/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 02:56:26,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 02:56:26,271 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 02:56:26,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 02:56:26,281 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 02:56:26,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 02:56:26,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 02:56:26,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 02:56:26,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 02:56:26,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 02:56:26,321 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 02:56:26,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 02:56:26,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 02:56:26,322 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 02:56:26,323 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 02:56:26,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 02:56:26,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 02:56:26,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 02:56:26,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 02:56:26,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 02:56:26,324 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 02:56:26,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 02:56:26,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 02:56:26,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 02:56:26,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 02:56:26,325 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 02:56:26,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 02:56:26,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:56:26,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 02:56:26,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 02:56:26,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 02:56:26,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 02:56:26,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 02:56:26,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 02:56:26,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 02:56:26,328 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 02:56:26,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 02:56:26,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 02:56:26,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 02:56:26,610 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 02:56:26,611 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 02:56:26,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2023-08-27 02:56:27,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 02:56:28,019 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 02:56:28,019 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2023-08-27 02:56:28,042 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e2b913c/f9fe9837b7e4433ab60497e5e78485d3/FLAGf5b73993c [2023-08-27 02:56:28,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e2b913c/f9fe9837b7e4433ab60497e5e78485d3 [2023-08-27 02:56:28,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 02:56:28,056 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 02:56:28,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 02:56:28,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 02:56:28,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 02:56:28,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cdaa1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28, skipping insertion in model container [2023-08-27 02:56:28,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,097 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 02:56:28,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:56:28,443 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 02:56:28,470 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 02:56:28,471 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 02:56:28,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:56:28,524 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:56:28,525 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:56:28,531 INFO L206 MainTranslator]: Completed translation [2023-08-27 02:56:28,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28 WrapperNode [2023-08-27 02:56:28,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 02:56:28,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 02:56:28,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 02:56:28,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 02:56:28,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,588 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-27 02:56:28,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 02:56:28,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 02:56:28,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 02:56:28,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 02:56:28,597 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 02:56:28,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 02:56:28,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 02:56:28,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 02:56:28,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (1/1) ... [2023-08-27 02:56:28,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:56:28,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:28,662 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 02:56:28,671 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 02:56:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-27 02:56:28,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-27 02:56:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-27 02:56:28,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-27 02:56:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 02:56:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 02:56:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 02:56:28,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 02:56:28,701 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 02:56:28,814 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 02:56:28,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 02:56:29,027 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 02:56:29,044 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 02:56:29,044 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 02:56:29,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:56:29 BoogieIcfgContainer [2023-08-27 02:56:29,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 02:56:29,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 02:56:29,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 02:56:29,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 02:56:29,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:56:28" (1/3) ... [2023-08-27 02:56:29,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633bd625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:56:29, skipping insertion in model container [2023-08-27 02:56:29,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:56:28" (2/3) ... [2023-08-27 02:56:29,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633bd625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:56:29, skipping insertion in model container [2023-08-27 02:56:29,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:56:29" (3/3) ... [2023-08-27 02:56:29,053 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2023-08-27 02:56:29,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 02:56:29,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 02:56:29,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 02:56:29,142 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 02:56:29,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 178 flow [2023-08-27 02:56:29,210 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-27 02:56:29,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 02:56:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 82 events. 6/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 157 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-27 02:56:29,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 178 flow [2023-08-27 02:56:29,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 82 transitions, 170 flow [2023-08-27 02:56:29,226 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 02:56:29,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 82 transitions, 170 flow [2023-08-27 02:56:29,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 82 transitions, 170 flow [2023-08-27 02:56:29,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 170 flow [2023-08-27 02:56:29,287 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-27 02:56:29,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 02:56:29,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 82 events. 6/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-27 02:56:29,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 2304 [2023-08-27 02:56:31,685 INFO L134 LiptonReduction]: Checked pairs total: 2595 [2023-08-27 02:56:31,686 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-27 02:56:31,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 02:56:31,702 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;@51850cfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 02:56:31,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-27 02:56:31,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 02:56:31,704 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-08-27 02:56:31,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 02:56:31,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:31,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 02:56:31,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:31,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash 10934624, now seen corresponding path program 1 times [2023-08-27 02:56:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:31,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587052031] [2023-08-27 02:56:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:31,937 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 02:56:31,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587052031] [2023-08-27 02:56:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587052031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:56:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913795935] [2023-08-27 02:56:31,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:31,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:31,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:31,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 02:56:31,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 02:56:31,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:31,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 02:56:31,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:32,138 INFO L124 PetriNetUnfolderBase]: 415/650 cut-off events. [2023-08-27 02:56:32,138 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 02:56:32,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 650 events. 415/650 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2587 event pairs, 159 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 1306. Up to 351 conditions per place. [2023-08-27 02:56:32,149 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 28 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-27 02:56:32,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 134 flow [2023-08-27 02:56:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-27 02:56:32,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2023-08-27 02:56:32,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-27 02:56:32,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-27 02:56:32,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:32,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-27 02:56:32,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 02:56:32,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,181 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 3 states and 249 transitions. [2023-08-27 02:56:32,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 134 flow [2023-08-27 02:56:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:32,185 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 72 flow [2023-08-27 02:56:32,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-27 02:56:32,191 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-08-27 02:56:32,191 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 72 flow [2023-08-27 02:56:32,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 02:56:32,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:32,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 02:56:32,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 02:56:32,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:32,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 10934666, now seen corresponding path program 1 times [2023-08-27 02:56:32,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:32,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44274431] [2023-08-27 02:56:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:32,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:32,307 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 02:56:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44274431] [2023-08-27 02:56:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44274431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919186052] [2023-08-27 02:56:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:32,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:32,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:32,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:32,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:32,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:32,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:32,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:32,414 INFO L124 PetriNetUnfolderBase]: 601/944 cut-off events. [2023-08-27 02:56:32,415 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-27 02:56:32,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 944 events. 601/944 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4286 event pairs, 309 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 2246. Up to 651 conditions per place. [2023-08-27 02:56:32,420 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-27 02:56:32,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 206 flow [2023-08-27 02:56:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-27 02:56:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600389863547758 [2023-08-27 02:56:32,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-27 02:56:32,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-27 02:56:32,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:32,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-27 02:56:32,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 02:56:32,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,440 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 72 flow. Second operand 3 states and 236 transitions. [2023-08-27 02:56:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 206 flow [2023-08-27 02:56:32,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:32,444 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 78 flow [2023-08-27 02:56:32,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-27 02:56:32,445 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-27 02:56:32,445 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 78 flow [2023-08-27 02:56:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:32,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:32,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 02:56:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 02:56:32,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:32,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 10934625, now seen corresponding path program 1 times [2023-08-27 02:56:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:32,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459292966] [2023-08-27 02:56:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:32,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:32,472 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 02:56:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459292966] [2023-08-27 02:56:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459292966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:32,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:32,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:56:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702988141] [2023-08-27 02:56:32,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:32,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 02:56:32,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 02:56:32,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:32,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 02:56:32,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:32,557 INFO L124 PetriNetUnfolderBase]: 581/952 cut-off events. [2023-08-27 02:56:32,558 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-27 02:56:32,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 952 events. 581/952 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4441 event pairs, 198 based on Foata normal form. 44/566 useless extension candidates. Maximal degree in co-relation 2386. Up to 582 conditions per place. [2023-08-27 02:56:32,563 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 31 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-27 02:56:32,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 198 flow [2023-08-27 02:56:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-27 02:56:32,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-27 02:56:32,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-27 02:56:32,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-27 02:56:32,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:32,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-27 02:56:32,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:32,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:32,568 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 78 flow. Second operand 3 states and 242 transitions. [2023-08-27 02:56:32,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 198 flow [2023-08-27 02:56:32,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:32,569 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 114 flow [2023-08-27 02:56:32,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-27 02:56:32,570 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-27 02:56:32,570 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 114 flow [2023-08-27 02:56:32,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 02:56:32,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:32,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 02:56:32,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 02:56:32,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:32,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 338975209, now seen corresponding path program 1 times [2023-08-27 02:56:32,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:32,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346583177] [2023-08-27 02:56:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:32,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346583177] [2023-08-27 02:56:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346583177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598666002] [2023-08-27 02:56:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:32,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:32,621 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 02:56:32,641 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 02:56:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:32,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:56:32,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:32,753 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 02:56:32,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:56:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598666002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:32,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:56:32,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 02:56:32,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032306376] [2023-08-27 02:56:32,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:32,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:32,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 02:56:32,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:32,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:32,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:32,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:32,868 INFO L124 PetriNetUnfolderBase]: 505/834 cut-off events. [2023-08-27 02:56:32,868 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2023-08-27 02:56:32,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 834 events. 505/834 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3981 event pairs, 95 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 2264. Up to 340 conditions per place. [2023-08-27 02:56:32,873 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 54 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-27 02:56:32,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 57 transitions, 353 flow [2023-08-27 02:56:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 02:56:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 02:56:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-27 02:56:32,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-27 02:56:32,875 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-27 02:56:32,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-27 02:56:32,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:32,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-27 02:56:32,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 02:56:32,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:32,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:32,878 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 114 flow. Second operand 4 states and 312 transitions. [2023-08-27 02:56:32,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 57 transitions, 353 flow [2023-08-27 02:56:32,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 57 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:32,880 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 110 flow [2023-08-27 02:56:32,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-27 02:56:32,881 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2023-08-27 02:56:32,881 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 110 flow [2023-08-27 02:56:32,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:32,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:32,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 02:56:32,890 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 02:56:33,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:33,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:33,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1919052570, now seen corresponding path program 1 times [2023-08-27 02:56:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:33,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142188017] [2023-08-27 02:56:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:33,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:33,206 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 02:56:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142188017] [2023-08-27 02:56:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142188017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109738812] [2023-08-27 02:56:33,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:56:33,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:33,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 02:56:33,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:33,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:33,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:33,313 INFO L124 PetriNetUnfolderBase]: 441/738 cut-off events. [2023-08-27 02:56:33,313 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-08-27 02:56:33,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2092 conditions, 738 events. 441/738 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3325 event pairs, 115 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 2078. Up to 605 conditions per place. [2023-08-27 02:56:33,318 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 34 selfloop transitions, 6 changer transitions 2/42 dead transitions. [2023-08-27 02:56:33,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 264 flow [2023-08-27 02:56:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 02:56:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 02:56:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2023-08-27 02:56:33,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-27 02:56:33,319 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2023-08-27 02:56:33,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2023-08-27 02:56:33,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:33,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2023-08-27 02:56:33,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 02:56:33,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:33,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:33,322 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 110 flow. Second operand 4 states and 294 transitions. [2023-08-27 02:56:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 264 flow [2023-08-27 02:56:33,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:33,324 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 147 flow [2023-08-27 02:56:33,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-27 02:56:33,326 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-27 02:56:33,326 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 147 flow [2023-08-27 02:56:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 02:56:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 02:56:33,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 02:56:33,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:33,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1919051912, now seen corresponding path program 1 times [2023-08-27 02:56:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084172170] [2023-08-27 02:56:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:33,372 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 02:56:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084172170] [2023-08-27 02:56:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084172170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:33,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:56:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079389765] [2023-08-27 02:56:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:33,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 02:56:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 02:56:33,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 02:56:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:33,460 INFO L124 PetriNetUnfolderBase]: 409/692 cut-off events. [2023-08-27 02:56:33,461 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-27 02:56:33,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 692 events. 409/692 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3253 event pairs, 121 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 2193. Up to 370 conditions per place. [2023-08-27 02:56:33,465 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-27 02:56:33,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 372 flow [2023-08-27 02:56:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-27 02:56:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-08-27 02:56:33,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-27 02:56:33,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-27 02:56:33,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:33,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-27 02:56:33,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 02:56:33,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:33,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:33,470 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 147 flow. Second operand 3 states and 243 transitions. [2023-08-27 02:56:33,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 372 flow [2023-08-27 02:56:33,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:33,474 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 174 flow [2023-08-27 02:56:33,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-27 02:56:33,476 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-08-27 02:56:33,476 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 174 flow [2023-08-27 02:56:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 02:56:33,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:33,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 02:56:33,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:33,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash -638931166, now seen corresponding path program 1 times [2023-08-27 02:56:33,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:33,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834533488] [2023-08-27 02:56:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834533488] [2023-08-27 02:56:33,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834533488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048952236] [2023-08-27 02:56:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:33,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:33,534 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 02:56:33,535 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 02:56:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:33,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:56:33,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:33,637 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 02:56:33,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:56:33,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048952236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:33,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:56:33,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 02:56:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597232779] [2023-08-27 02:56:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 02:56:33,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:33,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 02:56:33,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:33,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:33,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:33,729 INFO L124 PetriNetUnfolderBase]: 329/564 cut-off events. [2023-08-27 02:56:33,729 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2023-08-27 02:56:33,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 564 events. 329/564 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2497 event pairs, 107 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 1899. Up to 330 conditions per place. [2023-08-27 02:56:33,732 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-08-27 02:56:33,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 306 flow [2023-08-27 02:56:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 02:56:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 02:56:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-27 02:56:33,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2023-08-27 02:56:33,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-27 02:56:33,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-27 02:56:33,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:33,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-27 02:56:33,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 02:56:33,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:33,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:56:33,737 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 174 flow. Second operand 4 states and 303 transitions. [2023-08-27 02:56:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 306 flow [2023-08-27 02:56:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:33,739 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 140 flow [2023-08-27 02:56:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-27 02:56:33,740 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-08-27 02:56:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 140 flow [2023-08-27 02:56:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 02:56:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:33,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:33,748 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 02:56:33,946 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 02:56:33,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:33,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash -638931208, now seen corresponding path program 1 times [2023-08-27 02:56:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:33,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149071890] [2023-08-27 02:56:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:33,971 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 02:56:33,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149071890] [2023-08-27 02:56:33,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149071890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:33,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:33,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:56:33,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276713663] [2023-08-27 02:56:33,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:33,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:33,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:33,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 02:56:33,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 02:56:33,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:33,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 02:56:33,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,041 INFO L124 PetriNetUnfolderBase]: 291/512 cut-off events. [2023-08-27 02:56:34,041 INFO L125 PetriNetUnfolderBase]: For 664/664 co-relation queries the response was YES. [2023-08-27 02:56:34,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 512 events. 291/512 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2308 event pairs, 77 based on Foata normal form. 24/536 useless extension candidates. Maximal degree in co-relation 1720. Up to 304 conditions per place. [2023-08-27 02:56:34,045 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-08-27 02:56:34,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 303 flow [2023-08-27 02:56:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-27 02:56:34,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-08-27 02:56:34,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-27 02:56:34,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-27 02:56:34,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-27 02:56:34,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 02:56:34,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,050 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 140 flow. Second operand 3 states and 240 transitions. [2023-08-27 02:56:34,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 303 flow [2023-08-27 02:56:34,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:34,052 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 150 flow [2023-08-27 02:56:34,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-27 02:56:34,054 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-27 02:56:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 150 flow [2023-08-27 02:56:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 02:56:34,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 02:56:34,055 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 928422853, now seen corresponding path program 1 times [2023-08-27 02:56:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648843919] [2023-08-27 02:56:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,102 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 02:56:34,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648843919] [2023-08-27 02:56:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648843919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793332779] [2023-08-27 02:56:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:56:34,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:34,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:34,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,203 INFO L124 PetriNetUnfolderBase]: 359/624 cut-off events. [2023-08-27 02:56:34,203 INFO L125 PetriNetUnfolderBase]: For 999/999 co-relation queries the response was YES. [2023-08-27 02:56:34,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 624 events. 359/624 cut-off events. For 999/999 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2844 event pairs, 104 based on Foata normal form. 38/662 useless extension candidates. Maximal degree in co-relation 2136. Up to 296 conditions per place. [2023-08-27 02:56:34,207 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-08-27 02:56:34,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 420 flow [2023-08-27 02:56:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:56:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:56:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-08-27 02:56:34,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-08-27 02:56:34,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-08-27 02:56:34,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-08-27 02:56:34,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-08-27 02:56:34,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 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 02:56:34,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,212 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,212 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 150 flow. Second operand 5 states and 382 transitions. [2023-08-27 02:56:34,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 420 flow [2023-08-27 02:56:34,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 406 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:34,215 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 254 flow [2023-08-27 02:56:34,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-27 02:56:34,215 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-08-27 02:56:34,216 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 254 flow [2023-08-27 02:56:34,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 02:56:34,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash 928422549, now seen corresponding path program 1 times [2023-08-27 02:56:34,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076795501] [2023-08-27 02:56:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,245 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 02:56:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076795501] [2023-08-27 02:56:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076795501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133267458] [2023-08-27 02:56:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:34,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:56:34,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:34,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,354 INFO L124 PetriNetUnfolderBase]: 431/728 cut-off events. [2023-08-27 02:56:34,354 INFO L125 PetriNetUnfolderBase]: For 1752/1752 co-relation queries the response was YES. [2023-08-27 02:56:34,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 728 events. 431/728 cut-off events. For 1752/1752 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3262 event pairs, 82 based on Foata normal form. 32/760 useless extension candidates. Maximal degree in co-relation 2758. Up to 386 conditions per place. [2023-08-27 02:56:34,360 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 52 selfloop transitions, 13 changer transitions 0/65 dead transitions. [2023-08-27 02:56:34,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 547 flow [2023-08-27 02:56:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:56:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:56:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 384 transitions. [2023-08-27 02:56:34,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2023-08-27 02:56:34,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 384 transitions. [2023-08-27 02:56:34,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 384 transitions. [2023-08-27 02:56:34,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 384 transitions. [2023-08-27 02:56:34,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 02:56:34,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,365 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,365 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 254 flow. Second operand 5 states and 384 transitions. [2023-08-27 02:56:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 547 flow [2023-08-27 02:56:34,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 547 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 02:56:34,370 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 364 flow [2023-08-27 02:56:34,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-27 02:56:34,371 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2023-08-27 02:56:34,371 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 364 flow [2023-08-27 02:56:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 02:56:34,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 928422548, now seen corresponding path program 1 times [2023-08-27 02:56:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348948031] [2023-08-27 02:56:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,402 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 02:56:34,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348948031] [2023-08-27 02:56:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348948031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234236905] [2023-08-27 02:56:34,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:56:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:56:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:56:34,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:34,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:34,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,471 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2023-08-27 02:56:34,471 INFO L125 PetriNetUnfolderBase]: For 2152/2152 co-relation queries the response was YES. [2023-08-27 02:56:34,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 485 events. 288/485 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1858 event pairs, 163 based on Foata normal form. 64/549 useless extension candidates. Maximal degree in co-relation 1934. Up to 485 conditions per place. [2023-08-27 02:56:34,475 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 02:56:34,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 31 transitions, 324 flow [2023-08-27 02:56:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-08-27 02:56:34,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249512670565302 [2023-08-27 02:56:34,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-08-27 02:56:34,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-08-27 02:56:34,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-08-27 02:56:34,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 02:56:34,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,479 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 364 flow. Second operand 3 states and 218 transitions. [2023-08-27 02:56:34,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 31 transitions, 324 flow [2023-08-27 02:56:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 31 transitions, 286 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-27 02:56:34,483 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 226 flow [2023-08-27 02:56:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-27 02:56:34,484 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-08-27 02:56:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 226 flow [2023-08-27 02:56:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 02:56:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 02:56:34,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1668520394, now seen corresponding path program 1 times [2023-08-27 02:56:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638632478] [2023-08-27 02:56:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,567 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 02:56:34,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638632478] [2023-08-27 02:56:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638632478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 02:56:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602356941] [2023-08-27 02:56:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 02:56:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 02:56:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 02:56:34,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:34,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:56:34,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:34,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,666 INFO L124 PetriNetUnfolderBase]: 331/581 cut-off events. [2023-08-27 02:56:34,666 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2023-08-27 02:56:34,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 581 events. 331/581 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2575 event pairs, 71 based on Foata normal form. 20/601 useless extension candidates. Maximal degree in co-relation 2123. Up to 365 conditions per place. [2023-08-27 02:56:34,669 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 51 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2023-08-27 02:56:34,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 585 flow [2023-08-27 02:56:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 02:56:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 02:56:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2023-08-27 02:56:34,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-08-27 02:56:34,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2023-08-27 02:56:34,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2023-08-27 02:56:34,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2023-08-27 02:56:34,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 02:56:34,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 02:56:34,674 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 02:56:34,674 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 226 flow. Second operand 6 states and 429 transitions. [2023-08-27 02:56:34,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 585 flow [2023-08-27 02:56:34,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:34,678 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 434 flow [2023-08-27 02:56:34,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-27 02:56:34,679 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-27 02:56:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 434 flow [2023-08-27 02:56:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:56:34,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 02:56:34,680 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1667969834, now seen corresponding path program 2 times [2023-08-27 02:56:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392635063] [2023-08-27 02:56:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,741 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 02:56:34,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392635063] [2023-08-27 02:56:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392635063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 02:56:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113457262] [2023-08-27 02:56:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 02:56:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 02:56:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 02:56:34,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:34,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:56:34,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:34,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,853 INFO L124 PetriNetUnfolderBase]: 335/581 cut-off events. [2023-08-27 02:56:34,854 INFO L125 PetriNetUnfolderBase]: For 2037/2037 co-relation queries the response was YES. [2023-08-27 02:56:34,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2594 conditions, 581 events. 335/581 cut-off events. For 2037/2037 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2518 event pairs, 84 based on Foata normal form. 12/593 useless extension candidates. Maximal degree in co-relation 2566. Up to 361 conditions per place. [2023-08-27 02:56:34,857 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 50 selfloop transitions, 17 changer transitions 1/68 dead transitions. [2023-08-27 02:56:34,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 707 flow [2023-08-27 02:56:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:56:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:56:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-08-27 02:56:34,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41754385964912283 [2023-08-27 02:56:34,859 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-08-27 02:56:34,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-08-27 02:56:34,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-08-27 02:56:34,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 02:56:34,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:56:34,862 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 434 flow. Second operand 5 states and 357 transitions. [2023-08-27 02:56:34,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 707 flow [2023-08-27 02:56:34,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 705 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-27 02:56:34,868 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 528 flow [2023-08-27 02:56:34,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-27 02:56:34,868 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-27 02:56:34,868 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 528 flow [2023-08-27 02:56:34,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 02:56:34,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 02:56:34,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1283660965, now seen corresponding path program 1 times [2023-08-27 02:56:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925844545] [2023-08-27 02:56:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:34,887 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 02:56:34,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925844545] [2023-08-27 02:56:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925844545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:34,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:34,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:56:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041116309] [2023-08-27 02:56:34,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:34,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:56:34,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:34,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:56:34,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:56:34,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 02:56:34,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 02:56:34,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:34,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 02:56:34,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:34,975 INFO L124 PetriNetUnfolderBase]: 421/717 cut-off events. [2023-08-27 02:56:34,975 INFO L125 PetriNetUnfolderBase]: For 3734/3734 co-relation queries the response was YES. [2023-08-27 02:56:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 717 events. 421/717 cut-off events. For 3734/3734 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3172 event pairs, 98 based on Foata normal form. 40/757 useless extension candidates. Maximal degree in co-relation 3415. Up to 434 conditions per place. [2023-08-27 02:56:34,980 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 46 selfloop transitions, 21 changer transitions 0/67 dead transitions. [2023-08-27 02:56:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 818 flow [2023-08-27 02:56:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:56:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:56:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-27 02:56:34,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2023-08-27 02:56:34,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-27 02:56:34,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-27 02:56:34,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:34,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-27 02:56:34,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 02:56:34,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:56:34,984 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 528 flow. Second operand 3 states and 237 transitions. [2023-08-27 02:56:34,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 818 flow [2023-08-27 02:56:34,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 798 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 02:56:34,994 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 698 flow [2023-08-27 02:56:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=698, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-27 02:56:34,994 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2023-08-27 02:56:34,994 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 698 flow [2023-08-27 02:56:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 02:56:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:34,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 02:56:34,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:34,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1283660960, now seen corresponding path program 1 times [2023-08-27 02:56:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850580200] [2023-08-27 02:56:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:35,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850580200] [2023-08-27 02:56:35,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850580200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557456437] [2023-08-27 02:56:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:35,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:35,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:35,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:35,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 02:56:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:35,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:56:35,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:35,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557456437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:35,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:35,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 02:56:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401773109] [2023-08-27 02:56:35,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 02:56:35,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 02:56:35,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-27 02:56:35,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:35,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 02:56:35,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:35,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:35,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:35,308 INFO L124 PetriNetUnfolderBase]: 477/806 cut-off events. [2023-08-27 02:56:35,308 INFO L125 PetriNetUnfolderBase]: For 4849/4849 co-relation queries the response was YES. [2023-08-27 02:56:35,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 806 events. 477/806 cut-off events. For 4849/4849 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3417 event pairs, 55 based on Foata normal form. 90/896 useless extension candidates. Maximal degree in co-relation 3984. Up to 273 conditions per place. [2023-08-27 02:56:35,314 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 65 selfloop transitions, 33 changer transitions 1/99 dead transitions. [2023-08-27 02:56:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 1212 flow [2023-08-27 02:56:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 02:56:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 02:56:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 667 transitions. [2023-08-27 02:56:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433398310591293 [2023-08-27 02:56:35,316 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 667 transitions. [2023-08-27 02:56:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 667 transitions. [2023-08-27 02:56:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:35,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 667 transitions. [2023-08-27 02:56:35,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 74.11111111111111) internal successors, (667), 9 states have internal predecessors, (667), 0 states have call successors, (0), 0 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 02:56:35,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 02:56:35,321 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 02:56:35,321 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 698 flow. Second operand 9 states and 667 transitions. [2023-08-27 02:56:35,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 1212 flow [2023-08-27 02:56:35,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 1152 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:35,332 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 881 flow [2023-08-27 02:56:35,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-27 02:56:35,333 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2023-08-27 02:56:35,333 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 881 flow [2023-08-27 02:56:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 02:56:35,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:35,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:35,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:35,539 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:35,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1157182881, now seen corresponding path program 1 times [2023-08-27 02:56:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192204109] [2023-08-27 02:56:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:35,703 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 02:56:35,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:35,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192204109] [2023-08-27 02:56:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192204109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:35,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:56:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281286212] [2023-08-27 02:56:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:35,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 02:56:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 02:56:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:56:35,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:35,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:35,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:35,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:35,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:35,864 INFO L124 PetriNetUnfolderBase]: 501/846 cut-off events. [2023-08-27 02:56:35,864 INFO L125 PetriNetUnfolderBase]: For 6284/6284 co-relation queries the response was YES. [2023-08-27 02:56:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 846 events. 501/846 cut-off events. For 6284/6284 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3654 event pairs, 111 based on Foata normal form. 8/854 useless extension candidates. Maximal degree in co-relation 4625. Up to 483 conditions per place. [2023-08-27 02:56:35,871 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 63 selfloop transitions, 36 changer transitions 1/100 dead transitions. [2023-08-27 02:56:35,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 1380 flow [2023-08-27 02:56:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 02:56:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 02:56:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 564 transitions. [2023-08-27 02:56:35,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2023-08-27 02:56:35,873 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 564 transitions. [2023-08-27 02:56:35,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 564 transitions. [2023-08-27 02:56:35,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:35,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 564 transitions. [2023-08-27 02:56:35,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.5) internal successors, (564), 8 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 02:56:35,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:35,877 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:35,877 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 881 flow. Second operand 8 states and 564 transitions. [2023-08-27 02:56:35,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 1380 flow [2023-08-27 02:56:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 1340 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-27 02:56:35,894 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 1094 flow [2023-08-27 02:56:35,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1094, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-27 02:56:35,894 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2023-08-27 02:56:35,894 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 1094 flow [2023-08-27 02:56:35,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:35,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:35,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:35,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 02:56:35,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:35,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1157208921, now seen corresponding path program 2 times [2023-08-27 02:56:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480707247] [2023-08-27 02:56:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:35,970 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 02:56:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480707247] [2023-08-27 02:56:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480707247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:35,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:56:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780771248] [2023-08-27 02:56:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:35,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 02:56:35,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:35,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 02:56:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:56:35,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 1094 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:36,154 INFO L124 PetriNetUnfolderBase]: 493/830 cut-off events. [2023-08-27 02:56:36,154 INFO L125 PetriNetUnfolderBase]: For 8266/8266 co-relation queries the response was YES. [2023-08-27 02:56:36,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 830 events. 493/830 cut-off events. For 8266/8266 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3547 event pairs, 115 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 4945. Up to 471 conditions per place. [2023-08-27 02:56:36,166 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 60 selfloop transitions, 33 changer transitions 5/98 dead transitions. [2023-08-27 02:56:36,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 98 transitions, 1512 flow [2023-08-27 02:56:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:56:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:56:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2023-08-27 02:56:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118629908103592 [2023-08-27 02:56:36,168 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:36,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 02:56:36,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:56:36,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:56:36,172 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 1094 flow. Second operand 7 states and 493 transitions. [2023-08-27 02:56:36,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 98 transitions, 1512 flow [2023-08-27 02:56:36,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 1480 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-27 02:56:36,199 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 1220 flow [2023-08-27 02:56:36,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-08-27 02:56:36,199 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-08-27 02:56:36,199 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 1220 flow [2023-08-27 02:56:36,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:36,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:36,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:36,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-27 02:56:36,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:36,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1139071749, now seen corresponding path program 3 times [2023-08-27 02:56:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82456660] [2023-08-27 02:56:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:36,301 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 02:56:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82456660] [2023-08-27 02:56:36,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82456660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:36,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:56:36,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 02:56:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136190833] [2023-08-27 02:56:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 02:56:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 02:56:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:56:36,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:36,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:36,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:36,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:36,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:36,471 INFO L124 PetriNetUnfolderBase]: 509/858 cut-off events. [2023-08-27 02:56:36,472 INFO L125 PetriNetUnfolderBase]: For 10709/10709 co-relation queries the response was YES. [2023-08-27 02:56:36,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5461 conditions, 858 events. 509/858 cut-off events. For 10709/10709 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3730 event pairs, 188 based on Foata normal form. 4/862 useless extension candidates. Maximal degree in co-relation 5409. Up to 699 conditions per place. [2023-08-27 02:56:36,479 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 75 selfloop transitions, 20 changer transitions 4/99 dead transitions. [2023-08-27 02:56:36,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 1624 flow [2023-08-27 02:56:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:56:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:56:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2023-08-27 02:56:36,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118629908103592 [2023-08-27 02:56:36,481 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:36,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2023-08-27 02:56:36,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 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 02:56:36,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:56:36,484 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:56:36,484 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 1220 flow. Second operand 7 states and 493 transitions. [2023-08-27 02:56:36,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 1624 flow [2023-08-27 02:56:36,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 1570 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-27 02:56:36,510 INFO L231 Difference]: Finished difference. Result has 97 places, 82 transitions, 1323 flow [2023-08-27 02:56:36,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1323, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2023-08-27 02:56:36,511 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2023-08-27 02:56:36,511 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 1323 flow [2023-08-27 02:56:36,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 02:56:36,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:36,511 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 02:56:36,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:36,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -942512378, now seen corresponding path program 4 times [2023-08-27 02:56:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177100577] [2023-08-27 02:56:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177100577] [2023-08-27 02:56:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177100577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772768172] [2023-08-27 02:56:36,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:56:36,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:36,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:36,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 02:56:36,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:56:36,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:36,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 02:56:36,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:36,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772768172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:37,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:37,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 02:56:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593627257] [2023-08-27 02:56:37,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:37,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 02:56:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 02:56:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-27 02:56:37,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:37,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 1323 flow. Second operand has 13 states, 13 states have (on average 65.84615384615384) internal successors, (856), 13 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 02:56:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:37,384 INFO L124 PetriNetUnfolderBase]: 701/1190 cut-off events. [2023-08-27 02:56:37,385 INFO L125 PetriNetUnfolderBase]: For 15470/15470 co-relation queries the response was YES. [2023-08-27 02:56:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7378 conditions, 1190 events. 701/1190 cut-off events. For 15470/15470 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5436 event pairs, 113 based on Foata normal form. 88/1278 useless extension candidates. Maximal degree in co-relation 7323. Up to 429 conditions per place. [2023-08-27 02:56:37,394 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 81 selfloop transitions, 58 changer transitions 20/159 dead transitions. [2023-08-27 02:56:37,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 2439 flow [2023-08-27 02:56:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 02:56:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 02:56:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1052 transitions. [2023-08-27 02:56:37,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101364522417154 [2023-08-27 02:56:37,397 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1052 transitions. [2023-08-27 02:56:37,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1052 transitions. [2023-08-27 02:56:37,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:37,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1052 transitions. [2023-08-27 02:56:37,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:56:37,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 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 02:56:37,403 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 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 02:56:37,403 INFO L175 Difference]: Start difference. First operand has 97 places, 82 transitions, 1323 flow. Second operand 15 states and 1052 transitions. [2023-08-27 02:56:37,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 2439 flow [2023-08-27 02:56:37,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 159 transitions, 2391 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-27 02:56:37,438 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 1909 flow [2023-08-27 02:56:37,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1909, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2023-08-27 02:56:37,439 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 90 predicate places. [2023-08-27 02:56:37,439 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 1909 flow [2023-08-27 02:56:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.84615384615384) internal successors, (856), 13 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 02:56:37,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:37,439 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:37,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:37,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:37,645 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:37,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:37,646 INFO L85 PathProgramCache]: Analyzing trace with hash 476518742, now seen corresponding path program 2 times [2023-08-27 02:56:37,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:37,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598796634] [2023-08-27 02:56:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:37,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:37,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:37,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598796634] [2023-08-27 02:56:37,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598796634] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:37,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554223021] [2023-08-27 02:56:37,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:56:37,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:37,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:37,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 02:56:37,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:56:37,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:37,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 02:56:37,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:37,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554223021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:37,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:37,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 02:56:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174873030] [2023-08-27 02:56:37,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:37,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 02:56:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 02:56:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 02:56:37,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:37,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 1909 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 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 02:56:37,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:37,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:37,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:38,345 INFO L124 PetriNetUnfolderBase]: 1093/1838 cut-off events. [2023-08-27 02:56:38,345 INFO L125 PetriNetUnfolderBase]: For 32117/32117 co-relation queries the response was YES. [2023-08-27 02:56:38,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12647 conditions, 1838 events. 1093/1838 cut-off events. For 32117/32117 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8621 event pairs, 89 based on Foata normal form. 88/1926 useless extension candidates. Maximal degree in co-relation 12583. Up to 685 conditions per place. [2023-08-27 02:56:38,359 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 133 selfloop transitions, 106 changer transitions 8/247 dead transitions. [2023-08-27 02:56:38,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 247 transitions, 4534 flow [2023-08-27 02:56:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 02:56:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 02:56:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1258 transitions. [2023-08-27 02:56:38,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2023-08-27 02:56:38,363 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1258 transitions. [2023-08-27 02:56:38,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1258 transitions. [2023-08-27 02:56:38,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:38,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1258 transitions. [2023-08-27 02:56:38,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 74.0) internal successors, (1258), 17 states have internal predecessors, (1258), 0 states have call successors, (0), 0 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 02:56:38,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:56:38,371 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:56:38,371 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 1909 flow. Second operand 17 states and 1258 transitions. [2023-08-27 02:56:38,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 247 transitions, 4534 flow [2023-08-27 02:56:38,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 247 transitions, 4222 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-08-27 02:56:38,450 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 3282 flow [2023-08-27 02:56:38,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3282, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2023-08-27 02:56:38,451 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2023-08-27 02:56:38,451 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 3282 flow [2023-08-27 02:56:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 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 02:56:38,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:38,451 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:38,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:38,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:38,662 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:38,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1951786727, now seen corresponding path program 5 times [2023-08-27 02:56:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451683580] [2023-08-27 02:56:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:38,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451683580] [2023-08-27 02:56:38,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451683580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488953778] [2023-08-27 02:56:38,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:56:38,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:38,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:38,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 02:56:38,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 02:56:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:38,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 02:56:38,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:38,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488953778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:39,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 02:56:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283068777] [2023-08-27 02:56:39,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 02:56:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 02:56:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-27 02:56:39,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:39,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 3282 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 02:56:39,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:39,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:39,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:39,710 INFO L124 PetriNetUnfolderBase]: 1377/2350 cut-off events. [2023-08-27 02:56:39,711 INFO L125 PetriNetUnfolderBase]: For 42195/42195 co-relation queries the response was YES. [2023-08-27 02:56:39,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16688 conditions, 2350 events. 1377/2350 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12271 event pairs, 331 based on Foata normal form. 36/2386 useless extension candidates. Maximal degree in co-relation 16615. Up to 1313 conditions per place. [2023-08-27 02:56:39,736 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 150 selfloop transitions, 109 changer transitions 24/283 dead transitions. [2023-08-27 02:56:39,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 283 transitions, 5811 flow [2023-08-27 02:56:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 02:56:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 02:56:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1191 transitions. [2023-08-27 02:56:39,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40970072239422084 [2023-08-27 02:56:39,739 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1191 transitions. [2023-08-27 02:56:39,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1191 transitions. [2023-08-27 02:56:39,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:39,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1191 transitions. [2023-08-27 02:56:39,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.05882352941177) internal successors, (1191), 17 states have internal predecessors, (1191), 0 states have call successors, (0), 0 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 02:56:39,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:56:39,745 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:56:39,745 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 3282 flow. Second operand 17 states and 1191 transitions. [2023-08-27 02:56:39,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 283 transitions, 5811 flow [2023-08-27 02:56:39,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 283 transitions, 5711 flow, removed 37 selfloop flow, removed 3 redundant places. [2023-08-27 02:56:39,871 INFO L231 Difference]: Finished difference. Result has 160 places, 223 transitions, 5113 flow [2023-08-27 02:56:39,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5113, PETRI_PLACES=160, PETRI_TRANSITIONS=223} [2023-08-27 02:56:39,872 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-08-27 02:56:39,872 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 223 transitions, 5113 flow [2023-08-27 02:56:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 02:56:39,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:39,872 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:39,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:40,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:40,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1487184967, now seen corresponding path program 6 times [2023-08-27 02:56:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:40,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814464959] [2023-08-27 02:56:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814464959] [2023-08-27 02:56:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814464959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56215737] [2023-08-27 02:56:40,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 02:56:40,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:40,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 02:56:40,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 02:56:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:40,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 02:56:40,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:40,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56215737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:40,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:40,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 02:56:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32527092] [2023-08-27 02:56:40,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 02:56:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 02:56:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-27 02:56:40,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:40,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 223 transitions, 5113 flow. Second operand has 17 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 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 02:56:40,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:40,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:40,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:41,558 INFO L124 PetriNetUnfolderBase]: 1893/3262 cut-off events. [2023-08-27 02:56:41,558 INFO L125 PetriNetUnfolderBase]: For 84792/84792 co-relation queries the response was YES. [2023-08-27 02:56:41,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25487 conditions, 3262 events. 1893/3262 cut-off events. For 84792/84792 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18693 event pairs, 359 based on Foata normal form. 52/3314 useless extension candidates. Maximal degree in co-relation 25401. Up to 1307 conditions per place. [2023-08-27 02:56:41,589 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 189 selfloop transitions, 200 changer transitions 30/419 dead transitions. [2023-08-27 02:56:41,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 419 transitions, 9678 flow [2023-08-27 02:56:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 02:56:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 02:56:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1535 transitions. [2023-08-27 02:56:41,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40802764486975013 [2023-08-27 02:56:41,592 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1535 transitions. [2023-08-27 02:56:41,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1535 transitions. [2023-08-27 02:56:41,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:41,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1535 transitions. [2023-08-27 02:56:41,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.77272727272727) internal successors, (1535), 22 states have internal predecessors, (1535), 0 states have call successors, (0), 0 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 02:56:41,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 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 02:56:41,600 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 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 02:56:41,600 INFO L175 Difference]: Start difference. First operand has 160 places, 223 transitions, 5113 flow. Second operand 22 states and 1535 transitions. [2023-08-27 02:56:41,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 419 transitions, 9678 flow [2023-08-27 02:56:41,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 419 transitions, 9465 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-27 02:56:41,901 INFO L231 Difference]: Finished difference. Result has 190 places, 320 transitions, 8111 flow [2023-08-27 02:56:41,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8111, PETRI_PLACES=190, PETRI_TRANSITIONS=320} [2023-08-27 02:56:41,902 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 164 predicate places. [2023-08-27 02:56:41,902 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 320 transitions, 8111 flow [2023-08-27 02:56:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 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 02:56:41,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:41,902 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:41,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:42,113 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:42,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1887179761, now seen corresponding path program 7 times [2023-08-27 02:56:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987393986] [2023-08-27 02:56:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987393986] [2023-08-27 02:56:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987393986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369472549] [2023-08-27 02:56:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:56:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:42,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:42,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 02:56:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:42,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 02:56:42,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:42,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:56:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369472549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:42,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:42,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 02:56:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425042819] [2023-08-27 02:56:42,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 02:56:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 02:56:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-27 02:56:42,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:42,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 320 transitions, 8111 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 02:56:42,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:42,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:42,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:43,721 INFO L124 PetriNetUnfolderBase]: 2397/4130 cut-off events. [2023-08-27 02:56:43,721 INFO L125 PetriNetUnfolderBase]: For 140230/140230 co-relation queries the response was YES. [2023-08-27 02:56:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34554 conditions, 4130 events. 2397/4130 cut-off events. For 140230/140230 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24780 event pairs, 260 based on Foata normal form. 88/4218 useless extension candidates. Maximal degree in co-relation 34455. Up to 1671 conditions per place. [2023-08-27 02:56:43,750 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 195 selfloop transitions, 290 changer transitions 39/524 dead transitions. [2023-08-27 02:56:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 524 transitions, 12837 flow [2023-08-27 02:56:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 02:56:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 02:56:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1810 transitions. [2023-08-27 02:56:43,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071075123706703 [2023-08-27 02:56:43,754 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1810 transitions. [2023-08-27 02:56:43,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1810 transitions. [2023-08-27 02:56:43,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:43,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1810 transitions. [2023-08-27 02:56:43,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.61538461538461) internal successors, (1810), 26 states have internal predecessors, (1810), 0 states have call successors, (0), 0 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 02:56:43,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 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 02:56:43,765 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 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 02:56:43,765 INFO L175 Difference]: Start difference. First operand has 190 places, 320 transitions, 8111 flow. Second operand 26 states and 1810 transitions. [2023-08-27 02:56:43,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 524 transitions, 12837 flow [2023-08-27 02:56:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 524 transitions, 12678 flow, removed 67 selfloop flow, removed 4 redundant places. [2023-08-27 02:56:44,349 INFO L231 Difference]: Finished difference. Result has 223 places, 410 transitions, 11006 flow [2023-08-27 02:56:44,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11006, PETRI_PLACES=223, PETRI_TRANSITIONS=410} [2023-08-27 02:56:44,350 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2023-08-27 02:56:44,350 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 410 transitions, 11006 flow [2023-08-27 02:56:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 02:56:44,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:44,351 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:44,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 02:56:44,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:44,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 282475038, now seen corresponding path program 2 times [2023-08-27 02:56:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:44,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412144915] [2023-08-27 02:56:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:44,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:44,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412144915] [2023-08-27 02:56:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412144915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717733961] [2023-08-27 02:56:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:56:44,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:44,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:44,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 02:56:44,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:56:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:44,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 02:56:44,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:44,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717733961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:44,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:44,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-27 02:56:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584647643] [2023-08-27 02:56:44,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 02:56:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 02:56:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-08-27 02:56:44,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:44,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 410 transitions, 11006 flow. Second operand has 22 states, 22 states have (on average 68.45454545454545) internal successors, (1506), 22 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:56:44,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:44,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:44,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:46,509 INFO L124 PetriNetUnfolderBase]: 3005/5130 cut-off events. [2023-08-27 02:56:46,510 INFO L125 PetriNetUnfolderBase]: For 199974/199974 co-relation queries the response was YES. [2023-08-27 02:56:46,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46581 conditions, 5130 events. 3005/5130 cut-off events. For 199974/199974 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29615 event pairs, 275 based on Foata normal form. 180/5310 useless extension candidates. Maximal degree in co-relation 46471. Up to 2063 conditions per place. [2023-08-27 02:56:46,546 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 255 selfloop transitions, 355 changer transitions 18/628 dead transitions. [2023-08-27 02:56:46,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 628 transitions, 17021 flow [2023-08-27 02:56:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 02:56:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 02:56:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1994 transitions. [2023-08-27 02:56:46,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43188217457223305 [2023-08-27 02:56:46,550 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1994 transitions. [2023-08-27 02:56:46,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1994 transitions. [2023-08-27 02:56:46,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:46,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1994 transitions. [2023-08-27 02:56:46,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.85185185185185) internal successors, (1994), 27 states have internal predecessors, (1994), 0 states have call successors, (0), 0 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 02:56:46,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 02:56:46,560 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 02:56:46,560 INFO L175 Difference]: Start difference. First operand has 223 places, 410 transitions, 11006 flow. Second operand 27 states and 1994 transitions. [2023-08-27 02:56:46,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 628 transitions, 17021 flow [2023-08-27 02:56:47,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 628 transitions, 16533 flow, removed 152 selfloop flow, removed 15 redundant places. [2023-08-27 02:56:47,182 INFO L231 Difference]: Finished difference. Result has 250 places, 497 transitions, 14230 flow [2023-08-27 02:56:47,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14230, PETRI_PLACES=250, PETRI_TRANSITIONS=497} [2023-08-27 02:56:47,183 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 224 predicate places. [2023-08-27 02:56:47,183 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 497 transitions, 14230 flow [2023-08-27 02:56:47,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.45454545454545) internal successors, (1506), 22 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 02:56:47,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:47,184 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:47,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-27 02:56:47,389 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:47,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash 346013778, now seen corresponding path program 8 times [2023-08-27 02:56:47,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:47,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047702821] [2023-08-27 02:56:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:47,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047702821] [2023-08-27 02:56:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047702821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705199776] [2023-08-27 02:56:47,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:56:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:47,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:47,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 02:56:47,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:56:47,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:47,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 02:56:47,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:47,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:56:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:47,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705199776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:56:47,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:56:47,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-27 02:56:47,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987185302] [2023-08-27 02:56:47,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:56:47,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 02:56:47,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 02:56:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-27 02:56:47,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 02:56:47,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 497 transitions, 14230 flow. Second operand has 24 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 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 02:56:47,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:47,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 02:56:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:49,581 INFO L124 PetriNetUnfolderBase]: 3173/5426 cut-off events. [2023-08-27 02:56:49,582 INFO L125 PetriNetUnfolderBase]: For 206040/206040 co-relation queries the response was YES. [2023-08-27 02:56:49,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50275 conditions, 5426 events. 3173/5426 cut-off events. For 206040/206040 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 31936 event pairs, 468 based on Foata normal form. 20/5446 useless extension candidates. Maximal degree in co-relation 50153. Up to 2191 conditions per place. [2023-08-27 02:56:49,629 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 227 selfloop transitions, 385 changer transitions 33/645 dead transitions. [2023-08-27 02:56:49,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 645 transitions, 17997 flow [2023-08-27 02:56:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 02:56:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 02:56:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1738 transitions. [2023-08-27 02:56:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40654970760233916 [2023-08-27 02:56:49,636 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1738 transitions. [2023-08-27 02:56:49,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1738 transitions. [2023-08-27 02:56:49,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:49,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1738 transitions. [2023-08-27 02:56:49,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 69.52) internal successors, (1738), 25 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 02:56:49,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 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 02:56:49,646 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 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 02:56:49,646 INFO L175 Difference]: Start difference. First operand has 250 places, 497 transitions, 14230 flow. Second operand 25 states and 1738 transitions. [2023-08-27 02:56:49,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 645 transitions, 17997 flow [2023-08-27 02:56:50,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 645 transitions, 17863 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-08-27 02:56:50,504 INFO L231 Difference]: Finished difference. Result has 278 places, 558 transitions, 16771 flow [2023-08-27 02:56:50,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=14100, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=16771, PETRI_PLACES=278, PETRI_TRANSITIONS=558} [2023-08-27 02:56:50,505 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 252 predicate places. [2023-08-27 02:56:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 558 transitions, 16771 flow [2023-08-27 02:56:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 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 02:56:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:50,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:50,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 02:56:50,711 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:50,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2014867924, now seen corresponding path program 9 times [2023-08-27 02:56:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269440557] [2023-08-27 02:56:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:50,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:50,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269440557] [2023-08-27 02:56:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269440557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146727340] [2023-08-27 02:56:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:56:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:50,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:50,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 02:56:50,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 02:56:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:50,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 02:56:50,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:50,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:56:50,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146727340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:50,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:56:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-27 02:56:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848920471] [2023-08-27 02:56:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:50,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 02:56:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 02:56:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-27 02:56:50,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:50,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 558 transitions, 16771 flow. Second operand has 8 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 02:56:50,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:50,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:52,900 INFO L124 PetriNetUnfolderBase]: 4437/7216 cut-off events. [2023-08-27 02:56:52,900 INFO L125 PetriNetUnfolderBase]: For 245033/245033 co-relation queries the response was YES. [2023-08-27 02:56:52,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60266 conditions, 7216 events. 4437/7216 cut-off events. For 245033/245033 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47011 event pairs, 206 based on Foata normal form. 736/7952 useless extension candidates. Maximal degree in co-relation 60156. Up to 3073 conditions per place. [2023-08-27 02:56:52,950 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 39 selfloop transitions, 15 changer transitions 1190/1244 dead transitions. [2023-08-27 02:56:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1244 transitions, 35200 flow [2023-08-27 02:56:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 02:56:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 02:56:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 589 transitions. [2023-08-27 02:56:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-08-27 02:56:52,951 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 589 transitions. [2023-08-27 02:56:52,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 589 transitions. [2023-08-27 02:56:52,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:52,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 589 transitions. [2023-08-27 02:56:52,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.625) internal successors, (589), 8 states have internal predecessors, (589), 0 states have call successors, (0), 0 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 02:56:52,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:52,954 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:52,954 INFO L175 Difference]: Start difference. First operand has 278 places, 558 transitions, 16771 flow. Second operand 8 states and 589 transitions. [2023-08-27 02:56:52,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1244 transitions, 35200 flow [2023-08-27 02:56:54,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1244 transitions, 31554 flow, removed 187 selfloop flow, removed 38 redundant places. [2023-08-27 02:56:54,176 INFO L231 Difference]: Finished difference. Result has 229 places, 39 transitions, 665 flow [2023-08-27 02:56:54,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=10640, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=229, PETRI_TRANSITIONS=39} [2023-08-27 02:56:54,177 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 203 predicate places. [2023-08-27 02:56:54,177 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 39 transitions, 665 flow [2023-08-27 02:56:54,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 02:56:54,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:56:54,177 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:54,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 02:56:54,378 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 02:56:54,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:56:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1807618492, now seen corresponding path program 10 times [2023-08-27 02:56:54,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:56:54,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610649046] [2023-08-27 02:56:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:56:54,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:56:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:56:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:56:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610649046] [2023-08-27 02:56:54,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610649046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:56:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916893135] [2023-08-27 02:56:54,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:56:54,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:56:54,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:56:54,453 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:56:54,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 02:56:54,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:56:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:56:54,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 02:56:54,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:56:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:56:54,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:56:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916893135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:56:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:56:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-27 02:56:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149048081] [2023-08-27 02:56:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:56:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 02:56:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:56:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 02:56:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-27 02:56:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 02:56:54,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 39 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 02:56:54,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:56:54,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 02:56:54,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:56:54,635 INFO L124 PetriNetUnfolderBase]: 102/229 cut-off events. [2023-08-27 02:56:54,635 INFO L125 PetriNetUnfolderBase]: For 1693/1693 co-relation queries the response was YES. [2023-08-27 02:56:54,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 229 events. 102/229 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 816 event pairs, 3 based on Foata normal form. 30/259 useless extension candidates. Maximal degree in co-relation 1447. Up to 148 conditions per place. [2023-08-27 02:56:54,637 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 0 selfloop transitions, 0 changer transitions 108/108 dead transitions. [2023-08-27 02:56:54,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 108 transitions, 1762 flow [2023-08-27 02:56:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 02:56:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 02:56:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 580 transitions. [2023-08-27 02:56:54,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239766081871345 [2023-08-27 02:56:54,642 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 580 transitions. [2023-08-27 02:56:54,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 580 transitions. [2023-08-27 02:56:54,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:56:54,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 580 transitions. [2023-08-27 02:56:54,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.5) internal successors, (580), 8 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 02:56:54,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:54,645 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 02:56:54,645 INFO L175 Difference]: Start difference. First operand has 229 places, 39 transitions, 665 flow. Second operand 8 states and 580 transitions. [2023-08-27 02:56:54,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 108 transitions, 1762 flow [2023-08-27 02:56:54,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 108 transitions, 941 flow, removed 64 selfloop flow, removed 54 redundant places. [2023-08-27 02:56:54,653 INFO L231 Difference]: Finished difference. Result has 115 places, 0 transitions, 0 flow [2023-08-27 02:56:54,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=115, PETRI_TRANSITIONS=0} [2023-08-27 02:56:54,654 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 89 predicate places. [2023-08-27 02:56:54,654 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 0 transitions, 0 flow [2023-08-27 02:56:54,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 02:56:54,656 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (18 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 19 remaining) [2023-08-27 02:56:54,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 19 remaining) [2023-08-27 02:56:54,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 19 remaining) [2023-08-27 02:56:54,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 02:56:54,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 02:56:54,867 INFO L445 BasicCegarLoop]: Path program histogram: [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:56:54,871 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 02:56:54,871 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 02:56:54,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:56:54 BasicIcfg [2023-08-27 02:56:54,873 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 02:56:54,874 INFO L158 Benchmark]: Toolchain (without parser) took 26817.55ms. Allocated memory was 352.3MB in the beginning and 2.9GB in the end (delta: 2.5GB). Free memory was 327.5MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 641.2MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,874 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 352.3MB. Free memory is still 328.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 02:56:54,874 INFO L158 Benchmark]: CACSL2BoogieTranslator took 474.79ms. Allocated memory is still 352.3MB. Free memory was 327.0MB in the beginning and 307.7MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,874 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.22ms. Allocated memory is still 352.3MB. Free memory was 307.7MB in the beginning and 306.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,874 INFO L158 Benchmark]: Boogie Preprocessor took 42.71ms. Allocated memory is still 352.3MB. Free memory was 306.1MB in the beginning and 304.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,874 INFO L158 Benchmark]: RCFGBuilder took 413.17ms. Allocated memory is still 352.3MB. Free memory was 304.5MB in the beginning and 289.6MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,875 INFO L158 Benchmark]: TraceAbstraction took 25824.79ms. Allocated memory was 352.3MB in the beginning and 2.9GB in the end (delta: 2.5GB). Free memory was 289.1MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 603.5MB. Max. memory is 16.0GB. [2023-08-27 02:56:54,876 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 352.3MB. Free memory is still 328.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 474.79ms. Allocated memory is still 352.3MB. Free memory was 327.0MB in the beginning and 307.7MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.22ms. Allocated memory is still 352.3MB. Free memory was 307.7MB in the beginning and 306.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.71ms. Allocated memory is still 352.3MB. Free memory was 306.1MB in the beginning and 304.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 413.17ms. Allocated memory is still 352.3MB. Free memory was 304.5MB in the beginning and 289.6MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 25824.79ms. Allocated memory was 352.3MB in the beginning and 2.9GB in the end (delta: 2.5GB). Free memory was 289.1MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 603.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 83 PlacesBefore, 26 PlacesAfterwards, 82 TransitionsBefore, 22 TransitionsAfterwards, 2304 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 87 TotalNumberOfCompositions, 2595 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2174, independent: 2140, independent conditional: 0, independent unconditional: 2140, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1300, independent: 1287, independent conditional: 0, independent unconditional: 1287, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2174, independent: 853, independent conditional: 0, independent unconditional: 853, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 1300, unknown conditional: 0, unknown unconditional: 1300] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 693]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 698]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 698]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 696]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 696]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 706]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 706]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 704]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 704]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 115 locations, 19 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: 25.7s, OverallIterations: 27, TraceHistogramMax: 6, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 15.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2267 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2267 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 212 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2941 IncrementalHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 212 mSolverCounterUnsat, 0 mSDtfsCounter, 2941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16771occurred in iteration=25, InterpolantAutomatonStates: 250, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 487 ConstructedInterpolants, 0 QuantifiedInterpolants, 1703 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1853 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 47 InterpolantComputations, 19 PerfectInterpolantSequences, 102/310 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-27 02:56:54,889 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...