/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:29:44,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:29:44,312 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 [2023-08-24 14:29:44,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:29:44,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:29:44,340 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:29:44,343 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:29:44,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:29:44,344 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:29:44,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:29:44,345 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:29:44,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:29:44,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:29:44,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:29:44,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:29:44,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:29:44,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:29:44,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:29:44,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:29:44,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:29:44,348 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:29:44,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:29:44,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:29:44,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:29:44,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:29:44,349 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:29:44,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:29:44,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:29:44,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:29:44,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:29:44,350 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:29:44,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:29:44,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:29:44,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:29:44,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:29:44,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:29:44,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:29:44,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:29:44,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:29:44,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:29:44,689 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:29:44,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-24 14:29:45,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:29:45,985 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:29:45,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-24 14:29:45,991 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b524fdb1/6c12558b4fbf413491b35d29636ed564/FLAG1639f5a35 [2023-08-24 14:29:46,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b524fdb1/6c12558b4fbf413491b35d29636ed564 [2023-08-24 14:29:46,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:29:46,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:29:46,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:29:46,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:29:46,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:29:46,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5929d116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46, skipping insertion in model container [2023-08-24 14:29:46,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,028 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:29:46,209 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-08-24 14:29:46,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:29:46,219 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:29:46,251 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-08-24 14:29:46,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:29:46,262 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:29:46,265 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:29:46,271 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:29:46,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46 WrapperNode [2023-08-24 14:29:46,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:29:46,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:29:46,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:29:46,275 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:29:46,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,294 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,316 INFO L138 Inliner]: procedures = 20, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2023-08-24 14:29:46,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:29:46,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:29:46,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:29:46,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:29:46,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:29:46,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:29:46,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:29:46,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:29:46,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:29:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:46,389 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) [2023-08-24 14:29:46,413 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 [2023-08-24 14:29:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:29:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:29:46,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:29:46,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:29:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:29:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:29:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:29:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:29:46,434 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:29:46,544 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:29:46,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:29:46,743 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:29:46,762 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:29:46,762 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 14:29:46,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:29:46 BoogieIcfgContainer [2023-08-24 14:29:46,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:29:46,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:29:46,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:29:46,774 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:29:46,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:29:46" (1/3) ... [2023-08-24 14:29:46,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ee0015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:29:46, skipping insertion in model container [2023-08-24 14:29:46,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46" (2/3) ... [2023-08-24 14:29:46,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ee0015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:29:46, skipping insertion in model container [2023-08-24 14:29:46,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:29:46" (3/3) ... [2023-08-24 14:29:46,777 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2-unrolled.wvr.c [2023-08-24 14:29:46,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:29:46,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:29:46,789 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:29:46,850 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 14:29:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-08-24 14:29:46,930 INFO L124 PetriNetUnfolderBase]: 6/93 cut-off events. [2023-08-24 14:29:46,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:46,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-24 14:29:46,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-08-24 14:29:46,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-08-24 14:29:46,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:29:46,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-24 14:29:46,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-24 14:29:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-08-24 14:29:46,988 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 14:29:46,988 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-24 14:29:46,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-08-24 14:29:49,141 INFO L134 LiptonReduction]: Checked pairs total: 869 [2023-08-24 14:29:49,141 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-24 14:29:49,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:29:49,157 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;@6f3a37c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:29:49,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 14:29:49,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:29:49,162 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 14:29:49,162 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:49,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:49,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:49,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:49,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1786021943, now seen corresponding path program 1 times [2023-08-24 14:29:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:49,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998747758] [2023-08-24 14:29:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:49,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998747758] [2023-08-24 14:29:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998747758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:49,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:49,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 14:29:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264693361] [2023-08-24 14:29:49,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:49,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-08-24 14:29:49,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:49,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:49,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-08-24 14:29:49,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:49,797 INFO L124 PetriNetUnfolderBase]: 60/110 cut-off events. [2023-08-24 14:29:49,798 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-24 14:29:49,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 110 events. 60/110 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 292 event pairs, 9 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 180. Up to 84 conditions per place. [2023-08-24 14:29:49,801 INFO L140 encePairwiseOnDemand]: 171/175 looper letters, 21 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-24 14:29:49,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-08-24 14:29:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:29:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:29:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-24 14:29:49,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038095238095238 [2023-08-24 14:29:49,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-24 14:29:49,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-24 14:29:49,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:49,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-24 14:29:49,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:49,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:49,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:49,835 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 212 transitions. [2023-08-24 14:29:49,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-08-24 14:29:49,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:29:49,839 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-24 14:29:49,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 14:29:49,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 14:29:49,843 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-24 14:29:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:49,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:49,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:49,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:29:49,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:49,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1638161831, now seen corresponding path program 1 times [2023-08-24 14:29:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126767813] [2023-08-24 14:29:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126767813] [2023-08-24 14:29:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126767813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:50,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 14:29:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117109172] [2023-08-24 14:29:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:50,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:50,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 14:29:50,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:50,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 14:29:50,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:50,221 INFO L124 PetriNetUnfolderBase]: 84/153 cut-off events. [2023-08-24 14:29:50,221 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-24 14:29:50,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 153 events. 84/153 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 447 event pairs, 27 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 82. Up to 84 conditions per place. [2023-08-24 14:29:50,223 INFO L140 encePairwiseOnDemand]: 170/175 looper letters, 19 selfloop transitions, 7 changer transitions 7/33 dead transitions. [2023-08-24 14:29:50,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 33 transitions, 161 flow [2023-08-24 14:29:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:29:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:29:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2023-08-24 14:29:50,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2023-08-24 14:29:50,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2023-08-24 14:29:50,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2023-08-24 14:29:50,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2023-08-24 14:29:50,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,234 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 4 states and 344 transitions. [2023-08-24 14:29:50,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 33 transitions, 161 flow [2023-08-24 14:29:50,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:29:50,236 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 96 flow [2023-08-24 14:29:50,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-24 14:29:50,236 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 14:29:50,237 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 96 flow [2023-08-24 14:29:50,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:50,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:50,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:29:50,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:50,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:50,238 INFO L85 PathProgramCache]: Analyzing trace with hash -237269058, now seen corresponding path program 1 times [2023-08-24 14:29:50,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672306912] [2023-08-24 14:29:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:50,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672306912] [2023-08-24 14:29:50,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672306912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:50,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:50,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:29:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668725900] [2023-08-24 14:29:50,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:50,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:50,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 175 [2023-08-24 14:29:50,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:50,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 175 [2023-08-24 14:29:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:50,433 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2023-08-24 14:29:50,433 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-24 14:29:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 191 events. 104/191 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 9 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 287. Up to 66 conditions per place. [2023-08-24 14:29:50,435 INFO L140 encePairwiseOnDemand]: 168/175 looper letters, 32 selfloop transitions, 9 changer transitions 10/51 dead transitions. [2023-08-24 14:29:50,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 51 transitions, 306 flow [2023-08-24 14:29:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:29:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:29:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2023-08-24 14:29:50,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41942857142857143 [2023-08-24 14:29:50,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2023-08-24 14:29:50,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2023-08-24 14:29:50,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:50,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2023-08-24 14:29:50,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,441 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 96 flow. Second operand 5 states and 367 transitions. [2023-08-24 14:29:50,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 51 transitions, 306 flow [2023-08-24 14:29:50,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 51 transitions, 302 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 14:29:50,443 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 168 flow [2023-08-24 14:29:50,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-24 14:29:50,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-08-24 14:29:50,444 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 168 flow [2023-08-24 14:29:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:50,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:50,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:29:50,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:50,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 599928642, now seen corresponding path program 2 times [2023-08-24 14:29:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303885454] [2023-08-24 14:29:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303885454] [2023-08-24 14:29:50,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303885454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:50,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:50,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:29:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288091680] [2023-08-24 14:29:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:50,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 175 [2023-08-24 14:29:50,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:50,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 175 [2023-08-24 14:29:50,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:50,639 INFO L124 PetriNetUnfolderBase]: 91/169 cut-off events. [2023-08-24 14:29:50,639 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-08-24 14:29:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 169 events. 91/169 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 505 event pairs, 11 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 237. Up to 84 conditions per place. [2023-08-24 14:29:50,645 INFO L140 encePairwiseOnDemand]: 170/175 looper letters, 26 selfloop transitions, 11 changer transitions 1/38 dead transitions. [2023-08-24 14:29:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 286 flow [2023-08-24 14:29:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:29:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:29:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-24 14:29:50,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842857142857143 [2023-08-24 14:29:50,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-24 14:29:50,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-24 14:29:50,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:50,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-24 14:29:50,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,650 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 168 flow. Second operand 4 states and 269 transitions. [2023-08-24 14:29:50,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 286 flow [2023-08-24 14:29:50,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 280 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 14:29:50,657 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 216 flow [2023-08-24 14:29:50,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-08-24 14:29:50,658 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-24 14:29:50,658 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 216 flow [2023-08-24 14:29:50,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:50,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:50,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:50,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:29:50,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:50,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -227819690, now seen corresponding path program 1 times [2023-08-24 14:29:50,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600959084] [2023-08-24 14:29:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600959084] [2023-08-24 14:29:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600959084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621529917] [2023-08-24 14:29:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:50,901 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) [2023-08-24 14:29:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:29:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 14:29:50,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:51,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621529917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:51,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-08-24 14:29:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673599852] [2023-08-24 14:29:51,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:29:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:29:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:29:51,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-08-24 14:29:51,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:51,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-08-24 14:29:51,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:51,284 INFO L124 PetriNetUnfolderBase]: 123/226 cut-off events. [2023-08-24 14:29:51,285 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-24 14:29:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 226 events. 123/226 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 740 event pairs, 16 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 315. Up to 84 conditions per place. [2023-08-24 14:29:51,287 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 26 selfloop transitions, 17 changer transitions 12/55 dead transitions. [2023-08-24 14:29:51,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 470 flow [2023-08-24 14:29:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:29:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:29:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-08-24 14:29:51,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2023-08-24 14:29:51,289 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-08-24 14:29:51,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-08-24 14:29:51,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:51,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-08-24 14:29:51,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,293 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,293 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 216 flow. Second operand 6 states and 413 transitions. [2023-08-24 14:29:51,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 470 flow [2023-08-24 14:29:51,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 14:29:51,297 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 327 flow [2023-08-24 14:29:51,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-24 14:29:51,299 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-24 14:29:51,299 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 327 flow [2023-08-24 14:29:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:51,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:51,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 14:29:51,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:51,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:51,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash -66515524, now seen corresponding path program 2 times [2023-08-24 14:29:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158004479] [2023-08-24 14:29:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158004479] [2023-08-24 14:29:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158004479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207855556] [2023-08-24 14:29:51,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:29:51,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:51,673 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) [2023-08-24 14:29:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:29:51,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:29:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:29:51,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 14:29:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:29:51,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 14:29:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207855556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:51,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 14:29:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-08-24 14:29:51,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783201953] [2023-08-24 14:29:51,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:51,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:29:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:29:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:29:51,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 14:29:51,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:51,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 14:29:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:51,930 INFO L124 PetriNetUnfolderBase]: 140/260 cut-off events. [2023-08-24 14:29:51,931 INFO L125 PetriNetUnfolderBase]: For 942/942 co-relation queries the response was YES. [2023-08-24 14:29:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 260 events. 140/260 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 901 event pairs, 32 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 769. Up to 179 conditions per place. [2023-08-24 14:29:51,933 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 37 selfloop transitions, 17 changer transitions 3/57 dead transitions. [2023-08-24 14:29:51,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 584 flow [2023-08-24 14:29:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:29:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:29:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-08-24 14:29:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342857142857143 [2023-08-24 14:29:51,935 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-08-24 14:29:51,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-08-24 14:29:51,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:51,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-08-24 14:29:51,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,940 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,940 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 327 flow. Second operand 5 states and 423 transitions. [2023-08-24 14:29:51,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 584 flow [2023-08-24 14:29:51,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 534 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-24 14:29:51,945 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 465 flow [2023-08-24 14:29:51,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-24 14:29:51,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-24 14:29:51,947 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 465 flow [2023-08-24 14:29:51,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:51,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:51,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:51,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:29:52,154 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,SelfDestructingSolverStorable5 [2023-08-24 14:29:52,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:52,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1627690428, now seen corresponding path program 3 times [2023-08-24 14:29:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410065120] [2023-08-24 14:29:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410065120] [2023-08-24 14:29:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410065120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531056537] [2023-08-24 14:29:52,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:29:52,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:52,369 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) [2023-08-24 14:29:52,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:29:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 14:29:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:29:52,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 14:29:52,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:52,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531056537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:52,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:52,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-24 14:29:52,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483815256] [2023-08-24 14:29:52,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:52,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:29:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:29:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:29:52,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 14:29:52,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:52,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:52,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 14:29:52,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:52,664 INFO L124 PetriNetUnfolderBase]: 140/259 cut-off events. [2023-08-24 14:29:52,664 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2023-08-24 14:29:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 259 events. 140/259 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 911 event pairs, 38 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 955. Up to 137 conditions per place. [2023-08-24 14:29:52,665 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-24 14:29:52,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 642 flow [2023-08-24 14:29:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:29:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:29:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2023-08-24 14:29:52,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723809523809524 [2023-08-24 14:29:52,668 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2023-08-24 14:29:52,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2023-08-24 14:29:52,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:52,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2023-08-24 14:29:52,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:52,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:52,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:52,671 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 465 flow. Second operand 6 states and 496 transitions. [2023-08-24 14:29:52,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 642 flow [2023-08-24 14:29:52,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 626 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 14:29:52,676 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-24 14:29:52,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-24 14:29:52,676 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-24 14:29:52,676 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-24 14:29:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:52,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 14:29:52,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 14:29:52,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 14:29:52,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 14:29:52,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:52,885 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2023-08-24 14:29:52,888 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 14:29:52,888 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 14:29:52,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:29:52 BasicIcfg [2023-08-24 14:29:52,891 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 14:29:52,892 INFO L158 Benchmark]: Toolchain (without parser) took 6886.15ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 337.5MB in the beginning and 401.4MB in the end (delta: -63.9MB). Peak memory consumption was 253.8MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,892 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 360.7MB. Free memory was 338.9MB in the beginning and 338.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:29:52,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.56ms. Allocated memory is still 360.7MB. Free memory was 337.5MB in the beginning and 326.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,893 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.84ms. Allocated memory is still 360.7MB. Free memory was 326.0MB in the beginning and 324.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,893 INFO L158 Benchmark]: Boogie Preprocessor took 32.24ms. Allocated memory is still 360.7MB. Free memory was 324.5MB in the beginning and 323.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,893 INFO L158 Benchmark]: RCFGBuilder took 412.58ms. Allocated memory is still 360.7MB. Free memory was 323.1MB in the beginning and 308.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,894 INFO L158 Benchmark]: TraceAbstraction took 6125.69ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 307.8MB in the beginning and 401.4MB in the end (delta: -93.6MB). Peak memory consumption was 224.4MB. Max. memory is 16.0GB. [2023-08-24 14:29:52,895 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 360.7MB. Free memory was 338.9MB in the beginning and 338.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 267.56ms. Allocated memory is still 360.7MB. Free memory was 337.5MB in the beginning and 326.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.84ms. Allocated memory is still 360.7MB. Free memory was 326.0MB in the beginning and 324.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.24ms. Allocated memory is still 360.7MB. Free memory was 324.5MB in the beginning and 323.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 412.58ms. Allocated memory is still 360.7MB. Free memory was 323.1MB in the beginning and 308.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 6125.69ms. Allocated memory was 360.7MB in the beginning and 434.1MB in the end (delta: 73.4MB). Free memory was 307.8MB in the beginning and 401.4MB in the end (delta: -93.6MB). Peak memory consumption was 224.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 86 PlacesBefore, 20 PlacesAfterwards, 85 TransitionsBefore, 15 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 80 TotalNumberOfCompositions, 869 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 745, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 401, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 745, independent: 327, independent conditional: 0, independent unconditional: 327, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 401, unknown conditional: 0, unknown unconditional: 401] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, 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 - PositiveResult [Line: 87]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 116 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: 6.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 493 IncrementalHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 493 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=465occurred in iteration=6, InterpolantAutomatonStates: 33, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 1723 SizeOfPredicates, 12 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 9/19 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 14:29:52,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...