/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-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:33:38,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:33:38,323 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 12:33:38,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:33:38,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:33:38,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:33:38,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:33:38,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:33:38,357 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:33:38,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:33:38,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:33:38,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:33:38,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:33:38,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:33:38,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:33:38,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:33:38,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:33:38,363 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:33:38,364 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:33:38,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:33:38,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:33:38,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:33:38,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:33:38,365 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:33:38,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:33:38,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:33:38,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:33:38,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:33:38,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:33:38,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:33:38,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:33:38,367 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:33:38,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:33:38,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:33:38,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:33:38,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:33:38,617 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:33:38,617 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:33:38,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-11-17 12:33:39,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:33:40,016 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:33:40,017 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-11-17 12:33:40,025 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e071bd49/4e84f11b153d47a69920d94f730ab687/FLAG97c84d702 [2023-11-17 12:33:40,046 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e071bd49/4e84f11b153d47a69920d94f730ab687 [2023-11-17 12:33:40,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:33:40,049 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:33:40,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:33:40,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:33:40,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:33:40,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@818c358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40, skipping insertion in model container [2023-11-17 12:33:40,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:33:40,223 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-simple-array-sum.wvr.c[2729,2742] [2023-11-17 12:33:40,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:33:40,240 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:33:40,267 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-simple-array-sum.wvr.c[2729,2742] [2023-11-17 12:33:40,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:33:40,278 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:33:40,278 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:33:40,284 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:33:40,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40 WrapperNode [2023-11-17 12:33:40,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:33:40,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:33:40,286 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:33:40,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:33:40,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,301 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,324 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2023-11-17 12:33:40,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:33:40,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:33:40,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:33:40,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:33:40,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:33:40,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:33:40,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:33:40,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:33:40,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (1/1) ... [2023-11-17 12:33:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:33:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:40,399 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 12:33:40,408 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 12:33:40,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:33:40,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:33:40,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:33:40,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:33:40,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:33:40,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:33:40,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:33:40,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:33:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:33:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:33:40,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:33:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:33:40,430 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 12:33:40,515 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:33:40,517 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:33:40,796 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:33:41,092 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:33:41,093 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 12:33:41,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:33:41 BoogieIcfgContainer [2023-11-17 12:33:41,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:33:41,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:33:41,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:33:41,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:33:41,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:33:40" (1/3) ... [2023-11-17 12:33:41,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb830f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:33:41, skipping insertion in model container [2023-11-17 12:33:41,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:33:40" (2/3) ... [2023-11-17 12:33:41,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb830f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:33:41, skipping insertion in model container [2023-11-17 12:33:41,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:33:41" (3/3) ... [2023-11-17 12:33:41,103 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-17 12:33:41,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:33:41,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:33:41,120 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:33:41,203 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:33:41,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 101 flow [2023-11-17 12:33:41,287 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2023-11-17 12:33:41,287 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:33:41,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 6/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 12:33:41,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 101 flow [2023-11-17 12:33:41,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 36 transitions, 90 flow [2023-11-17 12:33:41,306 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:33:41,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 36 transitions, 90 flow [2023-11-17 12:33:41,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 36 transitions, 90 flow [2023-11-17 12:33:41,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 36 transitions, 90 flow [2023-11-17 12:33:41,331 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-17 12:33:41,331 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:33:41,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 6/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 12:33:41,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 378 [2023-11-17 12:33:41,632 INFO L134 LiptonReduction]: Checked pairs total: 793 [2023-11-17 12:33:41,633 INFO L136 LiptonReduction]: Total number of compositions: 10 [2023-11-17 12:33:41,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:33:41,652 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;@5633f8b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:33:41,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:33:41,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:33:41,670 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-17 12:33:41,670 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:33:41,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:41,671 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 12:33:41,671 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 12:33:41,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1969273085, now seen corresponding path program 1 times [2023-11-17 12:33:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:41,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663420364] [2023-11-17 12:33:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:42,587 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 12:33:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663420364] [2023-11-17 12:33:42,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663420364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:33:42,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:33:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:33:42,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508922230] [2023-11-17 12:33:42,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:33:42,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:33:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:33:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:42,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:42,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:42,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:42,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:42,913 INFO L124 PetriNetUnfolderBase]: 805/1146 cut-off events. [2023-11-17 12:33:42,913 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-17 12:33:42,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 1146 events. 805/1146 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3739 event pairs, 506 based on Foata normal form. 1/847 useless extension candidates. Maximal degree in co-relation 918. Up to 651 conditions per place. [2023-11-17 12:33:42,926 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 49 selfloop transitions, 6 changer transitions 1/56 dead transitions. [2023-11-17 12:33:42,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 260 flow [2023-11-17 12:33:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:33:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:33:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2023-11-17 12:33:42,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408 [2023-11-17 12:33:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2023-11-17 12:33:42,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2023-11-17 12:33:42,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:42,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2023-11-17 12:33:42,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:42,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:42,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:42,953 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 5 states and 102 transitions. [2023-11-17 12:33:42,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 260 flow [2023-11-17 12:33:42,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:33:42,963 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 106 flow [2023-11-17 12:33:42,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-17 12:33:42,968 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-11-17 12:33:42,969 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 106 flow [2023-11-17 12:33:42,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:42,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:42,969 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 12:33:42,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:33:42,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:33:42,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1226450230, now seen corresponding path program 1 times [2023-11-17 12:33:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634227821] [2023-11-17 12:33:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:43,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:43,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634227821] [2023-11-17 12:33:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634227821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275799237] [2023-11-17 12:33:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:43,157 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 12:33:43,181 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 12:33:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:43,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:43,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:43,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275799237] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:43,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:33:43,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-11-17 12:33:43,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290502967] [2023-11-17 12:33:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:43,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:33:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:33:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:33:43,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:43,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:43,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:43,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:43,776 INFO L124 PetriNetUnfolderBase]: 1568/2229 cut-off events. [2023-11-17 12:33:43,776 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-11-17 12:33:43,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 2229 events. 1568/2229 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8513 event pairs, 1003 based on Foata normal form. 1/1809 useless extension candidates. Maximal degree in co-relation 4650. Up to 1145 conditions per place. [2023-11-17 12:33:43,789 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2023-11-17 12:33:43,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 63 transitions, 312 flow [2023-11-17 12:33:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:33:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:33:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2023-11-17 12:33:43,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416 [2023-11-17 12:33:43,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2023-11-17 12:33:43,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2023-11-17 12:33:43,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:43,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2023-11-17 12:33:43,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,809 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 106 flow. Second operand 5 states and 104 transitions. [2023-11-17 12:33:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 63 transitions, 312 flow [2023-11-17 12:33:43,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 304 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:33:43,812 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 134 flow [2023-11-17 12:33:43,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-11-17 12:33:43,813 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-17 12:33:43,813 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 134 flow [2023-11-17 12:33:43,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:43,813 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 12:33:43,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:33:44,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:44,020 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 12:33:44,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -411435405, now seen corresponding path program 1 times [2023-11-17 12:33:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:44,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836579717] [2023-11-17 12:33:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836579717] [2023-11-17 12:33:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836579717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:33:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:33:44,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:33:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608241787] [2023-11-17 12:33:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:33:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:33:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:33:44,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:44,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:44,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:44,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:44,383 INFO L124 PetriNetUnfolderBase]: 1006/1452 cut-off events. [2023-11-17 12:33:44,384 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-17 12:33:44,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 1452 events. 1006/1452 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5271 event pairs, 558 based on Foata normal form. 67/1215 useless extension candidates. Maximal degree in co-relation 1854. Up to 635 conditions per place. [2023-11-17 12:33:44,393 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 64 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-11-17 12:33:44,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 353 flow [2023-11-17 12:33:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:33:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:33:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2023-11-17 12:33:44,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-17 12:33:44,397 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 126 transitions. [2023-11-17 12:33:44,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 126 transitions. [2023-11-17 12:33:44,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:44,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 126 transitions. [2023-11-17 12:33:44,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,402 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 134 flow. Second operand 6 states and 126 transitions. [2023-11-17 12:33:44,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 353 flow [2023-11-17 12:33:44,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 72 transitions, 343 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 12:33:44,407 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 138 flow [2023-11-17 12:33:44,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-17 12:33:44,408 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-17 12:33:44,408 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 138 flow [2023-11-17 12:33:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:44,409 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 12:33:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:33:44,409 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 12:33:44,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 307555248, now seen corresponding path program 1 times [2023-11-17 12:33:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:44,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034486420] [2023-11-17 12:33:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:44,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:44,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:44,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034486420] [2023-11-17 12:33:44,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034486420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:33:44,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:33:44,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:33:44,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563960565] [2023-11-17 12:33:44,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:33:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:33:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:33:44,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:44,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:44,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:44,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:44,777 INFO L124 PetriNetUnfolderBase]: 624/932 cut-off events. [2023-11-17 12:33:44,778 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2023-11-17 12:33:44,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 932 events. 624/932 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3186 event pairs, 320 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 1368. Up to 575 conditions per place. [2023-11-17 12:33:44,784 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 27 selfloop transitions, 4 changer transitions 32/63 dead transitions. [2023-11-17 12:33:44,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 63 transitions, 332 flow [2023-11-17 12:33:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:33:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:33:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2023-11-17 12:33:44,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2023-11-17 12:33:44,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 113 transitions. [2023-11-17 12:33:44,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 113 transitions. [2023-11-17 12:33:44,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:44,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 113 transitions. [2023-11-17 12:33:44,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,789 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 138 flow. Second operand 6 states and 113 transitions. [2023-11-17 12:33:44,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 63 transitions, 332 flow [2023-11-17 12:33:44,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 321 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 12:33:44,793 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 111 flow [2023-11-17 12:33:44,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2023-11-17 12:33:44,795 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-11-17 12:33:44,795 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 111 flow [2023-11-17 12:33:44,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:44,796 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 12:33:44,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:33:44,796 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 12:33:44,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash -414255066, now seen corresponding path program 1 times [2023-11-17 12:33:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:44,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65354467] [2023-11-17 12:33:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:33:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65354467] [2023-11-17 12:33:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65354467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96360971] [2023-11-17 12:33:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:44,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:44,945 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 12:33:44,971 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 12:33:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:45,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:33:45,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:33:45,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:33:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96360971] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:45,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:33:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-17 12:33:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862085439] [2023-11-17 12:33:45,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:33:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:33:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:33:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:45,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:45,258 INFO L124 PetriNetUnfolderBase]: 509/724 cut-off events. [2023-11-17 12:33:45,259 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2023-11-17 12:33:45,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 724 events. 509/724 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2154 event pairs, 253 based on Foata normal form. 42/676 useless extension candidates. Maximal degree in co-relation 1887. Up to 575 conditions per place. [2023-11-17 12:33:45,264 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-17 12:33:45,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 247 flow [2023-11-17 12:33:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:33:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:33:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2023-11-17 12:33:45,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.364 [2023-11-17 12:33:45,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 91 transitions. [2023-11-17 12:33:45,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 91 transitions. [2023-11-17 12:33:45,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:45,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 91 transitions. [2023-11-17 12:33:45,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,267 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 111 flow. Second operand 5 states and 91 transitions. [2023-11-17 12:33:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 247 flow [2023-11-17 12:33:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 215 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-17 12:33:45,270 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-11-17 12:33:45,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-17 12:33:45,271 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-11-17 12:33:45,271 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-11-17 12:33:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:45,272 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 12:33:45,285 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 12:33:45,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:45,478 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 12:33:45,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -125943672, now seen corresponding path program 1 times [2023-11-17 12:33:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199206479] [2023-11-17 12:33:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:45,615 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 12:33:45,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:45,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199206479] [2023-11-17 12:33:45,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199206479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72853949] [2023-11-17 12:33:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:45,617 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 12:33:45,635 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 12:33:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:45,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:33:45,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:45,790 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 12:33:45,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:45,830 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 12:33:45,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72853949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:45,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:45,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-17 12:33:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491077249] [2023-11-17 12:33:45,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:45,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:33:45,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:33:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:33:45,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:45,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:45,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:45,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:46,083 INFO L124 PetriNetUnfolderBase]: 753/1064 cut-off events. [2023-11-17 12:33:46,084 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2023-11-17 12:33:46,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 1064 events. 753/1064 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3544 event pairs, 241 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 2648. Up to 548 conditions per place. [2023-11-17 12:33:46,091 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-11-17 12:33:46,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 325 flow [2023-11-17 12:33:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:33:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:33:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2023-11-17 12:33:46,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31 [2023-11-17 12:33:46,092 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 124 transitions. [2023-11-17 12:33:46,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 124 transitions. [2023-11-17 12:33:46,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:46,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 124 transitions. [2023-11-17 12:33:46,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:46,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:46,094 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:46,094 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 8 states and 124 transitions. [2023-11-17 12:33:46,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 325 flow [2023-11-17 12:33:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 309 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:33:46,096 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 130 flow [2023-11-17 12:33:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-17 12:33:46,097 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-11-17 12:33:46,097 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 130 flow [2023-11-17 12:33:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:46,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:46,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:46,107 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 12:33:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:46,304 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 12:33:46,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1146182452, now seen corresponding path program 1 times [2023-11-17 12:33:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989557257] [2023-11-17 12:33:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989557257] [2023-11-17 12:33:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989557257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486369671] [2023-11-17 12:33:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:46,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:46,470 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 12:33:46,500 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 12:33:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:46,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:33:46,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:46,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486369671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:46,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-17 12:33:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761732239] [2023-11-17 12:33:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:46,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:33:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:33:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:33:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:46,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 130 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 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 12:33:46,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:46,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:46,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:47,040 INFO L124 PetriNetUnfolderBase]: 1315/1812 cut-off events. [2023-11-17 12:33:47,040 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2023-11-17 12:33:47,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4991 conditions, 1812 events. 1315/1812 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6199 event pairs, 393 based on Foata normal form. 0/1564 useless extension candidates. Maximal degree in co-relation 4966. Up to 788 conditions per place. [2023-11-17 12:33:47,050 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 59 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2023-11-17 12:33:47,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 400 flow [2023-11-17 12:33:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:33:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:33:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2023-11-17 12:33:47,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315 [2023-11-17 12:33:47,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 126 transitions. [2023-11-17 12:33:47,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 126 transitions. [2023-11-17 12:33:47,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:47,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 126 transitions. [2023-11-17 12:33:47,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,053 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,054 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 130 flow. Second operand 8 states and 126 transitions. [2023-11-17 12:33:47,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 400 flow [2023-11-17 12:33:47,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 391 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 12:33:47,056 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 168 flow [2023-11-17 12:33:47,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-11-17 12:33:47,057 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2023-11-17 12:33:47,057 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 168 flow [2023-11-17 12:33:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 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 12:33:47,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:47,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:47,066 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 12:33:47,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:47,266 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 12:33:47,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash 478347093, now seen corresponding path program 1 times [2023-11-17 12:33:47,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:47,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208395301] [2023-11-17 12:33:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:47,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208395301] [2023-11-17 12:33:47,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208395301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:33:47,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:33:47,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:33:47,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994562627] [2023-11-17 12:33:47,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:33:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:33:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:33:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:33:47,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:33:47,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:47,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:33:47,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:47,725 INFO L124 PetriNetUnfolderBase]: 1061/1496 cut-off events. [2023-11-17 12:33:47,725 INFO L125 PetriNetUnfolderBase]: For 1345/1345 co-relation queries the response was YES. [2023-11-17 12:33:47,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1496 events. 1061/1496 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4824 event pairs, 203 based on Foata normal form. 0/1400 useless extension candidates. Maximal degree in co-relation 4786. Up to 941 conditions per place. [2023-11-17 12:33:47,735 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 71 selfloop transitions, 9 changer transitions 6/86 dead transitions. [2023-11-17 12:33:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 524 flow [2023-11-17 12:33:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:33:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:33:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2023-11-17 12:33:47,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:33:47,736 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 120 transitions. [2023-11-17 12:33:47,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 120 transitions. [2023-11-17 12:33:47,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:47,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 120 transitions. [2023-11-17 12:33:47,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,738 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,738 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 168 flow. Second operand 6 states and 120 transitions. [2023-11-17 12:33:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 524 flow [2023-11-17 12:33:47,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:33:47,743 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 226 flow [2023-11-17 12:33:47,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-11-17 12:33:47,744 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-11-17 12:33:47,744 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 226 flow [2023-11-17 12:33:47,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:47,745 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, 1, 1] [2023-11-17 12:33:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:33:47,745 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 12:33:47,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash -575448513, now seen corresponding path program 2 times [2023-11-17 12:33:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187129130] [2023-11-17 12:33:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:47,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:47,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187129130] [2023-11-17 12:33:47,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187129130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:47,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878882073] [2023-11-17 12:33:47,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:33:47,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:47,876 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 12:33:47,893 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 12:33:48,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:33:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:48,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:48,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:48,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:33:48,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878882073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:48,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:33:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407048947] [2023-11-17 12:33:48,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:33:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:48,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:33:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:33:48,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:48,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 226 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:48,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:48,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:48,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:48,503 INFO L124 PetriNetUnfolderBase]: 1368/1960 cut-off events. [2023-11-17 12:33:48,504 INFO L125 PetriNetUnfolderBase]: For 3276/3276 co-relation queries the response was YES. [2023-11-17 12:33:48,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6802 conditions, 1960 events. 1368/1960 cut-off events. For 3276/3276 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6669 event pairs, 730 based on Foata normal form. 28/1956 useless extension candidates. Maximal degree in co-relation 5301. Up to 1495 conditions per place. [2023-11-17 12:33:48,517 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 39 selfloop transitions, 6 changer transitions 49/94 dead transitions. [2023-11-17 12:33:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 636 flow [2023-11-17 12:33:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:33:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:33:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2023-11-17 12:33:48,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 12:33:48,519 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 150 transitions. [2023-11-17 12:33:48,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 150 transitions. [2023-11-17 12:33:48,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:48,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 150 transitions. [2023-11-17 12:33:48,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:48,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:48,521 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:48,521 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 226 flow. Second operand 9 states and 150 transitions. [2023-11-17 12:33:48,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 636 flow [2023-11-17 12:33:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 628 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:33:48,535 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 266 flow [2023-11-17 12:33:48,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2023-11-17 12:33:48,536 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 32 predicate places. [2023-11-17 12:33:48,536 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 266 flow [2023-11-17 12:33:48,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:48,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:48,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 12:33:48,544 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 12:33:48,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:48,744 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 12:33:48,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 347806790, now seen corresponding path program 3 times [2023-11-17 12:33:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:48,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265243946] [2023-11-17 12:33:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:48,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265243946] [2023-11-17 12:33:48,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265243946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775319524] [2023-11-17 12:33:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:33:48,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:48,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:48,916 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 12:33:48,934 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 12:33:49,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:33:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:49,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:49,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:49,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775319524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:49,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-17 12:33:49,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571171210] [2023-11-17 12:33:49,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:33:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:33:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:33:49,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:49,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 266 flow. Second operand has 15 states, 15 states have (on average 12.0) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:49,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:49,561 INFO L124 PetriNetUnfolderBase]: 1282/1805 cut-off events. [2023-11-17 12:33:49,561 INFO L125 PetriNetUnfolderBase]: For 3772/3772 co-relation queries the response was YES. [2023-11-17 12:33:49,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6681 conditions, 1805 events. 1282/1805 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6290 event pairs, 494 based on Foata normal form. 86/1853 useless extension candidates. Maximal degree in co-relation 6638. Up to 1183 conditions per place. [2023-11-17 12:33:49,576 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 87 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-11-17 12:33:49,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 790 flow [2023-11-17 12:33:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:33:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:33:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2023-11-17 12:33:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2023-11-17 12:33:49,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 144 transitions. [2023-11-17 12:33:49,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 144 transitions. [2023-11-17 12:33:49,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:49,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 144 transitions. [2023-11-17 12:33:49,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:49,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:49,580 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:49,580 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 266 flow. Second operand 9 states and 144 transitions. [2023-11-17 12:33:49,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 790 flow [2023-11-17 12:33:49,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 744 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-17 12:33:49,587 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 274 flow [2023-11-17 12:33:49,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=274, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-11-17 12:33:49,588 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 31 predicate places. [2023-11-17 12:33:49,589 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 274 flow [2023-11-17 12:33:49,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.0) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:49,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:49,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 12:33:49,598 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 12:33:49,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:49,796 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 12:33:49,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2086594958, now seen corresponding path program 4 times [2023-11-17 12:33:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579395122] [2023-11-17 12:33:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579395122] [2023-11-17 12:33:49,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579395122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709737982] [2023-11-17 12:33:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:33:49,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:49,988 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 12:33:50,007 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 12:33:50,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:33:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:50,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:33:50,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:50,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709737982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:50,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:50,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:33:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684596600] [2023-11-17 12:33:50,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:50,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:33:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:33:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:33:50,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:50,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 274 flow. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:50,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:50,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:50,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:50,883 INFO L124 PetriNetUnfolderBase]: 1625/2262 cut-off events. [2023-11-17 12:33:50,883 INFO L125 PetriNetUnfolderBase]: For 4282/4282 co-relation queries the response was YES. [2023-11-17 12:33:50,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8618 conditions, 2262 events. 1625/2262 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7906 event pairs, 169 based on Foata normal form. 38/2224 useless extension candidates. Maximal degree in co-relation 8576. Up to 567 conditions per place. [2023-11-17 12:33:50,908 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 141 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2023-11-17 12:33:50,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1386 flow [2023-11-17 12:33:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:33:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:33:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 295 transitions. [2023-11-17 12:33:50,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2023-11-17 12:33:50,910 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 295 transitions. [2023-11-17 12:33:50,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 295 transitions. [2023-11-17 12:33:50,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:50,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 295 transitions. [2023-11-17 12:33:50,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 16.38888888888889) internal successors, (295), 18 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:50,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 50.0) internal successors, (950), 19 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:50,913 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 50.0) internal successors, (950), 19 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:50,913 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 274 flow. Second operand 18 states and 295 transitions. [2023-11-17 12:33:50,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1386 flow [2023-11-17 12:33:50,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 183 transitions, 1342 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 12:33:50,925 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 588 flow [2023-11-17 12:33:50,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2023-11-17 12:33:50,926 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-11-17 12:33:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 588 flow [2023-11-17 12:33:50,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:50,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:50,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:50,933 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 12:33:51,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:51,133 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 12:33:51,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1998236389, now seen corresponding path program 5 times [2023-11-17 12:33:51,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:51,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882469007] [2023-11-17 12:33:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:51,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-17 12:33:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882469007] [2023-11-17 12:33:51,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882469007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055500651] [2023-11-17 12:33:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:33:51,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:51,314 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 12:33:51,335 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 12:33:51,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:33:51,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:51,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:51,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-17 12:33:51,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-17 12:33:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055500651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:51,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:51,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:33:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531305600] [2023-11-17 12:33:51,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:51,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:33:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:33:51,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:33:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:33:51,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 588 flow. Second operand has 13 states, 13 states have (on average 10.538461538461538) internal successors, (137), 13 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:51,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:51,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:33:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:52,275 INFO L124 PetriNetUnfolderBase]: 2826/3951 cut-off events. [2023-11-17 12:33:52,275 INFO L125 PetriNetUnfolderBase]: For 10437/10437 co-relation queries the response was YES. [2023-11-17 12:33:52,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3951 events. 2826/3951 cut-off events. For 10437/10437 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 15490 event pairs, 641 based on Foata normal form. 190/4065 useless extension candidates. Maximal degree in co-relation 15694. Up to 1719 conditions per place. [2023-11-17 12:33:52,305 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 192 selfloop transitions, 36 changer transitions 16/244 dead transitions. [2023-11-17 12:33:52,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 244 transitions, 2019 flow [2023-11-17 12:33:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:33:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:33:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 263 transitions. [2023-11-17 12:33:52,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757142857142857 [2023-11-17 12:33:52,307 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 263 transitions. [2023-11-17 12:33:52,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 263 transitions. [2023-11-17 12:33:52,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:52,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 263 transitions. [2023-11-17 12:33:52,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.785714285714285) internal successors, (263), 14 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:52,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 50.0) internal successors, (750), 15 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:52,310 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 50.0) internal successors, (750), 15 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:52,310 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 588 flow. Second operand 14 states and 263 transitions. [2023-11-17 12:33:52,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 244 transitions, 2019 flow [2023-11-17 12:33:52,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 244 transitions, 1894 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-11-17 12:33:52,352 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 903 flow [2023-11-17 12:33:52,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=903, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-11-17 12:33:52,353 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 65 predicate places. [2023-11-17 12:33:52,353 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 903 flow [2023-11-17 12:33:52,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.538461538461538) internal successors, (137), 13 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:52,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:52,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:52,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 12:33:52,560 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,SelfDestructingSolverStorable11 [2023-11-17 12:33:52,561 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 12:33:52,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1851859327, now seen corresponding path program 6 times [2023-11-17 12:33:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:52,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974459932] [2023-11-17 12:33:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974459932] [2023-11-17 12:33:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974459932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654588592] [2023-11-17 12:33:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:33:52,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:52,793 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 12:33:52,813 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 12:33:53,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:33:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:53,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:53,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:53,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:33:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654588592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:53,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:53,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:33:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424023128] [2023-11-17 12:33:53,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:33:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:33:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:33:53,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:33:53,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 903 flow. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:53,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:53,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:33:53,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:53,958 INFO L124 PetriNetUnfolderBase]: 3302/4619 cut-off events. [2023-11-17 12:33:53,958 INFO L125 PetriNetUnfolderBase]: For 25596/25596 co-relation queries the response was YES. [2023-11-17 12:33:53,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23813 conditions, 4619 events. 3302/4619 cut-off events. For 25596/25596 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18372 event pairs, 339 based on Foata normal form. 38/4657 useless extension candidates. Maximal degree in co-relation 23759. Up to 1541 conditions per place. [2023-11-17 12:33:53,995 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 175 selfloop transitions, 51 changer transitions 15/241 dead transitions. [2023-11-17 12:33:53,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 241 transitions, 2219 flow [2023-11-17 12:33:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:33:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:33:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 245 transitions. [2023-11-17 12:33:53,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2023-11-17 12:33:53,998 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 245 transitions. [2023-11-17 12:33:53,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 245 transitions. [2023-11-17 12:33:53,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:53,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 245 transitions. [2023-11-17 12:33:53,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.846153846153847) internal successors, (245), 13 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:54,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 50.0) internal successors, (700), 14 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:54,002 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 50.0) internal successors, (700), 14 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:54,002 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 903 flow. Second operand 13 states and 245 transitions. [2023-11-17 12:33:54,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 241 transitions, 2219 flow [2023-11-17 12:33:54,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 241 transitions, 2205 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-17 12:33:54,077 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 1199 flow [2023-11-17 12:33:54,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1199, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2023-11-17 12:33:54,079 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2023-11-17 12:33:54,079 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 1199 flow [2023-11-17 12:33:54,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:54,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:54,079 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:54,089 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 12:33:54,286 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,SelfDestructingSolverStorable12 [2023-11-17 12:33:54,286 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 12:33:54,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:54,286 INFO L85 PathProgramCache]: Analyzing trace with hash -295488543, now seen corresponding path program 7 times [2023-11-17 12:33:54,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:54,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422119219] [2023-11-17 12:33:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:54,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:54,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422119219] [2023-11-17 12:33:54,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422119219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2320635] [2023-11-17 12:33:54,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:33:54,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:54,466 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 12:33:54,486 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 12:33:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:54,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:33:54,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:54,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 12:33:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2320635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:54,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:33:54,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643661151] [2023-11-17 12:33:54,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:54,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:33:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:33:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:33:54,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:54,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 1199 flow. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:54,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:54,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:54,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:56,030 INFO L124 PetriNetUnfolderBase]: 4692/6657 cut-off events. [2023-11-17 12:33:56,030 INFO L125 PetriNetUnfolderBase]: For 46969/46969 co-relation queries the response was YES. [2023-11-17 12:33:56,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36448 conditions, 6657 events. 4692/6657 cut-off events. For 46969/46969 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 29004 event pairs, 1901 based on Foata normal form. 142/6799 useless extension candidates. Maximal degree in co-relation 33901. Up to 4616 conditions per place. [2023-11-17 12:33:56,085 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 105 selfloop transitions, 8 changer transitions 130/243 dead transitions. [2023-11-17 12:33:56,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 243 transitions, 2931 flow [2023-11-17 12:33:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:33:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:33:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2023-11-17 12:33:56,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32166666666666666 [2023-11-17 12:33:56,088 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 193 transitions. [2023-11-17 12:33:56,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 193 transitions. [2023-11-17 12:33:56,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:56,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 193 transitions. [2023-11-17 12:33:56,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:56,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:56,092 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:56,092 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 1199 flow. Second operand 12 states and 193 transitions. [2023-11-17 12:33:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 243 transitions, 2931 flow [2023-11-17 12:33:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 243 transitions, 2865 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-17 12:33:56,258 INFO L231 Difference]: Finished difference. Result has 127 places, 113 transitions, 1231 flow [2023-11-17 12:33:56,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1231, PETRI_PLACES=127, PETRI_TRANSITIONS=113} [2023-11-17 12:33:56,258 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2023-11-17 12:33:56,258 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 113 transitions, 1231 flow [2023-11-17 12:33:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:56,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:56,259 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:56,272 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 12:33:56,465 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,SelfDestructingSolverStorable13 [2023-11-17 12:33:56,465 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 12:33:56,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash 687153020, now seen corresponding path program 8 times [2023-11-17 12:33:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720575603] [2023-11-17 12:33:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-17 12:33:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720575603] [2023-11-17 12:33:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720575603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146515388] [2023-11-17 12:33:56,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:33:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:56,685 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 12:33:56,704 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 12:33:56,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:33:56,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:56,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:33:56,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-17 12:33:56,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-17 12:33:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146515388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:57,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:57,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:33:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038466212] [2023-11-17 12:33:57,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:33:57,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:33:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:33:57,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-17 12:33:57,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 113 transitions, 1231 flow. Second operand has 20 states, 20 states have (on average 11.55) internal successors, (231), 20 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:57,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:57,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-17 12:33:57,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:57,888 INFO L124 PetriNetUnfolderBase]: 3865/5398 cut-off events. [2023-11-17 12:33:57,888 INFO L125 PetriNetUnfolderBase]: For 43581/43581 co-relation queries the response was YES. [2023-11-17 12:33:57,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30396 conditions, 5398 events. 3865/5398 cut-off events. For 43581/43581 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22522 event pairs, 1060 based on Foata normal form. 214/5612 useless extension candidates. Maximal degree in co-relation 30318. Up to 3057 conditions per place. [2023-11-17 12:33:57,936 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 255 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2023-11-17 12:33:57,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 273 transitions, 3697 flow [2023-11-17 12:33:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:33:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:33:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2023-11-17 12:33:57,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31333333333333335 [2023-11-17 12:33:57,938 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 188 transitions. [2023-11-17 12:33:57,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 188 transitions. [2023-11-17 12:33:57,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:57,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 188 transitions. [2023-11-17 12:33:57,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 15.666666666666666) internal successors, (188), 12 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:57,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:57,940 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:57,940 INFO L175 Difference]: Start difference. First operand has 127 places, 113 transitions, 1231 flow. Second operand 12 states and 188 transitions. [2023-11-17 12:33:57,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 273 transitions, 3697 flow [2023-11-17 12:33:58,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 273 transitions, 3555 flow, removed 65 selfloop flow, removed 8 redundant places. [2023-11-17 12:33:58,052 INFO L231 Difference]: Finished difference. Result has 124 places, 114 transitions, 1235 flow [2023-11-17 12:33:58,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1235, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2023-11-17 12:33:58,053 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 91 predicate places. [2023-11-17 12:33:58,053 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 1235 flow [2023-11-17 12:33:58,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.55) internal successors, (231), 20 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:58,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:58,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:58,064 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 12:33:58,259 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,SelfDestructingSolverStorable14 [2023-11-17 12:33:58,260 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 12:33:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1224262194, now seen corresponding path program 9 times [2023-11-17 12:33:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:58,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601760632] [2023-11-17 12:33:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 12:33:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601760632] [2023-11-17 12:33:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601760632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657546601] [2023-11-17 12:33:58,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:33:58,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:58,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:58,449 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 12:33:58,472 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 12:33:58,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:33:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:58,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:33:58,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 12:33:58,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 12:33:58,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657546601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:58,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:58,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:33:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371227441] [2023-11-17 12:33:58,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:58,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:33:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:33:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:33:58,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:33:58,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 114 transitions, 1235 flow. Second operand has 20 states, 20 states have (on average 10.5) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:58,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:58,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:33:58,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:59,821 INFO L124 PetriNetUnfolderBase]: 4369/6078 cut-off events. [2023-11-17 12:33:59,822 INFO L125 PetriNetUnfolderBase]: For 43405/43405 co-relation queries the response was YES. [2023-11-17 12:33:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34769 conditions, 6078 events. 4369/6078 cut-off events. For 43405/43405 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 24542 event pairs, 657 based on Foata normal form. 44/6122 useless extension candidates. Maximal degree in co-relation 34696. Up to 2354 conditions per place. [2023-11-17 12:33:59,965 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 139 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2023-11-17 12:33:59,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 2192 flow [2023-11-17 12:33:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:33:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:33:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 195 transitions. [2023-11-17 12:33:59,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2023-11-17 12:33:59,966 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 195 transitions. [2023-11-17 12:33:59,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 195 transitions. [2023-11-17 12:33:59,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:59,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 195 transitions. [2023-11-17 12:33:59,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.0) internal successors, (195), 13 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:59,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 50.0) internal successors, (700), 14 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:59,969 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 50.0) internal successors, (700), 14 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:59,969 INFO L175 Difference]: Start difference. First operand has 124 places, 114 transitions, 1235 flow. Second operand 13 states and 195 transitions. [2023-11-17 12:33:59,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 2192 flow [2023-11-17 12:34:00,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 2108 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-11-17 12:34:00,118 INFO L231 Difference]: Finished difference. Result has 129 places, 123 transitions, 1437 flow [2023-11-17 12:34:00,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1437, PETRI_PLACES=129, PETRI_TRANSITIONS=123} [2023-11-17 12:34:00,119 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2023-11-17 12:34:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 123 transitions, 1437 flow [2023-11-17 12:34:00,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.5) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:00,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:00,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:00,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:00,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:34:00,326 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 12:34:00,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash -869268649, now seen corresponding path program 10 times [2023-11-17 12:34:00,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:00,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038005633] [2023-11-17 12:34:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-17 12:34:00,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038005633] [2023-11-17 12:34:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038005633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670305787] [2023-11-17 12:34:00,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:34:00,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:00,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:00,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:34:00,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:34:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:00,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:34:00,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-17 12:34:00,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-17 12:34:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670305787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:01,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:01,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:34:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748239180] [2023-11-17 12:34:01,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:01,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:34:01,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:34:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:34:01,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:34:01,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 123 transitions, 1437 flow. Second operand has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:01,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:01,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:34:01,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:02,455 INFO L124 PetriNetUnfolderBase]: 5969/8286 cut-off events. [2023-11-17 12:34:02,455 INFO L125 PetriNetUnfolderBase]: For 57167/57167 co-relation queries the response was YES. [2023-11-17 12:34:02,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47061 conditions, 8286 events. 5969/8286 cut-off events. For 57167/57167 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 35175 event pairs, 497 based on Foata normal form. 44/8330 useless extension candidates. Maximal degree in co-relation 46987. Up to 2243 conditions per place. [2023-11-17 12:34:02,532 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 290 selfloop transitions, 81 changer transitions 56/427 dead transitions. [2023-11-17 12:34:02,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 427 transitions, 4543 flow [2023-11-17 12:34:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:34:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:34:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 411 transitions. [2023-11-17 12:34:02,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37363636363636366 [2023-11-17 12:34:02,535 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 411 transitions. [2023-11-17 12:34:02,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 411 transitions. [2023-11-17 12:34:02,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:02,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 411 transitions. [2023-11-17 12:34:02,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 18.681818181818183) internal successors, (411), 22 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:02,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:02,539 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:02,539 INFO L175 Difference]: Start difference. First operand has 129 places, 123 transitions, 1437 flow. Second operand 22 states and 411 transitions. [2023-11-17 12:34:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 427 transitions, 4543 flow [2023-11-17 12:34:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 427 transitions, 4453 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-17 12:34:02,861 INFO L231 Difference]: Finished difference. Result has 152 places, 153 transitions, 2099 flow [2023-11-17 12:34:02,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2099, PETRI_PLACES=152, PETRI_TRANSITIONS=153} [2023-11-17 12:34:02,861 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 119 predicate places. [2023-11-17 12:34:02,861 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 153 transitions, 2099 flow [2023-11-17 12:34:02,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:02,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:02,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:02,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:03,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:34:03,070 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 12:34:03,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1791575449, now seen corresponding path program 11 times [2023-11-17 12:34:03,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:03,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565099351] [2023-11-17 12:34:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-17 12:34:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:03,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565099351] [2023-11-17 12:34:03,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565099351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:03,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377007042] [2023-11-17 12:34:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:34:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:03,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:03,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:34:03,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-17 12:34:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:03,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:34:03,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-17 12:34:04,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-17 12:34:04,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377007042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:04,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-17 12:34:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673386597] [2023-11-17 12:34:04,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:34:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:34:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:34:04,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:34:04,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 153 transitions, 2099 flow. Second operand has 24 states, 24 states have (on average 10.625) internal successors, (255), 24 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 12:34:04,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:04,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:34:04,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:05,900 INFO L124 PetriNetUnfolderBase]: 8080/11302 cut-off events. [2023-11-17 12:34:05,901 INFO L125 PetriNetUnfolderBase]: For 126582/126582 co-relation queries the response was YES. [2023-11-17 12:34:05,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71283 conditions, 11302 events. 8080/11302 cut-off events. For 126582/126582 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51429 event pairs, 3178 based on Foata normal form. 152/11454 useless extension candidates. Maximal degree in co-relation 66745. Up to 7469 conditions per place. [2023-11-17 12:34:06,016 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 145 selfloop transitions, 10 changer transitions 196/351 dead transitions. [2023-11-17 12:34:06,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 351 transitions, 5056 flow [2023-11-17 12:34:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:34:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:34:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 234 transitions. [2023-11-17 12:34:06,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.312 [2023-11-17 12:34:06,018 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 234 transitions. [2023-11-17 12:34:06,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 234 transitions. [2023-11-17 12:34:06,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:06,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 234 transitions. [2023-11-17 12:34:06,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.6) internal successors, (234), 15 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 12:34:06,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 50.0) internal successors, (800), 16 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:06,022 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 50.0) internal successors, (800), 16 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:06,022 INFO L175 Difference]: Start difference. First operand has 152 places, 153 transitions, 2099 flow. Second operand 15 states and 234 transitions. [2023-11-17 12:34:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 351 transitions, 5056 flow [2023-11-17 12:34:06,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 351 transitions, 4848 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-11-17 12:34:06,527 INFO L231 Difference]: Finished difference. Result has 165 places, 155 transitions, 2092 flow [2023-11-17 12:34:06,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2092, PETRI_PLACES=165, PETRI_TRANSITIONS=155} [2023-11-17 12:34:06,528 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 132 predicate places. [2023-11-17 12:34:06,528 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 155 transitions, 2092 flow [2023-11-17 12:34:06,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.625) internal successors, (255), 24 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 12:34:06,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:06,528 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:06,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:06,736 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:06,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1351764266, now seen corresponding path program 12 times [2023-11-17 12:34:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494212905] [2023-11-17 12:34:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 12:34:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494212905] [2023-11-17 12:34:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494212905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616207402] [2023-11-17 12:34:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:34:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:07,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:07,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:34:07,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:34:07,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:07,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:34:07,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-17 12:34:07,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-17 12:34:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616207402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:07,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:07,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-17 12:34:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498620389] [2023-11-17 12:34:07,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:07,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:34:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:34:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:34:07,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:34:07,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 155 transitions, 2092 flow. Second operand has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:07,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:07,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:34:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:11,435 INFO L124 PetriNetUnfolderBase]: 13348/18213 cut-off events. [2023-11-17 12:34:11,435 INFO L125 PetriNetUnfolderBase]: For 253701/253701 co-relation queries the response was YES. [2023-11-17 12:34:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121115 conditions, 18213 events. 13348/18213 cut-off events. For 253701/253701 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 87145 event pairs, 1933 based on Foata normal form. 786/18999 useless extension candidates. Maximal degree in co-relation 121013. Up to 5176 conditions per place. [2023-11-17 12:34:11,651 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 964 selfloop transitions, 164 changer transitions 5/1133 dead transitions. [2023-11-17 12:34:11,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1133 transitions, 18562 flow [2023-11-17 12:34:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:34:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:34:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 444 transitions. [2023-11-17 12:34:11,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3415384615384615 [2023-11-17 12:34:11,653 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 444 transitions. [2023-11-17 12:34:11,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 444 transitions. [2023-11-17 12:34:11,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:11,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 444 transitions. [2023-11-17 12:34:11,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 17.076923076923077) internal successors, (444), 26 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:11,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 50.0) internal successors, (1350), 27 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:11,656 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 50.0) internal successors, (1350), 27 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:11,656 INFO L175 Difference]: Start difference. First operand has 165 places, 155 transitions, 2092 flow. Second operand 26 states and 444 transitions. [2023-11-17 12:34:11,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 1133 transitions, 18562 flow [2023-11-17 12:34:12,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 1133 transitions, 17950 flow, removed 298 selfloop flow, removed 10 redundant places. [2023-11-17 12:34:12,622 INFO L231 Difference]: Finished difference. Result has 177 places, 306 transitions, 4961 flow [2023-11-17 12:34:12,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4961, PETRI_PLACES=177, PETRI_TRANSITIONS=306} [2023-11-17 12:34:12,622 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 144 predicate places. [2023-11-17 12:34:12,623 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 306 transitions, 4961 flow [2023-11-17 12:34:12,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.62962962962963) internal successors, (287), 27 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:12,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:12,623 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:12,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 12:34:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:12,824 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -757996034, now seen corresponding path program 13 times [2023-11-17 12:34:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370325117] [2023-11-17 12:34:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-17 12:34:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370325117] [2023-11-17 12:34:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370325117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776441708] [2023-11-17 12:34:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:34:13,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:13,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:13,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:34:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:13,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:34:13,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-17 12:34:13,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-17 12:34:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776441708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:13,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:13,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-11-17 12:34:13,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085977073] [2023-11-17 12:34:13,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:13,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:34:13,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:34:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:34:13,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2023-11-17 12:34:13,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 306 transitions, 4961 flow. Second operand has 25 states, 25 states have (on average 10.28) internal successors, (257), 25 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:13,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:13,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2023-11-17 12:34:13,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:16,870 INFO L124 PetriNetUnfolderBase]: 14648/19937 cut-off events. [2023-11-17 12:34:16,870 INFO L125 PetriNetUnfolderBase]: For 305376/305376 co-relation queries the response was YES. [2023-11-17 12:34:16,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145746 conditions, 19937 events. 14648/19937 cut-off events. For 305376/305376 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 92350 event pairs, 1539 based on Foata normal form. 106/20043 useless extension candidates. Maximal degree in co-relation 145646. Up to 6381 conditions per place. [2023-11-17 12:34:17,057 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 502 selfloop transitions, 64 changer transitions 0/566 dead transitions. [2023-11-17 12:34:17,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 566 transitions, 10289 flow [2023-11-17 12:34:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:34:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:34:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 235 transitions. [2023-11-17 12:34:17,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29375 [2023-11-17 12:34:17,060 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 235 transitions. [2023-11-17 12:34:17,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 235 transitions. [2023-11-17 12:34:17,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:17,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 235 transitions. [2023-11-17 12:34:17,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 14.6875) internal successors, (235), 16 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:17,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 50.0) internal successors, (850), 17 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:17,062 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 50.0) internal successors, (850), 17 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:17,062 INFO L175 Difference]: Start difference. First operand has 177 places, 306 transitions, 4961 flow. Second operand 16 states and 235 transitions. [2023-11-17 12:34:17,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 566 transitions, 10289 flow [2023-11-17 12:34:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 566 transitions, 9394 flow, removed 374 selfloop flow, removed 13 redundant places. [2023-11-17 12:34:18,741 INFO L231 Difference]: Finished difference. Result has 181 places, 315 transitions, 5045 flow [2023-11-17 12:34:18,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5045, PETRI_PLACES=181, PETRI_TRANSITIONS=315} [2023-11-17 12:34:18,742 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 148 predicate places. [2023-11-17 12:34:18,742 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 315 transitions, 5045 flow [2023-11-17 12:34:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.28) internal successors, (257), 25 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:18,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:18,743 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:18,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:18,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:18,948 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:18,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1844037583, now seen corresponding path program 14 times [2023-11-17 12:34:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68195872] [2023-11-17 12:34:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 12:34:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:19,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68195872] [2023-11-17 12:34:19,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68195872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:19,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519521573] [2023-11-17 12:34:19,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:34:19,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:19,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:19,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:34:19,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:34:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:19,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:34:19,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 12:34:19,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 12:34:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519521573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:19,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:19,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-17 12:34:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446455037] [2023-11-17 12:34:19,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:34:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:34:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:34:19,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:34:19,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 315 transitions, 5045 flow. Second operand has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:19,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:19,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:34:19,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:24,574 INFO L124 PetriNetUnfolderBase]: 20697/28064 cut-off events. [2023-11-17 12:34:24,575 INFO L125 PetriNetUnfolderBase]: For 378334/378334 co-relation queries the response was YES. [2023-11-17 12:34:24,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193224 conditions, 28064 events. 20697/28064 cut-off events. For 378334/378334 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 136370 event pairs, 1285 based on Foata normal form. 106/28170 useless extension candidates. Maximal degree in co-relation 193126. Up to 7385 conditions per place. [2023-11-17 12:34:24,866 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 756 selfloop transitions, 273 changer transitions 387/1416 dead transitions. [2023-11-17 12:34:24,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1416 transitions, 20396 flow [2023-11-17 12:34:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:34:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:34:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 626 transitions. [2023-11-17 12:34:24,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36823529411764705 [2023-11-17 12:34:24,868 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 626 transitions. [2023-11-17 12:34:24,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 626 transitions. [2023-11-17 12:34:24,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:24,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 626 transitions. [2023-11-17 12:34:24,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 18.41176470588235) internal successors, (626), 34 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:24,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 50.0) internal successors, (1750), 35 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:24,873 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 50.0) internal successors, (1750), 35 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:24,873 INFO L175 Difference]: Start difference. First operand has 181 places, 315 transitions, 5045 flow. Second operand 34 states and 626 transitions. [2023-11-17 12:34:24,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1416 transitions, 20396 flow [2023-11-17 12:34:27,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1416 transitions, 20257 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-17 12:34:27,403 INFO L231 Difference]: Finished difference. Result has 217 places, 395 transitions, 7468 flow [2023-11-17 12:34:27,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7468, PETRI_PLACES=217, PETRI_TRANSITIONS=395} [2023-11-17 12:34:27,404 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 184 predicate places. [2023-11-17 12:34:27,404 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 395 transitions, 7468 flow [2023-11-17 12:34:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:27,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:27,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:27,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:27,611 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:27,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 8022919, now seen corresponding path program 15 times [2023-11-17 12:34:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694853412] [2023-11-17 12:34:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-17 12:34:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694853412] [2023-11-17 12:34:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694853412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457931313] [2023-11-17 12:34:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:34:27,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:27,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:27,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:27,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:34:28,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:34:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:28,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 12:34:28,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-17 12:34:28,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-17 12:34:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457931313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:28,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:28,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 17 [2023-11-17 12:34:28,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866196198] [2023-11-17 12:34:28,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:34:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:34:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:34:28,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2023-11-17 12:34:28,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 395 transitions, 7468 flow. Second operand has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:28,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:28,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2023-11-17 12:34:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:37,063 INFO L124 PetriNetUnfolderBase]: 31936/43697 cut-off events. [2023-11-17 12:34:37,063 INFO L125 PetriNetUnfolderBase]: For 929250/929250 co-relation queries the response was YES. [2023-11-17 12:34:37,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327484 conditions, 43697 events. 31936/43697 cut-off events. For 929250/929250 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 232705 event pairs, 425 based on Foata normal form. 770/44467 useless extension candidates. Maximal degree in co-relation 308253. Up to 12297 conditions per place. [2023-11-17 12:34:37,550 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 0 selfloop transitions, 0 changer transitions 1944/1944 dead transitions. [2023-11-17 12:34:37,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1944 transitions, 31000 flow [2023-11-17 12:34:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 12:34:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 12:34:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 727 transitions. [2023-11-17 12:34:37,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30936170212765957 [2023-11-17 12:34:37,552 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 727 transitions. [2023-11-17 12:34:37,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 727 transitions. [2023-11-17 12:34:37,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:37,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 727 transitions. [2023-11-17 12:34:37,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 15.46808510638298) internal successors, (727), 47 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:37,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 50.0) internal successors, (2400), 48 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:37,557 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 50.0) internal successors, (2400), 48 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:37,557 INFO L175 Difference]: Start difference. First operand has 217 places, 395 transitions, 7468 flow. Second operand 47 states and 727 transitions. [2023-11-17 12:34:37,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 1944 transitions, 31000 flow [2023-11-17 12:34:47,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1944 transitions, 29114 flow, removed 406 selfloop flow, removed 16 redundant places. [2023-11-17 12:34:47,041 INFO L231 Difference]: Finished difference. Result has 242 places, 0 transitions, 0 flow [2023-11-17 12:34:47,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=0, PETRI_PLACES=242, PETRI_TRANSITIONS=0} [2023-11-17 12:34:47,041 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 209 predicate places. [2023-11-17 12:34:47,042 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 0 transitions, 0 flow [2023-11-17 12:34:47,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:47,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 12:34:47,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 12:34:47,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 12:34:47,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 12:34:47,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:47,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:47,246 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:47,249 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:34:47,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:34:47,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:34:47 BasicIcfg [2023-11-17 12:34:47,251 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:34:47,252 INFO L158 Benchmark]: Toolchain (without parser) took 67202.26ms. Allocated memory was 268.4MB in the beginning and 6.3GB in the end (delta: 6.0GB). Free memory was 219.6MB in the beginning and 4.1GB in the end (delta: -3.9GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2023-11-17 12:34:47,252 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 151.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:34:47,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.93ms. Allocated memory is still 268.4MB. Free memory was 219.6MB in the beginning and 207.8MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:34:47,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.65ms. Allocated memory is still 268.4MB. Free memory was 207.8MB in the beginning and 205.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:34:47,252 INFO L158 Benchmark]: Boogie Preprocessor took 32.78ms. Allocated memory is still 268.4MB. Free memory was 205.9MB in the beginning and 204.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:34:47,253 INFO L158 Benchmark]: RCFGBuilder took 735.38ms. Allocated memory is still 268.4MB. Free memory was 203.8MB in the beginning and 157.1MB in the end (delta: 46.8MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. [2023-11-17 12:34:47,253 INFO L158 Benchmark]: TraceAbstraction took 66154.42ms. Allocated memory was 268.4MB in the beginning and 6.3GB in the end (delta: 6.0GB). Free memory was 156.5MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2023-11-17 12:34:47,254 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 151.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.93ms. Allocated memory is still 268.4MB. Free memory was 219.6MB in the beginning and 207.8MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 38.65ms. Allocated memory is still 268.4MB. Free memory was 207.8MB in the beginning and 205.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.78ms. Allocated memory is still 268.4MB. Free memory was 205.9MB in the beginning and 204.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 735.38ms. Allocated memory is still 268.4MB. Free memory was 203.8MB in the beginning and 157.1MB in the end (delta: 46.8MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. * TraceAbstraction took 66154.42ms. Allocated memory was 268.4MB in the beginning and 6.3GB in the end (delta: 6.0GB). Free memory was 156.5MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 40 PlacesBefore, 33 PlacesAfterwards, 36 TransitionsBefore, 29 TransitionsAfterwards, 378 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 793 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 594, independent: 563, independent conditional: 0, independent unconditional: 563, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 248, independent: 233, independent conditional: 0, independent unconditional: 233, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 248, independent: 233, independent conditional: 0, independent unconditional: 233, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 44, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 594, independent: 330, independent conditional: 0, independent unconditional: 330, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 248, unknown conditional: 0, unknown unconditional: 248] , Statistics on independence cache: Total cache size (in pairs): 93, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 103]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 66.0s, OverallIterations: 22, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 49.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2436 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2436 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 245 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11209 IncrementalHoareTripleChecker+Invalid, 11454 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 245 mSolverCounterUnsat, 0 mSDtfsCounter, 11209 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1678 GetRequests, 1206 SyntacticMatches, 53 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7468occurred in iteration=21, InterpolantAutomatonStates: 309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1404 NumberOfCodeBlocks, 1384 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2001 ConstructedInterpolants, 0 QuantifiedInterpolants, 5701 SizeOfPredicates, 54 NumberOfNonLiveVariables, 5383 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 58 InterpolantComputations, 6 PerfectInterpolantSequences, 1104/1438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 12:34:47,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...