/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 00:17:34,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 00:17:35,039 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 00:17:35,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 00:17:35,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 00:17:35,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 00:17:35,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 00:17:35,074 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 00:17:35,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 00:17:35,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 00:17:35,075 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 00:17:35,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 00:17:35,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 00:17:35,076 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 00:17:35,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 00:17:35,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 00:17:35,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 00:17:35,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 00:17:35,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 00:17:35,077 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 00:17:35,077 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 00:17:35,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 00:17:35,080 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 00:17:35,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 00:17:35,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 00:17:35,084 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 00:17:35,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 00:17:35,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 00:17:35,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 00:17:35,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 00:17:35,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 00:17:35,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 00:17:35,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 00:17:35,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 00:17:35,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 00:17:35,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 00:17:35,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 00:17:35,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 00:17:35,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 00:17:35,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 00:17:35,347 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 00:17:35,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-27 00:17:36,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 00:17:36,588 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 00:17:36,589 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-27 00:17:36,595 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ac20130/3716889073af4116b5ad6f69f2536fe3/FLAG74d111ca8 [2023-08-27 00:17:36,608 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ac20130/3716889073af4116b5ad6f69f2536fe3 [2023-08-27 00:17:36,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 00:17:36,613 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 00:17:36,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 00:17:36,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 00:17:36,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 00:17:36,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102da4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36, skipping insertion in model container [2023-08-27 00:17:36,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,637 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 00:17:36,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 00:17:36,787 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 00:17:36,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 00:17:36,822 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 00:17:36,822 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 00:17:36,827 INFO L206 MainTranslator]: Completed translation [2023-08-27 00:17:36,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36 WrapperNode [2023-08-27 00:17:36,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 00:17:36,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 00:17:36,829 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 00:17:36,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 00:17:36,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,865 INFO L138 Inliner]: procedures = 20, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2023-08-27 00:17:36,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 00:17:36,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 00:17:36,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 00:17:36,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 00:17:36,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 00:17:36,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 00:17:36,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 00:17:36,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 00:17:36,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (1/1) ... [2023-08-27 00:17:36,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 00:17:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 00:17:36,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 00:17:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 00:17:37,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 00:17:37,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 00:17:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 00:17:37,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 00:17:37,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 00:17:37,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 00:17:37,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 00:17:37,042 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 00:17:37,113 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 00:17:37,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 00:17:37,296 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 00:17:37,315 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 00:17:37,315 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 00:17:37,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 12:17:37 BoogieIcfgContainer [2023-08-27 00:17:37,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 00:17:37,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 00:17:37,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 00:17:37,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 00:17:37,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 12:17:36" (1/3) ... [2023-08-27 00:17:37,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7967a101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 12:17:37, skipping insertion in model container [2023-08-27 00:17:37,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:17:36" (2/3) ... [2023-08-27 00:17:37,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7967a101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 12:17:37, skipping insertion in model container [2023-08-27 00:17:37,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 12:17:37" (3/3) ... [2023-08-27 00:17:37,324 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2-unrolled.wvr.c [2023-08-27 00:17:37,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 00:17:37,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 00:17:37,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 00:17:37,382 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 00:17:37,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 96 transitions, 208 flow [2023-08-27 00:17:37,451 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-08-27 00:17:37,451 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 00:17:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 94 events. 6/94 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. 0/87 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-27 00:17:37,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 96 transitions, 208 flow [2023-08-27 00:17:37,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-08-27 00:17:37,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 00:17:37,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-27 00:17:37,470 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-27 00:17:37,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-08-27 00:17:37,491 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-27 00:17:37,491 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 00:17:37,492 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. [2023-08-27 00:17:37,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-08-27 00:17:39,305 INFO L134 LiptonReduction]: Checked pairs total: 899 [2023-08-27 00:17:39,306 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-27 00:17:39,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 00:17:39,322 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;@62bf63d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 00:17:39,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-27 00:17:39,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 00:17:39,325 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-27 00:17:39,325 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 00:17:39,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:39,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:39,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:39,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1823852857, now seen corresponding path program 1 times [2023-08-27 00:17:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277718723] [2023-08-27 00:17:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 00:17:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:39,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277718723] [2023-08-27 00:17:39,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277718723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 00:17:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 00:17:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 00:17:39,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783923029] [2023-08-27 00:17:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 00:17:39,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 00:17:39,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 00:17:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 00:17:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-08-27 00:17:39,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:39,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-08-27 00:17:39,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:39,775 INFO L124 PetriNetUnfolderBase]: 60/110 cut-off events. [2023-08-27 00:17:39,775 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 00:17:39,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 110 events. 60/110 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 293 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. [2023-08-27 00:17:39,777 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 21 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-27 00:17:39,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-08-27 00:17:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 00:17:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 00:17:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-27 00:17:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038314176245211 [2023-08-27 00:17:39,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-27 00:17:39,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-27 00:17:39,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:39,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-27 00:17:39,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,796 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 263 transitions. [2023-08-27 00:17:39,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-08-27 00:17:39,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 00:17:39,799 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-27 00:17:39,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, 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} [2023-08-27 00:17:39,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-27 00:17:39,803 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-27 00:17:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:39,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:39,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 00:17:39,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:39,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1575003336, now seen corresponding path program 1 times [2023-08-27 00:17:39,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:39,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637747923] [2023-08-27 00:17:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 00:17:39,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637747923] [2023-08-27 00:17:39,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637747923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 00:17:39,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 00:17:39,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 00:17:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811511908] [2023-08-27 00:17:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 00:17:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 00:17:39,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 00:17:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 00:17:39,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 174 [2023-08-27 00:17:39,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:39,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:39,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 174 [2023-08-27 00:17:39,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:39,996 INFO L124 PetriNetUnfolderBase]: 87/165 cut-off events. [2023-08-27 00:17:39,996 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-27 00:17:39,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 165 events. 87/165 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 544 event pairs, 11 based on Foata normal form. 8/173 useless extension candidates. Maximal degree in co-relation 203. Up to 80 conditions per place. [2023-08-27 00:17:39,998 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 30 selfloop transitions, 3 changer transitions 2/35 dead transitions. [2023-08-27 00:17:39,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 35 transitions, 169 flow [2023-08-27 00:17:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 00:17:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 00:17:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2023-08-27 00:17:40,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46264367816091956 [2023-08-27 00:17:40,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:40,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,009 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,009 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 4 states and 322 transitions. [2023-08-27 00:17:40,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 35 transitions, 169 flow [2023-08-27 00:17:40,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 35 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 00:17:40,010 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 72 flow [2023-08-27 00:17:40,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-27 00:17:40,011 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-27 00:17:40,011 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 72 flow [2023-08-27 00:17:40,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:40,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:40,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 00:17:40,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:40,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1346407150, now seen corresponding path program 1 times [2023-08-27 00:17:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:40,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503471076] [2023-08-27 00:17:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:40,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:40,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503471076] [2023-08-27 00:17:40,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503471076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 00:17:40,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 00:17:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 00:17:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505857777] [2023-08-27 00:17:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 00:17:40,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 00:17:40,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 00:17:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 00:17:40,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-08-27 00:17:40,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:40,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-08-27 00:17:40,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:40,194 INFO L124 PetriNetUnfolderBase]: 115/214 cut-off events. [2023-08-27 00:17:40,194 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-27 00:17:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 214 events. 115/214 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 695 event pairs, 31 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 292. Up to 127 conditions per place. [2023-08-27 00:17:40,196 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 23 selfloop transitions, 8 changer transitions 4/35 dead transitions. [2023-08-27 00:17:40,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 35 transitions, 198 flow [2023-08-27 00:17:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 00:17:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 00:17:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-08-27 00:17:40,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49712643678160917 [2023-08-27 00:17:40,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-08-27 00:17:40,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-08-27 00:17:40,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:40,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-08-27 00:17:40,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,199 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,200 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 72 flow. Second operand 4 states and 346 transitions. [2023-08-27 00:17:40,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 35 transitions, 198 flow [2023-08-27 00:17:40,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 00:17:40,201 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 132 flow [2023-08-27 00:17:40,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-27 00:17:40,202 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-27 00:17:40,202 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 132 flow [2023-08-27 00:17:40,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:40,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 00:17:40,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:40,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1074689428, now seen corresponding path program 2 times [2023-08-27 00:17:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:40,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879232664] [2023-08-27 00:17:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:40,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 00:17:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879232664] [2023-08-27 00:17:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879232664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 00:17:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 00:17:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 00:17:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925117382] [2023-08-27 00:17:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 00:17:40,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 00:17:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 00:17:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 00:17:40,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 174 [2023-08-27 00:17:40,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:40,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 174 [2023-08-27 00:17:40,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:40,417 INFO L124 PetriNetUnfolderBase]: 104/189 cut-off events. [2023-08-27 00:17:40,417 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-27 00:17:40,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 189 events. 104/189 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 582 event pairs, 21 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 225. Up to 123 conditions per place. [2023-08-27 00:17:40,418 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 29 selfloop transitions, 5 changer transitions 5/39 dead transitions. [2023-08-27 00:17:40,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 261 flow [2023-08-27 00:17:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 00:17:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 00:17:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2023-08-27 00:17:40,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46264367816091956 [2023-08-27 00:17:40,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:40,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 322 transitions. [2023-08-27 00:17:40,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,422 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,422 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 132 flow. Second operand 4 states and 322 transitions. [2023-08-27 00:17:40,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 261 flow [2023-08-27 00:17:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 247 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-27 00:17:40,424 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 128 flow [2023-08-27 00:17:40,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-27 00:17:40,424 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-08-27 00:17:40,424 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 128 flow [2023-08-27 00:17:40,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:40,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:40,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 00:17:40,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:40,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1656209441, now seen corresponding path program 1 times [2023-08-27 00:17:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112723104] [2023-08-27 00:17:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 00:17:40,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:40,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112723104] [2023-08-27 00:17:40,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112723104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 00:17:40,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 00:17:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 00:17:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661908866] [2023-08-27 00:17:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 00:17:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 00:17:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 00:17:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 00:17:40,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-08-27 00:17:40,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-08-27 00:17:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:40,621 INFO L124 PetriNetUnfolderBase]: 132/233 cut-off events. [2023-08-27 00:17:40,622 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-27 00:17:40,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 233 events. 132/233 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 741 event pairs, 41 based on Foata normal form. 1/234 useless extension candidates. Maximal degree in co-relation 650. Up to 87 conditions per place. [2023-08-27 00:17:40,624 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 20 selfloop transitions, 15 changer transitions 9/44 dead transitions. [2023-08-27 00:17:40,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 292 flow [2023-08-27 00:17:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 00:17:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 00:17:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 431 transitions. [2023-08-27 00:17:40,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954022988505747 [2023-08-27 00:17:40,625 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 431 transitions. [2023-08-27 00:17:40,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 431 transitions. [2023-08-27 00:17:40,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:40,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 431 transitions. [2023-08-27 00:17:40,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,628 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 128 flow. Second operand 5 states and 431 transitions. [2023-08-27 00:17:40,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 292 flow [2023-08-27 00:17:40,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 277 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 00:17:40,631 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 221 flow [2023-08-27 00:17:40,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-27 00:17:40,633 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-27 00:17:40,633 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 221 flow [2023-08-27 00:17:40,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:40,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:40,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:40,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 00:17:40,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:40,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -145964797, now seen corresponding path program 2 times [2023-08-27 00:17:40,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:40,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609577345] [2023-08-27 00:17:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609577345] [2023-08-27 00:17:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609577345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 00:17:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426875713] [2023-08-27 00:17:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 00:17:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 00:17:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 00:17:40,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 00:17:40,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 00:17:40,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 00:17:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 00:17:40,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 00:17:40,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 00:17:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:40,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 00:17:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:41,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426875713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 00:17:41,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 00:17:41,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-27 00:17:41,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527218709] [2023-08-27 00:17:41,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 00:17:41,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 00:17:41,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 00:17:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 00:17:41,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-08-27 00:17:41,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:41,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-08-27 00:17:41,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:41,112 INFO L124 PetriNetUnfolderBase]: 166/292 cut-off events. [2023-08-27 00:17:41,112 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-27 00:17:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 292 events. 166/292 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1009 event pairs, 35 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 351. Up to 171 conditions per place. [2023-08-27 00:17:41,113 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-08-27 00:17:41,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 406 flow [2023-08-27 00:17:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 00:17:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 00:17:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2023-08-27 00:17:41,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49195402298850577 [2023-08-27 00:17:41,115 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2023-08-27 00:17:41,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2023-08-27 00:17:41,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:41,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2023-08-27 00:17:41,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,117 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,117 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 221 flow. Second operand 5 states and 428 transitions. [2023-08-27 00:17:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 406 flow [2023-08-27 00:17:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 372 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-27 00:17:41,119 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 307 flow [2023-08-27 00:17:41,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-27 00:17:41,120 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-27 00:17:41,120 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 307 flow [2023-08-27 00:17:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 00:17:41,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 00:17:41,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 00:17:41,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-27 00:17:41,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 00:17:41,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 00:17:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1856578105, now seen corresponding path program 3 times [2023-08-27 00:17:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 00:17:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430137483] [2023-08-27 00:17:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 00:17:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 00:17:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 00:17:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 00:17:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430137483] [2023-08-27 00:17:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430137483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 00:17:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580388122] [2023-08-27 00:17:41,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 00:17:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 00:17:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 00:17:41,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 00:17:41,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 00:17:41,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 00:17:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 00:17:41,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 00:17:41,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 00:17:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:41,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 00:17:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 00:17:41,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580388122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 00:17:41,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 00:17:41,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-27 00:17:41,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153735134] [2023-08-27 00:17:41,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 00:17:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 00:17:41,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 00:17:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 00:17:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-27 00:17:41,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 174 [2023-08-27 00:17:41,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 81.5) internal successors, (489), 6 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 00:17:41,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 174 [2023-08-27 00:17:41,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 00:17:41,670 INFO L124 PetriNetUnfolderBase]: 166/291 cut-off events. [2023-08-27 00:17:41,670 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-08-27 00:17:41,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 291 events. 166/291 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1010 event pairs, 45 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 708. Up to 144 conditions per place. [2023-08-27 00:17:41,671 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-27 00:17:41,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 459 flow [2023-08-27 00:17:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 00:17:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 00:17:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2023-08-27 00:17:41,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48084291187739464 [2023-08-27 00:17:41,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2023-08-27 00:17:41,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2023-08-27 00:17:41,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 00:17:41,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2023-08-27 00:17:41,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,675 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 307 flow. Second operand 6 states and 502 transitions. [2023-08-27 00:17:41,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 459 flow [2023-08-27 00:17:41,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 435 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 00:17:41,677 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-27 00:17:41,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-27 00:17:41,678 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-27 00:17:41,678 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-27 00:17:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.5) internal successors, (489), 6 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 00:17:41,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2023-08-27 00:17:41,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-27 00:17:41,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-27 00:17:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 00:17:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-27 00:17:41,885 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2023-08-27 00:17:41,887 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 00:17:41,887 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 00:17:41,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 12:17:41 BasicIcfg [2023-08-27 00:17:41,889 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 00:17:41,889 INFO L158 Benchmark]: Toolchain (without parser) took 5276.03ms. Allocated memory was 331.4MB in the beginning and 413.1MB in the end (delta: 81.8MB). Free memory was 307.3MB in the beginning and 299.1MB in the end (delta: 8.2MB). Peak memory consumption was 92.4MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,890 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 307.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 00:17:41,890 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.90ms. Allocated memory is still 331.4MB. Free memory was 306.8MB in the beginning and 296.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,890 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.10ms. Allocated memory is still 331.4MB. Free memory was 296.1MB in the beginning and 294.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,890 INFO L158 Benchmark]: Boogie Preprocessor took 28.07ms. Allocated memory is still 331.4MB. Free memory was 294.5MB in the beginning and 293.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,891 INFO L158 Benchmark]: RCFGBuilder took 421.83ms. Allocated memory is still 331.4MB. Free memory was 293.0MB in the beginning and 278.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,891 INFO L158 Benchmark]: TraceAbstraction took 4569.12ms. Allocated memory was 331.4MB in the beginning and 413.1MB in the end (delta: 81.8MB). Free memory was 278.3MB in the beginning and 299.1MB in the end (delta: -20.8MB). Peak memory consumption was 63.1MB. Max. memory is 16.0GB. [2023-08-27 00:17:41,892 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 307.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 211.90ms. Allocated memory is still 331.4MB. Free memory was 306.8MB in the beginning and 296.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.10ms. Allocated memory is still 331.4MB. Free memory was 296.1MB in the beginning and 294.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.07ms. Allocated memory is still 331.4MB. Free memory was 294.5MB in the beginning and 293.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 421.83ms. Allocated memory is still 331.4MB. Free memory was 293.0MB in the beginning and 278.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4569.12ms. Allocated memory was 331.4MB in the beginning and 413.1MB in the end (delta: 81.8MB). Free memory was 278.3MB in the beginning and 299.1MB in the end (delta: -20.8MB). Peak memory consumption was 63.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 86 PlacesBefore, 20 PlacesAfterwards, 85 TransitionsBefore, 15 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 78 TotalNumberOfCompositions, 899 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 743, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 400, independent: 393, independent conditional: 0, independent unconditional: 393, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 743, independent: 322, independent conditional: 0, independent unconditional: 322, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 400, unknown conditional: 0, unknown unconditional: 400] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 117 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: 4.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 443 IncrementalHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 443 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307occurred in iteration=6, InterpolantAutomatonStates: 31, 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, 1.1s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 1056 SizeOfPredicates, 8 NumberOfNonLiveVariables, 242 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 11/17 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! [2023-08-27 00:17:41,910 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...