/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:17:53,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:17:53,773 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-VariableLbe.epf [2023-08-27 07:17:53,777 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:17:53,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:17:53,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:17:53,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:17:53,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:17:53,810 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:17:53,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:17:53,814 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:17:53,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:17:53,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:17:53,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:17:53,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:17:53,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:17:53,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:17:53,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:17:53,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:17:53,817 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:17:53,817 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:17:53,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:17:53,818 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:17:53,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:17:53,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:17:53,819 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:17:53,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:17:53,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:17:53,820 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:17:53,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:17:53,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:17:53,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:17:53,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:17:53,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:17:53,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:17:53,822 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:17:54,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:17:54,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:17:54,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:17:54,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:17:54,175 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:17:54,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-27 07:17:55,316 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:17:55,514 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:17:55,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-27 07:17:55,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f263063/09100a9e73d848558b844e76295ab804/FLAGba041ac73 [2023-08-27 07:17:55,531 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f263063/09100a9e73d848558b844e76295ab804 [2023-08-27 07:17:55,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:17:55,535 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:17:55,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:17:55,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:17:55,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:17:55,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb6f0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55, skipping insertion in model container [2023-08-27 07:17:55,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,561 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:17:55,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:17:55,763 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:17:55,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:17:55,803 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:17:55,803 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:17:55,809 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:17:55,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55 WrapperNode [2023-08-27 07:17:55,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:17:55,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:17:55,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:17:55,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:17:55,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,848 INFO L138 Inliner]: procedures = 21, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2023-08-27 07:17:55,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:17:55,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:17:55,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:17:55,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:17:55,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,876 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:17:55,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:17:55,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:17:55,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:17:55,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (1/1) ... [2023-08-27 07:17:55,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:17:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:17:55,926 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) [2023-08-27 07:17:55,947 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 [2023-08-27 07:17:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:17:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:17:55,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:17:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:17:55,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:17:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:17:55,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:17:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:17:55,966 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 07:17:56,068 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:17:56,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:17:56,303 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:17:56,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:17:56,359 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 07:17:56,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:17:56 BoogieIcfgContainer [2023-08-27 07:17:56,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:17:56,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:17:56,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:17:56,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:17:56,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:17:55" (1/3) ... [2023-08-27 07:17:56,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7172f050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:17:56, skipping insertion in model container [2023-08-27 07:17:56,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:17:55" (2/3) ... [2023-08-27 07:17:56,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7172f050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:17:56, skipping insertion in model container [2023-08-27 07:17:56,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:17:56" (3/3) ... [2023-08-27 07:17:56,369 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-08-27 07:17:56,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:17:56,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 07:17:56,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:17:56,438 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 07:17:56,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-08-27 07:17:56,504 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-27 07:17:56,505 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:17:56,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-27 07:17:56,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-08-27 07:17:56,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-08-27 07:17:56,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:17:56,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-27 07:17:56,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-27 07:17:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-08-27 07:17:56,548 INFO L124 PetriNetUnfolderBase]: 6/73 cut-off events. [2023-08-27 07:17:56,548 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:17:56,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-27 07:17:56,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-08-27 07:17:58,727 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-08-27 07:17:58,728 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-27 07:17:58,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:17:58,746 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=LoopsAndPotentialCycles, 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;@21d51029, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:17:58,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-27 07:17:58,751 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:17:58,751 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-27 07:17:58,752 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:17:58,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:17:58,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:17:58,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:17:58,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:17:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 153195136, now seen corresponding path program 1 times [2023-08-27 07:17:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:17:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597149116] [2023-08-27 07:17:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:17:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:17:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:17:59,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:17:59,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597149116] [2023-08-27 07:17:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597149116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:17:59,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:17:59,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:17:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693334176] [2023-08-27 07:17:59,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:17:59,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:17:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:17:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:17:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:17:59,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-27 07:17:59,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:59,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:17:59,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-27 07:17:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:17:59,478 INFO L124 PetriNetUnfolderBase]: 103/178 cut-off events. [2023-08-27 07:17:59,479 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 07:17:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 178 events. 103/178 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 488 event pairs, 19 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2023-08-27 07:17:59,483 INFO L140 encePairwiseOnDemand]: 146/151 looper letters, 30 selfloop transitions, 5 changer transitions 2/37 dead transitions. [2023-08-27 07:17:59,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 163 flow [2023-08-27 07:17:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:17:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:17:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2023-08-27 07:17:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46225165562913906 [2023-08-27 07:17:59,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2023-08-27 07:17:59,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2023-08-27 07:17:59,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:17:59,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2023-08-27 07:17:59,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:59,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:59,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:59,524 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 5 states and 349 transitions. [2023-08-27 07:17:59,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 163 flow [2023-08-27 07:17:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 07:17:59,529 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 75 flow [2023-08-27 07:17:59,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-27 07:17:59,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-27 07:17:59,534 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 75 flow [2023-08-27 07:17:59,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:17:59,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:17:59,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:17:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:17:59,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:17:59,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:17:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash 990894297, now seen corresponding path program 1 times [2023-08-27 07:17:59,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:17:59,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904708897] [2023-08-27 07:17:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:17:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:17:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904708897] [2023-08-27 07:18:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904708897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:18:00,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419344615] [2023-08-27 07:18:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:18:00,289 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) [2023-08-27 07:18:00,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 07:18:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:00,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 07:18:00,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:18:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:00,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:18:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419344615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:18:01,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:18:01,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-27 07:18:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141211285] [2023-08-27 07:18:01,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:18:01,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:18:01,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:18:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:18:01,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:18:01,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 75 flow. Second operand has 19 states, 19 states have (on average 55.36842105263158) internal successors, (1052), 19 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:01,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:01,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:18:01,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:18:03,320 INFO L124 PetriNetUnfolderBase]: 466/795 cut-off events. [2023-08-27 07:18:03,320 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-27 07:18:03,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2032 conditions, 795 events. 466/795 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3438 event pairs, 6 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 732. Up to 153 conditions per place. [2023-08-27 07:18:03,327 INFO L140 encePairwiseOnDemand]: 141/151 looper letters, 109 selfloop transitions, 84 changer transitions 43/236 dead transitions. [2023-08-27 07:18:03,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 236 transitions, 1218 flow [2023-08-27 07:18:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 07:18:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 07:18:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2404 transitions. [2023-08-27 07:18:03,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38830560491035376 [2023-08-27 07:18:03,336 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2404 transitions. [2023-08-27 07:18:03,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2404 transitions. [2023-08-27 07:18:03,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:18:03,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2404 transitions. [2023-08-27 07:18:03,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.63414634146341) internal successors, (2404), 41 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,357 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,357 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 75 flow. Second operand 41 states and 2404 transitions. [2023-08-27 07:18:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 236 transitions, 1218 flow [2023-08-27 07:18:03,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 236 transitions, 1209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:18:03,364 INFO L231 Difference]: Finished difference. Result has 90 places, 113 transitions, 720 flow [2023-08-27 07:18:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=113} [2023-08-27 07:18:03,365 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-08-27 07:18:03,365 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 113 transitions, 720 flow [2023-08-27 07:18:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.36842105263158) internal successors, (1052), 19 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:18:03,366 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:18:03,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 07:18:03,579 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 [2023-08-27 07:18:03,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:18:03,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:18:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1588433108, now seen corresponding path program 2 times [2023-08-27 07:18:03,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:18:03,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577849296] [2023-08-27 07:18:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:18:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:03,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:03,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577849296] [2023-08-27 07:18:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577849296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:18:03,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:18:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 07:18:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072876619] [2023-08-27 07:18:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:18:03,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:18:03,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:18:03,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:18:03,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-08-27 07:18:03,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:03,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-08-27 07:18:03,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:18:03,911 INFO L124 PetriNetUnfolderBase]: 416/709 cut-off events. [2023-08-27 07:18:03,911 INFO L125 PetriNetUnfolderBase]: For 6187/6187 co-relation queries the response was YES. [2023-08-27 07:18:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 709 events. 416/709 cut-off events. For 6187/6187 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2911 event pairs, 32 based on Foata normal form. 20/695 useless extension candidates. Maximal degree in co-relation 2847. Up to 254 conditions per place. [2023-08-27 07:18:03,919 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 118 selfloop transitions, 67 changer transitions 3/188 dead transitions. [2023-08-27 07:18:03,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 188 transitions, 1564 flow [2023-08-27 07:18:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:18:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:18:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2023-08-27 07:18:03,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44260485651214126 [2023-08-27 07:18:03,921 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 401 transitions. [2023-08-27 07:18:03,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 401 transitions. [2023-08-27 07:18:03,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:18:03,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 401 transitions. [2023-08-27 07:18:03,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,925 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,925 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 720 flow. Second operand 6 states and 401 transitions. [2023-08-27 07:18:03,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 188 transitions, 1564 flow [2023-08-27 07:18:03,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 188 transitions, 1499 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-08-27 07:18:03,949 INFO L231 Difference]: Finished difference. Result has 90 places, 142 transitions, 1152 flow [2023-08-27 07:18:03,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1152, PETRI_PLACES=90, PETRI_TRANSITIONS=142} [2023-08-27 07:18:03,950 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-08-27 07:18:03,950 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 142 transitions, 1152 flow [2023-08-27 07:18:03,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:03,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:18:03,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:18:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 07:18:03,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:18:03,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:18:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 766119949, now seen corresponding path program 1 times [2023-08-27 07:18:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:18:03,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588129925] [2023-08-27 07:18:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:18:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:06,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:18:06,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588129925] [2023-08-27 07:18:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588129925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:18:06,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492325759] [2023-08-27 07:18:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:18:06,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:18:06,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:18:06,125 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) [2023-08-27 07:18:06,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 07:18:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:18:06,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 07:18:06,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:18:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:06,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:18:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:18:11,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492325759] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:18:11,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:18:11,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-27 07:18:11,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109069901] [2023-08-27 07:18:11,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:18:11,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:18:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:18:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:18:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-27 07:18:11,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:18:11,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 142 transitions, 1152 flow. Second operand has 24 states, 24 states have (on average 57.208333333333336) internal successors, (1373), 24 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:18:11,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:18:11,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:18:11,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:18:25,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:18:34,589 WARN L234 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 111 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:18:44,703 WARN L234 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 113 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:18:46,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:18:48,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:18:50,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:19:00,809 INFO L124 PetriNetUnfolderBase]: 1036/1811 cut-off events. [2023-08-27 07:19:00,809 INFO L125 PetriNetUnfolderBase]: For 17062/17062 co-relation queries the response was YES. [2023-08-27 07:19:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 1811 events. 1036/1811 cut-off events. For 17062/17062 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9416 event pairs, 1 based on Foata normal form. 12/1823 useless extension candidates. Maximal degree in co-relation 8411. Up to 359 conditions per place. [2023-08-27 07:19:00,824 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 226 selfloop transitions, 227 changer transitions 82/535 dead transitions. [2023-08-27 07:19:00,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 535 transitions, 5164 flow [2023-08-27 07:19:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-27 07:19:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-27 07:19:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3035 transitions. [2023-08-27 07:19:00,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019867549668874 [2023-08-27 07:19:00,835 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3035 transitions. [2023-08-27 07:19:00,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3035 transitions. [2023-08-27 07:19:00,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:00,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3035 transitions. [2023-08-27 07:19:00,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 60.7) internal successors, (3035), 50 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:00,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 151.0) internal successors, (7701), 51 states have internal predecessors, (7701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:00,856 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 151.0) internal successors, (7701), 51 states have internal predecessors, (7701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:00,856 INFO L175 Difference]: Start difference. First operand has 90 places, 142 transitions, 1152 flow. Second operand 50 states and 3035 transitions. [2023-08-27 07:19:00,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 535 transitions, 5164 flow [2023-08-27 07:19:00,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 535 transitions, 5149 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-27 07:19:00,910 INFO L231 Difference]: Finished difference. Result has 156 places, 315 transitions, 3452 flow [2023-08-27 07:19:00,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3452, PETRI_PLACES=156, PETRI_TRANSITIONS=315} [2023-08-27 07:19:00,911 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2023-08-27 07:19:00,911 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 315 transitions, 3452 flow [2023-08-27 07:19:00,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.208333333333336) internal successors, (1373), 24 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:00,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:00,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:00,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:19:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-27 07:19:01,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:19:01,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1997032645, now seen corresponding path program 2 times [2023-08-27 07:19:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399361194] [2023-08-27 07:19:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399361194] [2023-08-27 07:19:02,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399361194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787598019] [2023-08-27 07:19:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:19:02,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:02,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:02,003 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) [2023-08-27 07:19:02,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 07:19:02,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:19:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:19:02,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 07:19:02,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:02,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:19:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:03,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787598019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:19:03,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:19:03,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-27 07:19:03,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224335880] [2023-08-27 07:19:03,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:19:03,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:19:03,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:19:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-27 07:19:03,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:19:03,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 315 transitions, 3452 flow. Second operand has 24 states, 24 states have (on average 57.208333333333336) internal successors, (1373), 24 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:03,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:03,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:19:03,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:15,953 INFO L124 PetriNetUnfolderBase]: 1836/3193 cut-off events. [2023-08-27 07:19:15,954 INFO L125 PetriNetUnfolderBase]: For 29556/29556 co-relation queries the response was YES. [2023-08-27 07:19:15,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17563 conditions, 3193 events. 1836/3193 cut-off events. For 29556/29556 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18763 event pairs, 11 based on Foata normal form. 16/3209 useless extension candidates. Maximal degree in co-relation 17428. Up to 612 conditions per place. [2023-08-27 07:19:15,978 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 279 selfloop transitions, 482 changer transitions 103/864 dead transitions. [2023-08-27 07:19:15,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 864 transitions, 10383 flow [2023-08-27 07:19:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-27 07:19:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-27 07:19:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3804 transitions. [2023-08-27 07:19:15,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998738568274992 [2023-08-27 07:19:15,984 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3804 transitions. [2023-08-27 07:19:15,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3804 transitions. [2023-08-27 07:19:15,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:15,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3804 transitions. [2023-08-27 07:19:15,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.38095238095238) internal successors, (3804), 63 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 151.0) internal successors, (9664), 64 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,003 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 151.0) internal successors, (9664), 64 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,003 INFO L175 Difference]: Start difference. First operand has 156 places, 315 transitions, 3452 flow. Second operand 63 states and 3804 transitions. [2023-08-27 07:19:16,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 864 transitions, 10383 flow [2023-08-27 07:19:16,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 864 transitions, 9957 flow, removed 207 selfloop flow, removed 12 redundant places. [2023-08-27 07:19:16,146 INFO L231 Difference]: Finished difference. Result has 218 places, 608 transitions, 7819 flow [2023-08-27 07:19:16,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7819, PETRI_PLACES=218, PETRI_TRANSITIONS=608} [2023-08-27 07:19:16,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 196 predicate places. [2023-08-27 07:19:16,148 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 608 transitions, 7819 flow [2023-08-27 07:19:16,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.208333333333336) internal successors, (1373), 24 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:16,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:16,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:16,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 07:19:16,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:16,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:19:16,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1660061939, now seen corresponding path program 3 times [2023-08-27 07:19:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:16,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766957316] [2023-08-27 07:19:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:16,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766957316] [2023-08-27 07:19:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766957316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822729607] [2023-08-27 07:19:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:19:17,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:17,785 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) [2023-08-27 07:19:17,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 07:19:17,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:19:17,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:19:17,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 07:19:17,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:18,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:19:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822729607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:19:19,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:19:19,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 07:19:19,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854352846] [2023-08-27 07:19:19,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:19:19,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 07:19:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 07:19:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-08-27 07:19:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:19:19,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 608 transitions, 7819 flow. Second operand has 28 states, 28 states have (on average 57.035714285714285) internal successors, (1597), 28 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:19,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:19,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:19:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:32,006 INFO L124 PetriNetUnfolderBase]: 2293/4002 cut-off events. [2023-08-27 07:19:32,006 INFO L125 PetriNetUnfolderBase]: For 34795/34795 co-relation queries the response was YES. [2023-08-27 07:19:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23879 conditions, 4002 events. 2293/4002 cut-off events. For 34795/34795 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24704 event pairs, 23 based on Foata normal form. 24/4026 useless extension candidates. Maximal degree in co-relation 23750. Up to 1224 conditions per place. [2023-08-27 07:19:32,045 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 399 selfloop transitions, 501 changer transitions 133/1033 dead transitions. [2023-08-27 07:19:32,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1033 transitions, 14083 flow [2023-08-27 07:19:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-27 07:19:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-27 07:19:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3586 transitions. [2023-08-27 07:19:32,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025143113705242 [2023-08-27 07:19:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3586 transitions. [2023-08-27 07:19:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3586 transitions. [2023-08-27 07:19:32,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:32,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3586 transitions. [2023-08-27 07:19:32,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.779661016949156) internal successors, (3586), 59 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:32,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 151.0) internal successors, (9060), 60 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:32,067 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 151.0) internal successors, (9060), 60 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:32,068 INFO L175 Difference]: Start difference. First operand has 218 places, 608 transitions, 7819 flow. Second operand 59 states and 3586 transitions. [2023-08-27 07:19:32,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1033 transitions, 14083 flow [2023-08-27 07:19:32,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1033 transitions, 12976 flow, removed 327 selfloop flow, removed 23 redundant places. [2023-08-27 07:19:32,419 INFO L231 Difference]: Finished difference. Result has 268 places, 746 transitions, 10802 flow [2023-08-27 07:19:32,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=10802, PETRI_PLACES=268, PETRI_TRANSITIONS=746} [2023-08-27 07:19:32,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 246 predicate places. [2023-08-27 07:19:32,420 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 746 transitions, 10802 flow [2023-08-27 07:19:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 57.035714285714285) internal successors, (1597), 28 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:32,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:32,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 07:19:32,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:32,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:19:32,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash -961783887, now seen corresponding path program 4 times [2023-08-27 07:19:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:32,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802664414] [2023-08-27 07:19:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802664414] [2023-08-27 07:19:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802664414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974635365] [2023-08-27 07:19:33,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:19:33,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:33,701 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) [2023-08-27 07:19:33,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 07:19:34,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:19:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:19:34,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 07:19:34,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:34,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:19:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:36,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974635365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:19:36,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:19:36,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-27 07:19:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88313144] [2023-08-27 07:19:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:19:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 07:19:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:19:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 07:19:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2023-08-27 07:19:36,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:19:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 746 transitions, 10802 flow. Second operand has 31 states, 31 states have (on average 54.83870967741935) internal successors, (1700), 31 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:19:36,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:19:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:19:57,159 INFO L124 PetriNetUnfolderBase]: 3029/5307 cut-off events. [2023-08-27 07:19:57,159 INFO L125 PetriNetUnfolderBase]: For 44714/44714 co-relation queries the response was YES. [2023-08-27 07:19:57,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33976 conditions, 5307 events. 3029/5307 cut-off events. For 44714/44714 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35200 event pairs, 6 based on Foata normal form. 19/5326 useless extension candidates. Maximal degree in co-relation 33773. Up to 1146 conditions per place. [2023-08-27 07:19:57,216 INFO L140 encePairwiseOnDemand]: 140/151 looper letters, 168 selfloop transitions, 1170 changer transitions 152/1490 dead transitions. [2023-08-27 07:19:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1490 transitions, 22761 flow [2023-08-27 07:19:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-27 07:19:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-27 07:19:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5263 transitions. [2023-08-27 07:19:57,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38301433665672074 [2023-08-27 07:19:57,223 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5263 transitions. [2023-08-27 07:19:57,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5263 transitions. [2023-08-27 07:19:57,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:19:57,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5263 transitions. [2023-08-27 07:19:57,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 57.83516483516483) internal successors, (5263), 91 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:57,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 151.0) internal successors, (13892), 92 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:57,264 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 151.0) internal successors, (13892), 92 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:57,264 INFO L175 Difference]: Start difference. First operand has 268 places, 746 transitions, 10802 flow. Second operand 91 states and 5263 transitions. [2023-08-27 07:19:57,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1490 transitions, 22761 flow [2023-08-27 07:19:57,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1490 transitions, 21912 flow, removed 383 selfloop flow, removed 23 redundant places. [2023-08-27 07:19:57,779 INFO L231 Difference]: Finished difference. Result has 341 places, 1221 transitions, 20707 flow [2023-08-27 07:19:57,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=10463, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=707, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=20707, PETRI_PLACES=341, PETRI_TRANSITIONS=1221} [2023-08-27 07:19:57,781 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 319 predicate places. [2023-08-27 07:19:57,781 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1221 transitions, 20707 flow [2023-08-27 07:19:57,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.83870967741935) internal successors, (1700), 31 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:19:57,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:19:57,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:19:57,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 07:19:57,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:57,982 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:19:57,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:19:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1515359869, now seen corresponding path program 5 times [2023-08-27 07:19:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:19:57,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904766584] [2023-08-27 07:19:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:19:57,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:19:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:19:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:19:58,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904766584] [2023-08-27 07:19:58,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904766584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:19:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752665566] [2023-08-27 07:19:58,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:19:58,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:19:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:19:58,833 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) [2023-08-27 07:19:58,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 07:19:58,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:19:58,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:19:58,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 07:19:58,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:19:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:19:59,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752665566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:01,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 07:20:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076298971] [2023-08-27 07:20:01,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 07:20:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 07:20:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-08-27 07:20:01,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:20:01,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1221 transitions, 20707 flow. Second operand has 28 states, 28 states have (on average 57.035714285714285) internal successors, (1597), 28 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:01,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:01,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:20:01,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:35,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:20:45,426 INFO L124 PetriNetUnfolderBase]: 3671/6474 cut-off events. [2023-08-27 07:20:45,426 INFO L125 PetriNetUnfolderBase]: For 56350/56350 co-relation queries the response was YES. [2023-08-27 07:20:45,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47017 conditions, 6474 events. 3671/6474 cut-off events. For 56350/56350 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44796 event pairs, 7 based on Foata normal form. 28/6502 useless extension candidates. Maximal degree in co-relation 46732. Up to 2369 conditions per place. [2023-08-27 07:20:45,486 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 664 selfloop transitions, 997 changer transitions 159/1820 dead transitions. [2023-08-27 07:20:45,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1820 transitions, 32299 flow [2023-08-27 07:20:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-27 07:20:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-27 07:20:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4270 transitions. [2023-08-27 07:20:45,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982837421882287 [2023-08-27 07:20:45,492 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4270 transitions. [2023-08-27 07:20:45,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4270 transitions. [2023-08-27 07:20:45,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:45,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4270 transitions. [2023-08-27 07:20:45,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 60.140845070422536) internal successors, (4270), 71 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:45,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 151.0) internal successors, (10872), 72 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:45,510 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 151.0) internal successors, (10872), 72 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:45,510 INFO L175 Difference]: Start difference. First operand has 341 places, 1221 transitions, 20707 flow. Second operand 71 states and 4270 transitions. [2023-08-27 07:20:45,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1820 transitions, 32299 flow [2023-08-27 07:20:46,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1820 transitions, 30381 flow, removed 793 selfloop flow, removed 30 redundant places. [2023-08-27 07:20:46,624 INFO L231 Difference]: Finished difference. Result has 393 places, 1473 transitions, 27725 flow [2023-08-27 07:20:46,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=19629, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=27725, PETRI_PLACES=393, PETRI_TRANSITIONS=1473} [2023-08-27 07:20:46,626 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 371 predicate places. [2023-08-27 07:20:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1473 transitions, 27725 flow [2023-08-27 07:20:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 57.035714285714285) internal successors, (1597), 28 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:46,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:46,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:46,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:46,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:20:46,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1331578963, now seen corresponding path program 6 times [2023-08-27 07:20:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181778735] [2023-08-27 07:20:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:47,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:47,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181778735] [2023-08-27 07:20:47,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181778735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:47,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806986583] [2023-08-27 07:20:47,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:20:47,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:47,876 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) [2023-08-27 07:20:47,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 07:20:47,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 07:20:47,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:20:47,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 07:20:47,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:48,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:50,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806986583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:50,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:50,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-27 07:20:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302772289] [2023-08-27 07:20:50,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 07:20:50,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 07:20:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2023-08-27 07:20:50,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:20:50,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1473 transitions, 27725 flow. Second operand has 26 states, 26 states have (on average 55.03846153846154) internal successors, (1431), 26 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:50,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:50,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:20:50,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:08,164 INFO L124 PetriNetUnfolderBase]: 4026/7020 cut-off events. [2023-08-27 07:21:08,165 INFO L125 PetriNetUnfolderBase]: For 72631/72631 co-relation queries the response was YES. [2023-08-27 07:21:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54755 conditions, 7020 events. 4026/7020 cut-off events. For 72631/72631 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 49013 event pairs, 2 based on Foata normal form. 21/7041 useless extension candidates. Maximal degree in co-relation 54527. Up to 2358 conditions per place. [2023-08-27 07:21:08,267 INFO L140 encePairwiseOnDemand]: 140/151 looper letters, 392 selfloop transitions, 1431 changer transitions 89/1912 dead transitions. [2023-08-27 07:21:08,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1912 transitions, 38169 flow [2023-08-27 07:21:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-27 07:21:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-27 07:21:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3018 transitions. [2023-08-27 07:21:08,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38436067244014266 [2023-08-27 07:21:08,273 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3018 transitions. [2023-08-27 07:21:08,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3018 transitions. [2023-08-27 07:21:08,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:21:08,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3018 transitions. [2023-08-27 07:21:08,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 58.03846153846154) internal successors, (3018), 52 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:08,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 151.0) internal successors, (8003), 53 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:08,291 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 151.0) internal successors, (8003), 53 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:08,291 INFO L175 Difference]: Start difference. First operand has 393 places, 1473 transitions, 27725 flow. Second operand 52 states and 3018 transitions. [2023-08-27 07:21:08,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1912 transitions, 38169 flow [2023-08-27 07:21:09,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1912 transitions, 37669 flow, removed 221 selfloop flow, removed 21 redundant places. [2023-08-27 07:21:09,539 INFO L231 Difference]: Finished difference. Result has 422 places, 1721 transitions, 36408 flow [2023-08-27 07:21:09,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=27353, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=36408, PETRI_PLACES=422, PETRI_TRANSITIONS=1721} [2023-08-27 07:21:09,541 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 400 predicate places. [2023-08-27 07:21:09,541 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1721 transitions, 36408 flow [2023-08-27 07:21:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 55.03846153846154) internal successors, (1431), 26 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:09,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:21:09,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:21:09,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 07:21:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:09,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:21:09,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:21:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash -139754733, now seen corresponding path program 7 times [2023-08-27 07:21:09,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:21:09,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168751383] [2023-08-27 07:21:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:21:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:21:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:11,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:21:11,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168751383] [2023-08-27 07:21:11,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168751383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:21:11,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689509913] [2023-08-27 07:21:11,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:21:11,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:11,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:21:11,042 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) [2023-08-27 07:21:11,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 07:21:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:11,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 07:21:11,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:21:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:11,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:21:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689509913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:21:13,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:21:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-27 07:21:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730393928] [2023-08-27 07:21:13,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:21:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:21:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:21:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:21:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:21:13,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:21:13,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1721 transitions, 36408 flow. Second operand has 25 states, 25 states have (on average 55.12) internal successors, (1378), 25 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:13,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:21:13,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:21:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:33,742 INFO L124 PetriNetUnfolderBase]: 4842/8492 cut-off events. [2023-08-27 07:21:33,743 INFO L125 PetriNetUnfolderBase]: For 108948/108948 co-relation queries the response was YES. [2023-08-27 07:21:33,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72333 conditions, 8492 events. 4842/8492 cut-off events. For 108948/108948 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 61537 event pairs, 6 based on Foata normal form. 21/8513 useless extension candidates. Maximal degree in co-relation 72116. Up to 2925 conditions per place. [2023-08-27 07:21:33,831 INFO L140 encePairwiseOnDemand]: 141/151 looper letters, 693 selfloop transitions, 1543 changer transitions 128/2364 dead transitions. [2023-08-27 07:21:33,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2364 transitions, 52114 flow [2023-08-27 07:21:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-27 07:21:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-27 07:21:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3573 transitions. [2023-08-27 07:21:33,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38164922025208287 [2023-08-27 07:21:33,836 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3573 transitions. [2023-08-27 07:21:33,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3573 transitions. [2023-08-27 07:21:33,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:21:33,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3573 transitions. [2023-08-27 07:21:33,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 57.62903225806452) internal successors, (3573), 62 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:33,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 151.0) internal successors, (9513), 63 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:33,849 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 151.0) internal successors, (9513), 63 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:33,849 INFO L175 Difference]: Start difference. First operand has 422 places, 1721 transitions, 36408 flow. Second operand 62 states and 3573 transitions. [2023-08-27 07:21:33,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2364 transitions, 52114 flow [2023-08-27 07:21:36,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2364 transitions, 51677 flow, removed 206 selfloop flow, removed 13 redundant places. [2023-08-27 07:21:36,074 INFO L231 Difference]: Finished difference. Result has 486 places, 2046 transitions, 48481 flow [2023-08-27 07:21:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=36087, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=48481, PETRI_PLACES=486, PETRI_TRANSITIONS=2046} [2023-08-27 07:21:36,076 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 464 predicate places. [2023-08-27 07:21:36,076 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2046 transitions, 48481 flow [2023-08-27 07:21:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.12) internal successors, (1378), 25 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:21:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:21:36,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 07:21:36,288 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,SelfDestructingSolverStorable9 [2023-08-27 07:21:36,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:21:36,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:21:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 887492930, now seen corresponding path program 8 times [2023-08-27 07:21:36,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:21:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447878733] [2023-08-27 07:21:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:21:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:21:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:21:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447878733] [2023-08-27 07:21:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447878733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:21:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426552406] [2023-08-27 07:21:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:21:37,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:21:37,312 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) [2023-08-27 07:21:37,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 07:21:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:21:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:21:37,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 07:21:37,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:21:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:38,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:21:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426552406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:21:40,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:21:40,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-08-27 07:21:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814581843] [2023-08-27 07:21:40,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:21:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 07:21:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:21:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 07:21:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-08-27 07:21:40,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:21:40,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2046 transitions, 48481 flow. Second operand has 32 states, 32 states have (on average 54.84375) internal successors, (1755), 32 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:40,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:21:40,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:21:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:54,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:21:57,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:22:04,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:22:12,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:22:35,552 INFO L124 PetriNetUnfolderBase]: 5513/9673 cut-off events. [2023-08-27 07:22:35,552 INFO L125 PetriNetUnfolderBase]: For 166225/166225 co-relation queries the response was YES. [2023-08-27 07:22:35,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88991 conditions, 9673 events. 5513/9673 cut-off events. For 166225/166225 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 71044 event pairs, 1 based on Foata normal form. 27/9700 useless extension candidates. Maximal degree in co-relation 88740. Up to 2966 conditions per place. [2023-08-27 07:22:35,652 INFO L140 encePairwiseOnDemand]: 142/151 looper letters, 292 selfloop transitions, 2216 changer transitions 190/2698 dead transitions. [2023-08-27 07:22:35,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2698 transitions, 65131 flow [2023-08-27 07:22:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-27 07:22:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-27 07:22:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4841 transitions. [2023-08-27 07:22:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816619362976979 [2023-08-27 07:22:35,657 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4841 transitions. [2023-08-27 07:22:35,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4841 transitions. [2023-08-27 07:22:35,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:22:35,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4841 transitions. [2023-08-27 07:22:35,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 57.63095238095238) internal successors, (4841), 84 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:35,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 151.0) internal successors, (12835), 85 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:35,674 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 151.0) internal successors, (12835), 85 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:35,674 INFO L175 Difference]: Start difference. First operand has 486 places, 2046 transitions, 48481 flow. Second operand 84 states and 4841 transitions. [2023-08-27 07:22:35,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2698 transitions, 65131 flow [2023-08-27 07:22:39,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2698 transitions, 64897 flow, removed 101 selfloop flow, removed 17 redundant places. [2023-08-27 07:22:39,481 INFO L231 Difference]: Finished difference. Result has 556 places, 2374 transitions, 60788 flow [2023-08-27 07:22:39,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=48303, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=60788, PETRI_PLACES=556, PETRI_TRANSITIONS=2374} [2023-08-27 07:22:39,483 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 534 predicate places. [2023-08-27 07:22:39,483 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 2374 transitions, 60788 flow [2023-08-27 07:22:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.84375) internal successors, (1755), 32 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:39,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:22:39,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:22:39,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 07:22:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:22:39,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:22:39,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:22:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1365415886, now seen corresponding path program 9 times [2023-08-27 07:22:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:22:39,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549569287] [2023-08-27 07:22:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:22:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:22:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:22:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:22:40,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:22:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549569287] [2023-08-27 07:22:40,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549569287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:22:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818763339] [2023-08-27 07:22:40,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:22:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:22:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:22:40,325 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) [2023-08-27 07:22:40,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 07:22:40,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 07:22:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:22:40,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:22:40,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:22:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:22:40,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:22:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:22:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818763339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:22:42,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:22:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-27 07:22:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71150276] [2023-08-27 07:22:42,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:22:42,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 07:22:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:22:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 07:22:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2023-08-27 07:22:42,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:22:42,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2374 transitions, 60788 flow. Second operand has 30 states, 30 states have (on average 56.96666666666667) internal successors, (1709), 30 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:42,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:22:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:22:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:12,769 INFO L124 PetriNetUnfolderBase]: 7456/13153 cut-off events. [2023-08-27 07:23:12,769 INFO L125 PetriNetUnfolderBase]: For 252172/252172 co-relation queries the response was YES. [2023-08-27 07:23:12,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128672 conditions, 13153 events. 7456/13153 cut-off events. For 252172/252172 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 101552 event pairs, 11 based on Foata normal form. 48/13201 useless extension candidates. Maximal degree in co-relation 128370. Up to 3150 conditions per place. [2023-08-27 07:23:13,019 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 688 selfloop transitions, 2754 changer transitions 269/3711 dead transitions. [2023-08-27 07:23:13,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 3711 transitions, 95331 flow [2023-08-27 07:23:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-08-27 07:23:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-08-27 07:23:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 6635 transitions. [2023-08-27 07:23:13,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39945815773630344 [2023-08-27 07:23:13,028 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 6635 transitions. [2023-08-27 07:23:13,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 6635 transitions. [2023-08-27 07:23:13,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:13,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 6635 transitions. [2023-08-27 07:23:13,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 60.31818181818182) internal successors, (6635), 110 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:13,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:13,055 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:13,055 INFO L175 Difference]: Start difference. First operand has 556 places, 2374 transitions, 60788 flow. Second operand 110 states and 6635 transitions. [2023-08-27 07:23:13,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 3711 transitions, 95331 flow [2023-08-27 07:23:18,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3711 transitions, 94354 flow, removed 465 selfloop flow, removed 16 redundant places. [2023-08-27 07:23:18,788 INFO L231 Difference]: Finished difference. Result has 671 places, 3174 transitions, 89011 flow [2023-08-27 07:23:18,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=60159, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=89011, PETRI_PLACES=671, PETRI_TRANSITIONS=3174} [2023-08-27 07:23:18,790 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 649 predicate places. [2023-08-27 07:23:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 3174 transitions, 89011 flow [2023-08-27 07:23:18,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.96666666666667) internal successors, (1709), 30 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:18,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:18,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:18,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:18,991 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,SelfDestructingSolverStorable11 [2023-08-27 07:23:18,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:23:18,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash -437292452, now seen corresponding path program 10 times [2023-08-27 07:23:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14276369] [2023-08-27 07:23:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:23:19,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14276369] [2023-08-27 07:23:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14276369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54178292] [2023-08-27 07:23:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:23:19,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:19,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:19,237 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) [2023-08-27 07:23:19,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 07:23:19,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:23:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:19,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 07:23:19,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:19,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:23:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54178292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:19,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:19,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 13 [2023-08-27 07:23:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066890622] [2023-08-27 07:23:19,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 07:23:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 07:23:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:23:19,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 151 [2023-08-27 07:23:19,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 3174 transitions, 89011 flow. Second operand has 13 states, 13 states have (on average 62.07692307692308) internal successors, (807), 13 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:19,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:19,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 151 [2023-08-27 07:23:19,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:31,756 INFO L124 PetriNetUnfolderBase]: 9029/15692 cut-off events. [2023-08-27 07:23:31,756 INFO L125 PetriNetUnfolderBase]: For 367270/367270 co-relation queries the response was YES. [2023-08-27 07:23:31,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169423 conditions, 15692 events. 9029/15692 cut-off events. For 367270/367270 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 123460 event pairs, 67 based on Foata normal form. 26/15718 useless extension candidates. Maximal degree in co-relation 169108. Up to 4058 conditions per place. [2023-08-27 07:23:31,967 INFO L140 encePairwiseOnDemand]: 144/151 looper letters, 1134 selfloop transitions, 3174 changer transitions 3/4311 dead transitions. [2023-08-27 07:23:31,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 4311 transitions, 127973 flow [2023-08-27 07:23:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 07:23:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 07:23:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1510 transitions. [2023-08-27 07:23:31,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-08-27 07:23:31,969 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1510 transitions. [2023-08-27 07:23:31,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1510 transitions. [2023-08-27 07:23:31,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:31,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1510 transitions. [2023-08-27 07:23:31,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.65217391304348) internal successors, (1510), 23 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:31,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:31,973 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:31,973 INFO L175 Difference]: Start difference. First operand has 671 places, 3174 transitions, 89011 flow. Second operand 23 states and 1510 transitions. [2023-08-27 07:23:31,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 4311 transitions, 127973 flow [2023-08-27 07:23:41,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 4311 transitions, 123773 flow, removed 908 selfloop flow, removed 42 redundant places. [2023-08-27 07:23:41,659 INFO L231 Difference]: Finished difference. Result has 632 places, 4017 transitions, 121195 flow [2023-08-27 07:23:41,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=85990, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=121195, PETRI_PLACES=632, PETRI_TRANSITIONS=4017} [2023-08-27 07:23:41,662 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 610 predicate places. [2023-08-27 07:23:41,663 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 4017 transitions, 121195 flow [2023-08-27 07:23:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.07692307692308) internal successors, (807), 13 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:41,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:41,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:41,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:41,863 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,SelfDestructingSolverStorable12 [2023-08-27 07:23:41,864 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:23:41,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 569665612, now seen corresponding path program 11 times [2023-08-27 07:23:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503460696] [2023-08-27 07:23:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503460696] [2023-08-27 07:23:42,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503460696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:42,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998353712] [2023-08-27 07:23:42,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:23:42,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:42,845 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) [2023-08-27 07:23:42,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 07:23:43,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 07:23:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:43,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 07:23:43,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:44,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998353712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:46,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:46,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-27 07:23:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318942683] [2023-08-27 07:23:46,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 07:23:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 07:23:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 07:23:46,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:23:46,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 4017 transitions, 121195 flow. Second operand has 34 states, 34 states have (on average 54.85294117647059) internal successors, (1865), 34 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:46,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:46,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:23:46,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:24:47,788 WARN L234 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 127 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:24:58,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:25:00,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:25:02,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:25:20,032 INFO L124 PetriNetUnfolderBase]: 11304/19665 cut-off events. [2023-08-27 07:25:20,033 INFO L125 PetriNetUnfolderBase]: For 480662/480662 co-relation queries the response was YES. [2023-08-27 07:25:20,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220728 conditions, 19665 events. 11304/19665 cut-off events. For 480662/480662 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 159558 event pairs, 24 based on Foata normal form. 16/19681 useless extension candidates. Maximal degree in co-relation 220302. Up to 4992 conditions per place. [2023-08-27 07:25:20,286 INFO L140 encePairwiseOnDemand]: 140/151 looper letters, 439 selfloop transitions, 4862 changer transitions 71/5372 dead transitions. [2023-08-27 07:25:20,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 5372 transitions, 164166 flow [2023-08-27 07:25:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-27 07:25:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-27 07:25:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 6713 transitions. [2023-08-27 07:25:20,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38324960036538025 [2023-08-27 07:25:20,291 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 6713 transitions. [2023-08-27 07:25:20,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 6713 transitions. [2023-08-27 07:25:20,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:25:20,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 6713 transitions. [2023-08-27 07:25:20,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 57.87068965517241) internal successors, (6713), 116 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:20,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 151.0) internal successors, (17667), 117 states have internal predecessors, (17667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:20,313 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 151.0) internal successors, (17667), 117 states have internal predecessors, (17667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:20,313 INFO L175 Difference]: Start difference. First operand has 632 places, 4017 transitions, 121195 flow. Second operand 116 states and 6713 transitions. [2023-08-27 07:25:20,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 5372 transitions, 164166 flow [2023-08-27 07:25:35,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 5372 transitions, 161159 flow, removed 785 selfloop flow, removed 8 redundant places. [2023-08-27 07:25:35,447 INFO L231 Difference]: Finished difference. Result has 770 places, 5090 transitions, 162663 flow [2023-08-27 07:25:35,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=118886, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=162663, PETRI_PLACES=770, PETRI_TRANSITIONS=5090} [2023-08-27 07:25:35,452 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 748 predicate places. [2023-08-27 07:25:35,452 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 5090 transitions, 162663 flow [2023-08-27 07:25:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 54.85294117647059) internal successors, (1865), 34 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:35,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:25:35,452 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:25:35,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 07:25:35,657 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,SelfDestructingSolverStorable13 [2023-08-27 07:25:35,658 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:25:35,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:25:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1946269154, now seen corresponding path program 12 times [2023-08-27 07:25:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:25:35,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523488780] [2023-08-27 07:25:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:25:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:25:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:25:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:25:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523488780] [2023-08-27 07:25:37,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523488780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:25:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751232524] [2023-08-27 07:25:37,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:25:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:25:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:25:37,219 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) [2023-08-27 07:25:37,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 07:25:37,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 07:25:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:25:37,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:25:37,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:25:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:38,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:25:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751232524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:25:40,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:25:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-27 07:25:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977411018] [2023-08-27 07:25:40,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:25:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 07:25:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:25:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 07:25:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2023-08-27 07:25:40,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 151 [2023-08-27 07:25:40,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 5090 transitions, 162663 flow. Second operand has 29 states, 29 states have (on average 55.03448275862069) internal successors, (1596), 29 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:40,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:25:40,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 151 [2023-08-27 07:25:40,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:27:07,269 INFO L124 PetriNetUnfolderBase]: 13293/23246 cut-off events. [2023-08-27 07:27:07,270 INFO L125 PetriNetUnfolderBase]: For 611015/611015 co-relation queries the response was YES. [2023-08-27 07:27:07,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282348 conditions, 23246 events. 13293/23246 cut-off events. For 611015/611015 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 195064 event pairs, 164 based on Foata normal form. 36/23282 useless extension candidates. Maximal degree in co-relation 281865. Up to 5786 conditions per place. [2023-08-27 07:27:07,735 INFO L140 encePairwiseOnDemand]: 140/151 looper letters, 1754 selfloop transitions, 4591 changer transitions 173/6518 dead transitions. [2023-08-27 07:27:07,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 6518 transitions, 214601 flow [2023-08-27 07:27:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-27 07:27:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-27 07:27:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6408 transitions. [2023-08-27 07:27:07,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37890255439924314 [2023-08-27 07:27:07,740 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6408 transitions. [2023-08-27 07:27:07,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6408 transitions. [2023-08-27 07:27:07,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:27:07,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6408 transitions. [2023-08-27 07:27:07,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 57.214285714285715) internal successors, (6408), 112 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:07,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 151.0) internal successors, (17063), 113 states have internal predecessors, (17063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:07,760 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 151.0) internal successors, (17063), 113 states have internal predecessors, (17063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:07,760 INFO L175 Difference]: Start difference. First operand has 770 places, 5090 transitions, 162663 flow. Second operand 112 states and 6408 transitions. [2023-08-27 07:27:07,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 6518 transitions, 214601 flow [2023-08-27 07:27:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 6518 transitions, 211264 flow, removed 926 selfloop flow, removed 36 redundant places. [2023-08-27 07:27:36,170 INFO L231 Difference]: Finished difference. Result has 894 places, 6055 transitions, 203438 flow [2023-08-27 07:27:36,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=160081, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=203438, PETRI_PLACES=894, PETRI_TRANSITIONS=6055} [2023-08-27 07:27:36,174 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 872 predicate places. [2023-08-27 07:27:36,174 INFO L495 AbstractCegarLoop]: Abstraction has has 894 places, 6055 transitions, 203438 flow [2023-08-27 07:27:36,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 55.03448275862069) internal successors, (1596), 29 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:36,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:27:36,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:27:36,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 07:27:36,375 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,SelfDestructingSolverStorable14 [2023-08-27 07:27:36,375 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:27:36,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:27:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -617571734, now seen corresponding path program 13 times [2023-08-27 07:27:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:27:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870438084] [2023-08-27 07:27:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:27:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:27:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:27:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:27:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:27:37,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870438084] [2023-08-27 07:27:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870438084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:27:37,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333133468] [2023-08-27 07:27:37,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:27:37,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:27:37,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:27:37,384 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) [2023-08-27 07:27:37,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 07:27:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:27:37,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 07:27:37,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:27:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:27:38,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:27:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:27:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333133468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:27:40,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:27:40,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-08-27 07:27:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85783219] [2023-08-27 07:27:40,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:27:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 07:27:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:27:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 07:27:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-08-27 07:27:40,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:27:40,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 894 places, 6055 transitions, 203438 flow. Second operand has 32 states, 32 states have (on average 56.84375) internal successors, (1819), 32 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:40,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:27:40,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:27:40,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:28:55,760 INFO L124 PetriNetUnfolderBase]: 14185/24783 cut-off events. [2023-08-27 07:28:55,760 INFO L125 PetriNetUnfolderBase]: For 746564/746564 co-relation queries the response was YES. [2023-08-27 07:28:56,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316191 conditions, 24783 events. 14185/24783 cut-off events. For 746564/746564 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 209766 event pairs, 45 based on Foata normal form. 39/24822 useless extension candidates. Maximal degree in co-relation 315751. Up to 9623 conditions per place. [2023-08-27 07:28:56,337 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 2079 selfloop transitions, 4650 changer transitions 152/6881 dead transitions. [2023-08-27 07:28:56,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 6881 transitions, 238734 flow [2023-08-27 07:28:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-27 07:28:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-27 07:28:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4652 transitions. [2023-08-27 07:28:56,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949736797418917 [2023-08-27 07:28:56,342 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4652 transitions. [2023-08-27 07:28:56,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4652 transitions. [2023-08-27 07:28:56,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:28:56,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4652 transitions. [2023-08-27 07:28:56,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 59.64102564102564) internal successors, (4652), 78 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:28:56,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 151.0) internal successors, (11929), 79 states have internal predecessors, (11929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:28:56,355 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 151.0) internal successors, (11929), 79 states have internal predecessors, (11929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:28:56,356 INFO L175 Difference]: Start difference. First operand has 894 places, 6055 transitions, 203438 flow. Second operand 78 states and 4652 transitions. [2023-08-27 07:28:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 6881 transitions, 238734 flow [2023-08-27 07:29:32,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 6881 transitions, 237191 flow, removed 428 selfloop flow, removed 30 redundant places. [2023-08-27 07:29:33,012 INFO L231 Difference]: Finished difference. Result has 959 places, 6481 transitions, 231286 flow [2023-08-27 07:29:33,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=202087, PETRI_DIFFERENCE_MINUEND_PLACES=845, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=231286, PETRI_PLACES=959, PETRI_TRANSITIONS=6481} [2023-08-27 07:29:33,017 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 937 predicate places. [2023-08-27 07:29:33,017 INFO L495 AbstractCegarLoop]: Abstraction has has 959 places, 6481 transitions, 231286 flow [2023-08-27 07:29:33,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 56.84375) internal successors, (1819), 32 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:29:33,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:29:33,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:29:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 07:29:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:29:33,219 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:29:33,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:29:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1193096658, now seen corresponding path program 14 times [2023-08-27 07:29:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:29:33,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176461105] [2023-08-27 07:29:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:29:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:29:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:29:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:29:33,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:29:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176461105] [2023-08-27 07:29:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176461105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:29:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662874142] [2023-08-27 07:29:33,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:29:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:29:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:29:33,901 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) [2023-08-27 07:29:33,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:29:34,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:29:34,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:29:34,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 07:29:34,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:29:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:29:35,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:29:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:29:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662874142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:29:35,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:29:35,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-27 07:29:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360177916] [2023-08-27 07:29:35,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:29:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 07:29:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:29:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 07:29:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-08-27 07:29:35,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 151 [2023-08-27 07:29:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 6481 transitions, 231286 flow. Second operand has 29 states, 29 states have (on average 57.03448275862069) internal successors, (1654), 29 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:29:35,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:29:35,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 151 [2023-08-27 07:29:35,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:30:44,978 INFO L124 PetriNetUnfolderBase]: 14912/26137 cut-off events. [2023-08-27 07:30:44,978 INFO L125 PetriNetUnfolderBase]: For 932874/932874 co-relation queries the response was YES. [2023-08-27 07:30:45,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347757 conditions, 26137 events. 14912/26137 cut-off events. For 932874/932874 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 224083 event pairs, 27 based on Foata normal form. 44/26181 useless extension candidates. Maximal degree in co-relation 347312. Up to 10749 conditions per place. [2023-08-27 07:30:45,621 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 2141 selfloop transitions, 4772 changer transitions 286/7199 dead transitions. [2023-08-27 07:30:45,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1011 places, 7199 transitions, 265986 flow [2023-08-27 07:30:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-27 07:30:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-27 07:30:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3854 transitions. [2023-08-27 07:30:45,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987996688741722 [2023-08-27 07:30:45,624 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3854 transitions. [2023-08-27 07:30:45,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3854 transitions. [2023-08-27 07:30:45,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:30:45,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3854 transitions. [2023-08-27 07:30:45,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 60.21875) internal successors, (3854), 64 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:30:45,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:30:45,635 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:30:45,635 INFO L175 Difference]: Start difference. First operand has 959 places, 6481 transitions, 231286 flow. Second operand 64 states and 3854 transitions. [2023-08-27 07:30:45,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1011 places, 7199 transitions, 265986 flow [2023-08-27 07:31:28,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 7199 transitions, 265235 flow, removed 228 selfloop flow, removed 25 redundant places. [2023-08-27 07:31:28,381 INFO L231 Difference]: Finished difference. Result has 1015 places, 6701 transitions, 258568 flow [2023-08-27 07:31:28,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=230628, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=258568, PETRI_PLACES=1015, PETRI_TRANSITIONS=6701} [2023-08-27 07:31:28,386 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 993 predicate places. [2023-08-27 07:31:28,386 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 6701 transitions, 258568 flow [2023-08-27 07:31:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 57.03448275862069) internal successors, (1654), 29 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:28,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:31:28,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:31:28,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 07:31:28,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 07:31:28,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:31:28,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:31:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 312211854, now seen corresponding path program 15 times [2023-08-27 07:31:28,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:31:28,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798460493] [2023-08-27 07:31:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:28,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:31:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:31:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:31:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798460493] [2023-08-27 07:31:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798460493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:31:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416383024] [2023-08-27 07:31:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:31:28,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:31:28,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:31:28,950 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) [2023-08-27 07:31:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:31:29,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:31:29,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:31:29,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 07:31:29,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:31:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:31:30,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:31:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:31:33,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416383024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:31:33,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:31:33,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-27 07:31:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645102281] [2023-08-27 07:31:33,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:31:33,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:31:33,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:31:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:31:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2023-08-27 07:31:33,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 151 [2023-08-27 07:31:33,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 6701 transitions, 258568 flow. Second operand has 19 states, 19 states have (on average 59.578947368421055) internal successors, (1132), 19 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:33,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:31:33,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 151 [2023-08-27 07:31:33,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 07:31:36,603 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 07:31:36,614 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 07:31:37,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:31:37,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 07:31:37,717 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2023-08-27 07:31:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 07:31:37,717 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-27 07:31:37,718 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-27 07:31:37,718 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-27 07:31:37,719 INFO L445 BasicCegarLoop]: Path program histogram: [15, 2, 1] [2023-08-27 07:31:37,721 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 07:31:37,721 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 07:31:37,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:31:37 BasicIcfg [2023-08-27 07:31:37,723 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 07:31:37,724 INFO L158 Benchmark]: Toolchain (without parser) took 822189.10ms. Allocated memory was 388.0MB in the beginning and 6.5GB in the end (delta: 6.1GB). Free memory was 364.2MB in the beginning and 1.9GB in the end (delta: -1.5GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-08-27 07:31:37,724 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 388.0MB. Free memory is still 364.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 07:31:37,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.10ms. Allocated memory is still 388.0MB. Free memory was 364.2MB in the beginning and 353.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 07:31:37,724 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.45ms. Allocated memory is still 388.0MB. Free memory was 353.0MB in the beginning and 351.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:31:37,724 INFO L158 Benchmark]: Boogie Preprocessor took 32.89ms. Allocated memory is still 388.0MB. Free memory was 351.4MB in the beginning and 350.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:31:37,725 INFO L158 Benchmark]: RCFGBuilder took 478.62ms. Allocated memory is still 388.0MB. Free memory was 349.8MB in the beginning and 334.6MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 07:31:37,725 INFO L158 Benchmark]: TraceAbstraction took 821360.04ms. Allocated memory was 388.0MB in the beginning and 6.5GB in the end (delta: 6.1GB). Free memory was 334.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-08-27 07:31:37,726 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 388.0MB. Free memory is still 364.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 274.10ms. Allocated memory is still 388.0MB. Free memory was 364.2MB in the beginning and 353.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.45ms. Allocated memory is still 388.0MB. Free memory was 353.0MB in the beginning and 351.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.89ms. Allocated memory is still 388.0MB. Free memory was 351.4MB in the beginning and 350.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 478.62ms. Allocated memory is still 388.0MB. Free memory was 349.8MB in the beginning and 334.6MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 821360.04ms. Allocated memory was 388.0MB in the beginning and 6.5GB in the end (delta: 6.1GB). Free memory was 334.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 74 PlacesBefore, 22 PlacesAfterwards, 73 TransitionsBefore, 17 TransitionsAfterwards, 396 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 67 TotalNumberOfCompositions, 617 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 491, independent: 466, independent conditional: 0, independent unconditional: 466, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 211, independent: 207, independent conditional: 0, independent unconditional: 207, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 491, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 211, unknown conditional: 0, unknown unconditional: 211] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 821.3s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 758.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 5216 SdHoareTripleChecker+Valid, 101.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5216 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 97.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 1314 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21247 IncrementalHoareTripleChecker+Invalid, 22567 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1314 mSolverCounterUnsat, 0 mSDtfsCounter, 21247 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1642 GetRequests, 345 SyntacticMatches, 22 SemanticMatches, 1275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39596 ImplicationChecksByTransitivity, 356.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=258568occurred in iteration=17, InterpolantAutomatonStates: 1087, 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: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 54.5s InterpolantComputationTime, 662 NumberOfCodeBlocks, 662 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 928 ConstructedInterpolants, 0 QuantifiedInterpolants, 40187 SizeOfPredicates, 159 NumberOfNonLiveVariables, 2128 ConjunctsInSsa, 481 ConjunctsInUnsatCore, 50 InterpolantComputations, 2 PerfectInterpolantSequences, 20/322 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown