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:31:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:31:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:31:15,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:15,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:15,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:15,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:15,512 INFO L124 PetriNetUnfolderBase]: 402/614 cut-off events. [2023-11-17 12:31:15,513 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-17 12:31:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 614 events. 402/614 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1892 event pairs, 282 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1422. Up to 430 conditions per place. [2023-11-17 12:31:15,516 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 27 selfloop transitions, 2 changer transitions 15/44 dead transitions. [2023-11-17 12:31:15,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 208 flow [2023-11-17 12:31:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:31:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:31:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-17 12:31:15,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 12:31:15,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-17 12:31:15,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-17 12:31:15,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:15,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-17 12:31:15,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,519 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,519 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 99 transitions. [2023-11-17 12:31:15,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 208 flow [2023-11-17 12:31:15,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:15,521 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-11-17 12:31:15,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-17 12:31:15,522 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-17 12:31:15,522 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-11-17 12:31:15,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:15,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:15,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:31:15,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:15,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash 243130588, now seen corresponding path program 1 times [2023-11-17 12:31:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:15,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751737517] [2023-11-17 12:31:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:15,729 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 12:31:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751737517] [2023-11-17 12:31:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751737517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:15,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:15,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:31:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459024178] [2023-11-17 12:31:15,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:15,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:31:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:31:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:31:15,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-17 12:31:15,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:15,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:15,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-17 12:31:15,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:15,990 INFO L124 PetriNetUnfolderBase]: 657/965 cut-off events. [2023-11-17 12:31:15,990 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-17 12:31:15,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 965 events. 657/965 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3351 event pairs, 191 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2524. Up to 390 conditions per place. [2023-11-17 12:31:15,996 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 66 selfloop transitions, 8 changer transitions 2/76 dead transitions. [2023-11-17 12:31:15,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 388 flow [2023-11-17 12:31:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:31:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:31:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2023-11-17 12:31:16,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2023-11-17 12:31:16,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 141 transitions. [2023-11-17 12:31:16,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 141 transitions. [2023-11-17 12:31:16,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:16,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 141 transitions. [2023-11-17 12:31:16,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,005 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 6 states and 141 transitions. [2023-11-17 12:31:16,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 388 flow [2023-11-17 12:31:16,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 384 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:16,009 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 148 flow [2023-11-17 12:31:16,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-17 12:31:16,011 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-11-17 12:31:16,011 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 148 flow [2023-11-17 12:31:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:16,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:16,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:31:16,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:16,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1064913926, now seen corresponding path program 1 times [2023-11-17 12:31:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000689951] [2023-11-17 12:31:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:31:16,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000689951] [2023-11-17 12:31:16,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000689951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298887155] [2023-11-17 12:31:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:16,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:16,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:31:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:16,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:31:16,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:31:16,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:31:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298887155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:16,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 12:31:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978830125] [2023-11-17 12:31:16,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:31:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:31:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:31:16,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:16,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:16,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:16,877 INFO L124 PetriNetUnfolderBase]: 1151/1728 cut-off events. [2023-11-17 12:31:16,877 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2023-11-17 12:31:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 1728 events. 1151/1728 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6967 event pairs, 548 based on Foata normal form. 98/1646 useless extension candidates. Maximal degree in co-relation 5290. Up to 965 conditions per place. [2023-11-17 12:31:16,888 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 69 selfloop transitions, 6 changer transitions 7/82 dead transitions. [2023-11-17 12:31:16,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 82 transitions, 506 flow [2023-11-17 12:31:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:31:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:31:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-17 12:31:16,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661616161616162 [2023-11-17 12:31:16,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-17 12:31:16,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-17 12:31:16,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:16,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-17 12:31:16,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,892 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,892 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 148 flow. Second operand 6 states and 145 transitions. [2023-11-17 12:31:16,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 82 transitions, 506 flow [2023-11-17 12:31:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 499 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:16,898 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 210 flow [2023-11-17 12:31:16,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-17 12:31:16,900 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-17 12:31:16,900 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 210 flow [2023-11-17 12:31:16,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:16,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:16,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:16,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:17,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:17,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:17,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:17,108 INFO L85 PathProgramCache]: Analyzing trace with hash -379288506, now seen corresponding path program 1 times [2023-11-17 12:31:17,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:17,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198137334] [2023-11-17 12:31:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:17,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:31:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:17,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198137334] [2023-11-17 12:31:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198137334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:17,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:31:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950976966] [2023-11-17 12:31:17,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:31:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:31:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:31:17,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:17,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:17,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:17,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:17,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:17,574 INFO L124 PetriNetUnfolderBase]: 1721/2670 cut-off events. [2023-11-17 12:31:17,574 INFO L125 PetriNetUnfolderBase]: For 4026/4026 co-relation queries the response was YES. [2023-11-17 12:31:17,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9081 conditions, 2670 events. 1721/2670 cut-off events. For 4026/4026 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12290 event pairs, 400 based on Foata normal form. 204/2494 useless extension candidates. Maximal degree in co-relation 9066. Up to 1093 conditions per place. [2023-11-17 12:31:17,593 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 71 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-11-17 12:31:17,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 577 flow [2023-11-17 12:31:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:31:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:31:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-17 12:31:17,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2023-11-17 12:31:17,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-17 12:31:17,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-17 12:31:17,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:17,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-17 12:31:17,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:17,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:17,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:17,596 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 210 flow. Second operand 4 states and 115 transitions. [2023-11-17 12:31:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 577 flow [2023-11-17 12:31:17,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 523 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-11-17 12:31:17,604 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 282 flow [2023-11-17 12:31:17,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-17 12:31:17,606 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-11-17 12:31:17,606 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 282 flow [2023-11-17 12:31:17,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:17,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:17,607 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] [2023-11-17 12:31:17,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:31:17,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:17,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1359205794, now seen corresponding path program 2 times [2023-11-17 12:31:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:17,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359364552] [2023-11-17 12:31:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:18,349 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 12:31:18,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:18,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359364552] [2023-11-17 12:31:18,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359364552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:18,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92305393] [2023-11-17 12:31:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:31:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:18,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:18,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:31:18,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:31:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:18,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:31:18,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:18,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:18,711 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:31:18,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-17 12:31:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92305393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:18,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:18,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-17 12:31:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937471096] [2023-11-17 12:31:18,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:18,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:31:18,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:31:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:31:18,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:18,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 282 flow. Second operand has 13 states, 13 states have (on average 14.0) internal successors, (182), 13 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:18,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:18,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:18,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:19,360 INFO L124 PetriNetUnfolderBase]: 1599/2552 cut-off events. [2023-11-17 12:31:19,360 INFO L125 PetriNetUnfolderBase]: For 3314/3314 co-relation queries the response was YES. [2023-11-17 12:31:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9252 conditions, 2552 events. 1599/2552 cut-off events. For 3314/3314 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12061 event pairs, 290 based on Foata normal form. 24/2199 useless extension candidates. Maximal degree in co-relation 9236. Up to 1478 conditions per place. [2023-11-17 12:31:19,379 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 103 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2023-11-17 12:31:19,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 130 transitions, 890 flow [2023-11-17 12:31:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:31:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:31:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2023-11-17 12:31:19,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2023-11-17 12:31:19,381 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 234 transitions. [2023-11-17 12:31:19,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 234 transitions. [2023-11-17 12:31:19,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:19,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 234 transitions. [2023-11-17 12:31:19,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.5) internal successors, (234), 12 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:19,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:19,384 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:19,384 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 282 flow. Second operand 12 states and 234 transitions. [2023-11-17 12:31:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 130 transitions, 890 flow [2023-11-17 12:31:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 130 transitions, 824 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-11-17 12:31:19,391 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 424 flow [2023-11-17 12:31:19,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-11-17 12:31:19,392 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2023-11-17 12:31:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 424 flow [2023-11-17 12:31:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.0) internal successors, (182), 13 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:19,393 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] [2023-11-17 12:31:19,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:19,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 12:31:19,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:19,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -798090678, now seen corresponding path program 3 times [2023-11-17 12:31:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:19,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156030436] [2023-11-17 12:31:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:20,249 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 12:31:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156030436] [2023-11-17 12:31:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156030436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585605240] [2023-11-17 12:31:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:31:20,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:20,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:20,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:31:20,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:31:20,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:20,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:31:20,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:20,531 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 12:31:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:31:20,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:20,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:31:20,657 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 12:31:20,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 12:31:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585605240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:20,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:20,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-11-17 12:31:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675327632] [2023-11-17 12:31:20,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:20,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:31:20,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:31:20,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=289, Unknown=4, NotChecked=0, Total=342 [2023-11-17 12:31:20,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:20,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 424 flow. Second operand has 19 states, 19 states have (on average 13.157894736842104) internal successors, (250), 19 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:20,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:20,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:20,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:21,730 INFO L124 PetriNetUnfolderBase]: 1813/2872 cut-off events. [2023-11-17 12:31:21,730 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2023-11-17 12:31:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10985 conditions, 2872 events. 1813/2872 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13709 event pairs, 358 based on Foata normal form. 14/2672 useless extension candidates. Maximal degree in co-relation 10965. Up to 1494 conditions per place. [2023-11-17 12:31:21,752 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 106 selfloop transitions, 31 changer transitions 0/137 dead transitions. [2023-11-17 12:31:21,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 137 transitions, 1057 flow [2023-11-17 12:31:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:31:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:31:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2023-11-17 12:31:21,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28205128205128205 [2023-11-17 12:31:21,754 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 242 transitions. [2023-11-17 12:31:21,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 242 transitions. [2023-11-17 12:31:21,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:21,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 242 transitions. [2023-11-17 12:31:21,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:21,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:21,757 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:21,757 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 424 flow. Second operand 13 states and 242 transitions. [2023-11-17 12:31:21,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 137 transitions, 1057 flow [2023-11-17 12:31:21,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1026 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-17 12:31:21,773 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 544 flow [2023-11-17 12:31:21,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=544, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-17 12:31:21,775 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-11-17 12:31:21,775 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 544 flow [2023-11-17 12:31:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.157894736842104) internal successors, (250), 19 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:21,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:21,776 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] [2023-11-17 12:31:21,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:21,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:21,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:21,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1661081298, now seen corresponding path program 4 times [2023-11-17 12:31:21,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:21,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980457093] [2023-11-17 12:31:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:21,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:22,805 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 12:31:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:22,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980457093] [2023-11-17 12:31:22,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980457093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050134137] [2023-11-17 12:31:22,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:31:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:22,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:22,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:31:22,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:31:22,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:22,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:31:22,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:22,939 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 34 treesize of output 32 [2023-11-17 12:31:23,029 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 12:31:23,097 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 12:31:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:23,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:23,192 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_268 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_268) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-17 12:31:23,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:31:23,247 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 85 treesize of output 77 [2023-11-17 12:31:23,251 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 64 treesize of output 52 [2023-11-17 12:31:23,255 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 52 treesize of output 46 [2023-11-17 12:31:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050134137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:23,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:23,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-17 12:31:23,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952155716] [2023-11-17 12:31:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:23,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:31:23,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:31:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=291, Unknown=2, NotChecked=34, Total=380 [2023-11-17 12:31:23,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:23,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 544 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:23,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:23,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:23,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:24,494 INFO L124 PetriNetUnfolderBase]: 2127/3337 cut-off events. [2023-11-17 12:31:24,494 INFO L125 PetriNetUnfolderBase]: For 9851/9851 co-relation queries the response was YES. [2023-11-17 12:31:24,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14459 conditions, 3337 events. 2127/3337 cut-off events. For 9851/9851 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16314 event pairs, 375 based on Foata normal form. 32/3103 useless extension candidates. Maximal degree in co-relation 14436. Up to 1371 conditions per place. [2023-11-17 12:31:24,528 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 125 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2023-11-17 12:31:24,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 162 transitions, 1393 flow [2023-11-17 12:31:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:31:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:31:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2023-11-17 12:31:24,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28679653679653677 [2023-11-17 12:31:24,530 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 265 transitions. [2023-11-17 12:31:24,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 265 transitions. [2023-11-17 12:31:24,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:24,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 265 transitions. [2023-11-17 12:31:24,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.928571428571427) internal successors, (265), 14 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:24,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:24,533 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:24,533 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 544 flow. Second operand 14 states and 265 transitions. [2023-11-17 12:31:24,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 162 transitions, 1393 flow [2023-11-17 12:31:24,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 162 transitions, 1350 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-17 12:31:24,570 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 725 flow [2023-11-17 12:31:24,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=725, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-17 12:31:24,571 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 57 predicate places. [2023-11-17 12:31:24,571 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 725 flow [2023-11-17 12:31:24,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:24,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:24,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:24,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:24,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:24,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1755459662, now seen corresponding path program 1 times [2023-11-17 12:31:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969704638] [2023-11-17 12:31:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:31:24,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:24,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969704638] [2023-11-17 12:31:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969704638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137351574] [2023-11-17 12:31:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:24,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:24,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:31:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:25,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:31:25,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:31:25,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:31:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137351574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:25,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:25,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-17 12:31:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719406896] [2023-11-17 12:31:25,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:31:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:31:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:31:25,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:25,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 725 flow. Second operand has 13 states, 13 states have (on average 16.076923076923077) internal successors, (209), 13 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:25,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:25,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:25,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:25,757 INFO L124 PetriNetUnfolderBase]: 1880/2932 cut-off events. [2023-11-17 12:31:25,758 INFO L125 PetriNetUnfolderBase]: For 13840/13840 co-relation queries the response was YES. [2023-11-17 12:31:25,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14140 conditions, 2932 events. 1880/2932 cut-off events. For 13840/13840 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13712 event pairs, 568 based on Foata normal form. 18/2694 useless extension candidates. Maximal degree in co-relation 14114. Up to 2592 conditions per place. [2023-11-17 12:31:25,780 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 7 changer transitions 37/121 dead transitions. [2023-11-17 12:31:25,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 121 transitions, 1153 flow [2023-11-17 12:31:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:31:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:31:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2023-11-17 12:31:25,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390151515151515 [2023-11-17 12:31:25,782 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 179 transitions. [2023-11-17 12:31:25,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 179 transitions. [2023-11-17 12:31:25,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:25,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 179 transitions. [2023-11-17 12:31:25,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:25,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:25,784 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 725 flow. Second operand 8 states and 179 transitions. [2023-11-17 12:31:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 121 transitions, 1153 flow [2023-11-17 12:31:25,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 1115 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-17 12:31:25,811 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 682 flow [2023-11-17 12:31:25,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=682, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2023-11-17 12:31:25,812 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-11-17 12:31:25,812 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 682 flow [2023-11-17 12:31:25,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.076923076923077) internal successors, (209), 13 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:25,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:25,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:25,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:26,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 12:31:26,018 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:26,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1514559686, now seen corresponding path program 2 times [2023-11-17 12:31:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961039341] [2023-11-17 12:31:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:26,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:31:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961039341] [2023-11-17 12:31:26,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961039341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:26,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:26,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:31:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831657700] [2023-11-17 12:31:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:31:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:31:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:31:26,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:26,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 682 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:26,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:26,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:26,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:26,730 INFO L124 PetriNetUnfolderBase]: 3002/4567 cut-off events. [2023-11-17 12:31:26,731 INFO L125 PetriNetUnfolderBase]: For 22411/22411 co-relation queries the response was YES. [2023-11-17 12:31:26,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22278 conditions, 4567 events. 3002/4567 cut-off events. For 22411/22411 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 22641 event pairs, 504 based on Foata normal form. 107/4155 useless extension candidates. Maximal degree in co-relation 22249. Up to 2429 conditions per place. [2023-11-17 12:31:26,761 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 116 selfloop transitions, 23 changer transitions 5/144 dead transitions. [2023-11-17 12:31:26,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 144 transitions, 1489 flow [2023-11-17 12:31:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:31:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:31:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-17 12:31:26,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2023-11-17 12:31:26,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-17 12:31:26,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-17 12:31:26,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:26,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-17 12:31:26,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:26,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:26,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:26,764 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 682 flow. Second operand 4 states and 119 transitions. [2023-11-17 12:31:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 144 transitions, 1489 flow [2023-11-17 12:31:26,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 144 transitions, 1465 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-17 12:31:26,792 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 848 flow [2023-11-17 12:31:26,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=848, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-11-17 12:31:26,793 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 54 predicate places. [2023-11-17 12:31:26,793 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 848 flow [2023-11-17 12:31:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:26,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:26,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:26,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:31:26,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:26,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash 624159806, now seen corresponding path program 1 times [2023-11-17 12:31:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542926408] [2023-11-17 12:31:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542926408] [2023-11-17 12:31:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542926408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230047040] [2023-11-17 12:31:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:26,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:26,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:26,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:26,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:31:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:27,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:31:27,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:27,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230047040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:27,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:31:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758272390] [2023-11-17 12:31:27,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:31:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:31:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:31:27,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-17 12:31:27,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 848 flow. Second operand has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:27,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:27,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-17 12:31:27,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:28,145 INFO L124 PetriNetUnfolderBase]: 4531/6873 cut-off events. [2023-11-17 12:31:28,145 INFO L125 PetriNetUnfolderBase]: For 41230/41230 co-relation queries the response was YES. [2023-11-17 12:31:28,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36856 conditions, 6873 events. 4531/6873 cut-off events. For 41230/41230 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 35518 event pairs, 2139 based on Foata normal form. 168/6195 useless extension candidates. Maximal degree in co-relation 36827. Up to 4401 conditions per place. [2023-11-17 12:31:28,189 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 80 selfloop transitions, 4 changer transitions 70/154 dead transitions. [2023-11-17 12:31:28,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 154 transitions, 1896 flow [2023-11-17 12:31:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:31:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:31:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2023-11-17 12:31:28,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2023-11-17 12:31:28,191 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 136 transitions. [2023-11-17 12:31:28,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 136 transitions. [2023-11-17 12:31:28,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:28,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 136 transitions. [2023-11-17 12:31:28,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:28,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:28,192 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:28,192 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 848 flow. Second operand 6 states and 136 transitions. [2023-11-17 12:31:28,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 154 transitions, 1896 flow [2023-11-17 12:31:28,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 154 transitions, 1796 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:28,249 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 840 flow [2023-11-17 12:31:28,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=840, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-11-17 12:31:28,250 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-11-17 12:31:28,250 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 840 flow [2023-11-17 12:31:28,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:28,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:28,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:28,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:28,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 38107981, now seen corresponding path program 2 times [2023-11-17 12:31:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449199161] [2023-11-17 12:31:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:29,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:29,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449199161] [2023-11-17 12:31:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449199161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:29,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662787755] [2023-11-17 12:31:29,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:31:29,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:29,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:29,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:29,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:31:29,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:31:29,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:29,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:31:29,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:30,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:30,214 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:31:30,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-17 12:31:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662787755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:30,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-11-17 12:31:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599069441] [2023-11-17 12:31:30,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:31:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:31:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:31:30,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:30,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 840 flow. Second operand has 29 states, 29 states have (on average 12.655172413793103) internal successors, (367), 29 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:30,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:30,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:30,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:33,821 INFO L124 PetriNetUnfolderBase]: 9779/14703 cut-off events. [2023-11-17 12:31:33,822 INFO L125 PetriNetUnfolderBase]: For 74055/74055 co-relation queries the response was YES. [2023-11-17 12:31:33,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74188 conditions, 14703 events. 9779/14703 cut-off events. For 74055/74055 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 85913 event pairs, 1444 based on Foata normal form. 706/13738 useless extension candidates. Maximal degree in co-relation 74156. Up to 3687 conditions per place. [2023-11-17 12:31:34,023 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 412 selfloop transitions, 114 changer transitions 2/528 dead transitions. [2023-11-17 12:31:34,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 528 transitions, 5428 flow [2023-11-17 12:31:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:31:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:31:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 719 transitions. [2023-11-17 12:31:34,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29443079443079445 [2023-11-17 12:31:34,029 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 719 transitions. [2023-11-17 12:31:34,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 719 transitions. [2023-11-17 12:31:34,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:34,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 719 transitions. [2023-11-17 12:31:34,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 19.43243243243243) internal successors, (719), 37 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:34,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:34,035 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:34,035 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 840 flow. Second operand 37 states and 719 transitions. [2023-11-17 12:31:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 528 transitions, 5428 flow [2023-11-17 12:31:34,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 528 transitions, 5350 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-11-17 12:31:34,200 INFO L231 Difference]: Finished difference. Result has 134 places, 201 transitions, 2433 flow [2023-11-17 12:31:34,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2433, PETRI_PLACES=134, PETRI_TRANSITIONS=201} [2023-11-17 12:31:34,201 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-11-17 12:31:34,201 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 201 transitions, 2433 flow [2023-11-17 12:31:34,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.655172413793103) internal successors, (367), 29 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:34,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:34,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:34,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:34,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:34,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1347037419, now seen corresponding path program 3 times [2023-11-17 12:31:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:34,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225483833] [2023-11-17 12:31:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:34,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225483833] [2023-11-17 12:31:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225483833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:36,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103580404] [2023-11-17 12:31:36,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:31:36,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:36,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:36,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:31:36,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:31:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:36,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:31:36,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:36,600 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 12:31:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:36,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:36,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:31:36,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-17 12:31:36,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 12:31:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:31:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103580404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:37,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:37,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 9] total 31 [2023-11-17 12:31:37,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363285789] [2023-11-17 12:31:37,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:31:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:37,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:31:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:31:37,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:37,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 201 transitions, 2433 flow. Second operand has 32 states, 32 states have (on average 12.40625) internal successors, (397), 32 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:37,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:37,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:37,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:42,866 INFO L124 PetriNetUnfolderBase]: 15960/23818 cut-off events. [2023-11-17 12:31:42,867 INFO L125 PetriNetUnfolderBase]: For 182928/182928 co-relation queries the response was YES. [2023-11-17 12:31:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134950 conditions, 23818 events. 15960/23818 cut-off events. For 182928/182928 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 146370 event pairs, 2511 based on Foata normal form. 764/21942 useless extension candidates. Maximal degree in co-relation 134908. Up to 5774 conditions per place. [2023-11-17 12:31:43,057 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 488 selfloop transitions, 225 changer transitions 32/745 dead transitions. [2023-11-17 12:31:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 745 transitions, 9452 flow [2023-11-17 12:31:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:31:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:31:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 717 transitions. [2023-11-17 12:31:43,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28588516746411485 [2023-11-17 12:31:43,060 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 717 transitions. [2023-11-17 12:31:43,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 717 transitions. [2023-11-17 12:31:43,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:43,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 717 transitions. [2023-11-17 12:31:43,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 18.86842105263158) internal successors, (717), 38 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,070 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,070 INFO L175 Difference]: Start difference. First operand has 134 places, 201 transitions, 2433 flow. Second operand 38 states and 717 transitions. [2023-11-17 12:31:43,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 745 transitions, 9452 flow [2023-11-17 12:31:44,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 745 transitions, 8912 flow, removed 258 selfloop flow, removed 8 redundant places. [2023-11-17 12:31:44,095 INFO L231 Difference]: Finished difference. Result has 172 places, 346 transitions, 4689 flow [2023-11-17 12:31:44,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4689, PETRI_PLACES=172, PETRI_TRANSITIONS=346} [2023-11-17 12:31:44,096 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 140 predicate places. [2023-11-17 12:31:44,096 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 346 transitions, 4689 flow [2023-11-17 12:31:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 12.40625) internal successors, (397), 32 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:44,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:44,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:44,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:31:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:31:44,297 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:31:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1657764782, now seen corresponding path program 4 times [2023-11-17 12:31:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024918064] [2023-11-17 12:31:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:46,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024918064] [2023-11-17 12:31:46,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024918064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:46,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929140836] [2023-11-17 12:31:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:31:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:46,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:46,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:31:46,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:31:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:46,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:31:46,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:46,205 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 12:31:46,223 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-17 12:31:46,239 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 12:31:46,256 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,273 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 12:31:46,288 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,303 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,317 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,333 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 12:31:46,349 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,364 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 12:31:46,379 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-17 12:31:46,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 12:31:46,697 INFO L349 Elim1Store]: treesize reduction 4, result has 95.1 percent of original size [2023-11-17 12:31:46,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 102 [2023-11-17 12:31:47,275 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:31:47,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 29 [2023-11-17 12:31:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:31:47,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:47,406 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_528 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_528) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) 0))) is different from false [2023-11-17 12:31:47,474 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_528 (Array Int Int)) (~q2~0.offset Int)) (or (not (= (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_528) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 0)))) is different from false [2023-11-17 12:31:47,617 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 12:31:47,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 106 [2023-11-17 12:31:47,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 12:31:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-11-17 12:31:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929140836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:48,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 36 [2023-11-17 12:31:48,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058985929] [2023-11-17 12:31:48,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:31:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:48,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:31:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1082, Unknown=2, NotChecked=134, Total=1332 [2023-11-17 12:31:48,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-17 12:31:48,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 346 transitions, 4689 flow. Second operand has 37 states, 37 states have (on average 12.243243243243244) internal successors, (453), 37 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:48,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:48,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-17 12:31:48,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:54,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:31:57,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:03,034 INFO L124 PetriNetUnfolderBase]: 26893/39949 cut-off events. [2023-11-17 12:32:03,035 INFO L125 PetriNetUnfolderBase]: For 356000/356000 co-relation queries the response was YES. [2023-11-17 12:32:03,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234271 conditions, 39949 events. 26893/39949 cut-off events. For 356000/356000 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 266255 event pairs, 4983 based on Foata normal form. 288/35923 useless extension candidates. Maximal degree in co-relation 234222. Up to 22630 conditions per place. [2023-11-17 12:32:03,436 INFO L140 encePairwiseOnDemand]: 45/66 looper letters, 628 selfloop transitions, 359 changer transitions 0/987 dead transitions. [2023-11-17 12:32:03,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 987 transitions, 12450 flow [2023-11-17 12:32:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 12:32:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 12:32:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 974 transitions. [2023-11-17 12:32:03,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27844482561463696 [2023-11-17 12:32:03,441 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 974 transitions. [2023-11-17 12:32:03,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 974 transitions. [2023-11-17 12:32:03,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:03,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 974 transitions. [2023-11-17 12:32:03,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 18.37735849056604) internal successors, (974), 53 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:03,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 66.0) internal successors, (3564), 54 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:03,448 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 66.0) internal successors, (3564), 54 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:03,448 INFO L175 Difference]: Start difference. First operand has 172 places, 346 transitions, 4689 flow. Second operand 53 states and 974 transitions. [2023-11-17 12:32:03,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 987 transitions, 12450 flow [2023-11-17 12:32:09,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 987 transitions, 11638 flow, removed 310 selfloop flow, removed 14 redundant places. [2023-11-17 12:32:09,077 INFO L231 Difference]: Finished difference. Result has 235 places, 650 transitions, 8689 flow [2023-11-17 12:32:09,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8689, PETRI_PLACES=235, PETRI_TRANSITIONS=650} [2023-11-17 12:32:09,078 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 203 predicate places. [2023-11-17 12:32:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 650 transitions, 8689 flow [2023-11-17 12:32:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 12.243243243243244) internal successors, (453), 37 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:09,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:09,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:32:09,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:32:09,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2095319407, now seen corresponding path program 1 times [2023-11-17 12:32:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:09,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14086774] [2023-11-17 12:32:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14086774] [2023-11-17 12:32:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14086774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335678858] [2023-11-17 12:32:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:10,878 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:10,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:32:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:11,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 12:32:11,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:11,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:12,062 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 12:32:12,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 89 [2023-11-17 12:32:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:32:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335678858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:12,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:12,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 36 [2023-11-17 12:32:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462037784] [2023-11-17 12:32:12,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:12,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 12:32:12,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 12:32:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 12:32:12,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 66 [2023-11-17 12:32:12,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 650 transitions, 8689 flow. Second operand has 38 states, 38 states have (on average 10.289473684210526) internal successors, (391), 38 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:12,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:12,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 66 [2023-11-17 12:32:12,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:15,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:17,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:19,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:21,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:23,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:25,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:27,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:30,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:32,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:34,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:36,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:38,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:40,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:41,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:44,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:46,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:48,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:32:50,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:52,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:54,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:56,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:32:58,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:00,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:02,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:13,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:15,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:17,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:19,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:21,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:23,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:26,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:28,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:30,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:32,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:34,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:36,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:38,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:40,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:42,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:44,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:46,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:48,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:50,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:53,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:55,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:57,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:33:59,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:01,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:03,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:05,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:07,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:09,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:11,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:14,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:16,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:18,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:20,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:22,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:24,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:26,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:28,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:30,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:34:40,477 INFO L124 PetriNetUnfolderBase]: 33664/50991 cut-off events. [2023-11-17 12:34:40,478 INFO L125 PetriNetUnfolderBase]: For 981711/981711 co-relation queries the response was YES. [2023-11-17 12:34:41,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441376 conditions, 50991 events. 33664/50991 cut-off events. For 981711/981711 co-relation queries the response was YES. Maximal size of possible extension queue 1868. Compared 367177 event pairs, 6440 based on Foata normal form. 25/50048 useless extension candidates. Maximal degree in co-relation 441301. Up to 40123 conditions per place. [2023-11-17 12:34:41,484 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 1012 selfloop transitions, 434 changer transitions 40/1486 dead transitions. [2023-11-17 12:34:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1486 transitions, 22791 flow [2023-11-17 12:34:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 12:34:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 12:34:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 759 transitions. [2023-11-17 12:34:41,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24468085106382978 [2023-11-17 12:34:41,487 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 759 transitions. [2023-11-17 12:34:41,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 759 transitions. [2023-11-17 12:34:41,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:41,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 759 transitions. [2023-11-17 12:34:41,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 16.148936170212767) internal successors, (759), 47 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:41,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 66.0) internal successors, (3168), 48 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:41,494 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 66.0) internal successors, (3168), 48 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:41,494 INFO L175 Difference]: Start difference. First operand has 235 places, 650 transitions, 8689 flow. Second operand 47 states and 759 transitions. [2023-11-17 12:34:41,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1486 transitions, 22791 flow [2023-11-17 12:34:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1486 transitions, 21866 flow, removed 413 selfloop flow, removed 13 redundant places. [2023-11-17 12:34:50,969 INFO L231 Difference]: Finished difference. Result has 286 places, 1025 transitions, 14800 flow [2023-11-17 12:34:50,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8168, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=14800, PETRI_PLACES=286, PETRI_TRANSITIONS=1025} [2023-11-17 12:34:50,970 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 254 predicate places. [2023-11-17 12:34:50,970 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1025 transitions, 14800 flow [2023-11-17 12:34:50,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.289473684210526) internal successors, (391), 38 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:50,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:50,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:34:51,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:51,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1015829675, now seen corresponding path program 2 times [2023-11-17 12:34:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851275206] [2023-11-17 12:34:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:52,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:52,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851275206] [2023-11-17 12:34:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851275206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456869669] [2023-11-17 12:34:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:34:52,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:52,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:34:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:34:52,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:52,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 12:34:52,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:53,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:54,168 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 12:34:54,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 89 [2023-11-17 12:34:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456869669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:55,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 43 [2023-11-17 12:34:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903228512] [2023-11-17 12:34:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 12:34:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 12:34:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2023-11-17 12:34:55,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 66 [2023-11-17 12:34:55,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1025 transitions, 14800 flow. Second operand has 45 states, 45 states have (on average 9.911111111111111) internal successors, (446), 45 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:55,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:55,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 66 [2023-11-17 12:34:55,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:35:42,471 INFO L124 PetriNetUnfolderBase]: 63795/96907 cut-off events. [2023-11-17 12:35:42,471 INFO L125 PetriNetUnfolderBase]: For 2124480/2124480 co-relation queries the response was YES. [2023-11-17 12:35:43,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884237 conditions, 96907 events. 63795/96907 cut-off events. For 2124480/2124480 co-relation queries the response was YES. Maximal size of possible extension queue 3442. Compared 760515 event pairs, 6651 based on Foata normal form. 73/95459 useless extension candidates. Maximal degree in co-relation 884147. Up to 44000 conditions per place. [2023-11-17 12:35:44,305 INFO L140 encePairwiseOnDemand]: 48/66 looper letters, 1554 selfloop transitions, 1436 changer transitions 167/3157 dead transitions. [2023-11-17 12:35:44,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 3157 transitions, 51840 flow [2023-11-17 12:35:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-17 12:35:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-17 12:35:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 1969 transitions. [2023-11-17 12:35:44,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24453551912568305 [2023-11-17 12:35:44,310 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 1969 transitions. [2023-11-17 12:35:44,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 1969 transitions. [2023-11-17 12:35:44,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:35:44,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 1969 transitions. [2023-11-17 12:35:44,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 16.139344262295083) internal successors, (1969), 122 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:44,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 66.0) internal successors, (8118), 123 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:44,324 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 66.0) internal successors, (8118), 123 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:44,324 INFO L175 Difference]: Start difference. First operand has 286 places, 1025 transitions, 14800 flow. Second operand 122 states and 1969 transitions. [2023-11-17 12:35:44,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 3157 transitions, 51840 flow [2023-11-17 12:36:18,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 3157 transitions, 51294 flow, removed 259 selfloop flow, removed 8 redundant places. [2023-11-17 12:36:18,848 INFO L231 Difference]: Finished difference. Result has 430 places, 2245 transitions, 38062 flow [2023-11-17 12:36:18,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14430, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=38062, PETRI_PLACES=430, PETRI_TRANSITIONS=2245} [2023-11-17 12:36:18,850 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 398 predicate places. [2023-11-17 12:36:18,850 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 2245 transitions, 38062 flow [2023-11-17 12:36:18,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 9.911111111111111) internal successors, (446), 45 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:18,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:36:18,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:36:18,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:36:19,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:36:19,064 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:36:19,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:36:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash 124009283, now seen corresponding path program 3 times [2023-11-17 12:36:19,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:36:19,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190266603] [2023-11-17 12:36:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:36:19,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:36:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:36:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:36:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190266603] [2023-11-17 12:36:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190266603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:36:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116069461] [2023-11-17 12:36:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:36:20,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:36:20,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:36:20,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:36:20,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:36:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:36:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:36:20,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 12:36:20,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:36:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:36:21,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:36:21,698 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 12:36:21,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 89 [2023-11-17 12:36:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:36:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116069461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:36:22,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:36:22,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 40 [2023-11-17 12:36:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427900297] [2023-11-17 12:36:22,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:36:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:36:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:36:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:36:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:36:22,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 66 [2023-11-17 12:36:22,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 2245 transitions, 38062 flow. Second operand has 42 states, 42 states have (on average 10.071428571428571) internal successors, (423), 42 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:22,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:36:22,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 66 [2023-11-17 12:36:22,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand