/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:39:47,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:39:47,237 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 01:39:47,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:39:47,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:39:47,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:39:47,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:39:47,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:39:47,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:39:47,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:39:47,263 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:39:47,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:39:47,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:39:47,264 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:39:47,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:39:47,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:39:47,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:39:47,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:39:47,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:39:47,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:39:47,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:39:47,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:39:47,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:39:47,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:39:47,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:39:47,267 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:39:47,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:39:47,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:39:47,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:39:47,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:39:47,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:39:47,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:39:47,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:39:47,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:39:47,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:39:47,270 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:39:47,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:39:47,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:39:47,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:39:47,565 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:39:47,565 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:39:47,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-27 01:39:48,620 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:39:48,808 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:39:48,809 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-27 01:39:48,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11aeaead8/db6a3be9286649c5b70c9049839299d8/FLAGd2b12d374 [2023-08-27 01:39:48,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11aeaead8/db6a3be9286649c5b70c9049839299d8 [2023-08-27 01:39:48,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:39:48,841 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:39:48,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:39:48,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:39:48,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:39:48,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:39:48" (1/1) ... [2023-08-27 01:39:48,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68219126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:48, skipping insertion in model container [2023-08-27 01:39:48,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:39:48" (1/1) ... [2023-08-27 01:39:48,870 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:39:49,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:39:49,059 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:39:49,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:39:49,099 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:39:49,100 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:39:49,111 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:39:49,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49 WrapperNode [2023-08-27 01:39:49,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:39:49,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:39:49,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:39:49,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:39:49,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,156 INFO L138 Inliner]: procedures = 22, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-27 01:39:49,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:39:49,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:39:49,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:39:49,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:39:49,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:39:49,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:39:49,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:39:49,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:39:49,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (1/1) ... [2023-08-27 01:39:49,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:39:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:39:49,222 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 01:39:49,230 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 01:39:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:39:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:39:49,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:39:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:39:49,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 01:39:49,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:39:49,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:39:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:39:49,254 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 01:39:49,335 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:39:49,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:39:49,585 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:39:49,649 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:39:49,649 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 01:39:49,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:39:49 BoogieIcfgContainer [2023-08-27 01:39:49,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:39:49,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:39:49,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:39:49,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:39:49,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:39:48" (1/3) ... [2023-08-27 01:39:49,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65808251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:39:49, skipping insertion in model container [2023-08-27 01:39:49,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:39:49" (2/3) ... [2023-08-27 01:39:49,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65808251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:39:49, skipping insertion in model container [2023-08-27 01:39:49,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:39:49" (3/3) ... [2023-08-27 01:39:49,658 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-27 01:39:49,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:39:49,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 01:39:49,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:39:49,762 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 01:39:49,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 214 flow [2023-08-27 01:39:49,873 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2023-08-27 01:39:49,873 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:39:49,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-27 01:39:49,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 95 transitions, 214 flow [2023-08-27 01:39:49,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 81 transitions, 180 flow [2023-08-27 01:39:49,885 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:39:49,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-27 01:39:49,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-27 01:39:49,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 81 transitions, 180 flow [2023-08-27 01:39:49,930 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-08-27 01:39:49,930 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:39:49,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 7/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-27 01:39:49,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2023-08-27 01:39:52,366 INFO L134 LiptonReduction]: Checked pairs total: 1272 [2023-08-27 01:39:52,367 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-27 01:39:52,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:39:52,383 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;@8f01b5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:39:52,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-27 01:39:52,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:39:52,389 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-27 01:39:52,390 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:39:52,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:52,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:52,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:52,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash -107022905, now seen corresponding path program 1 times [2023-08-27 01:39:52,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:52,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245644965] [2023-08-27 01:39:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:52,948 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 01:39:52,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:52,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245644965] [2023-08-27 01:39:52,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245644965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:52,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:52,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:39:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669295611] [2023-08-27 01:39:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:52,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:39:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:39:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:39:52,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 159 [2023-08-27 01:39:52,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 01:39:52,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:52,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 159 [2023-08-27 01:39:52,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:53,121 INFO L124 PetriNetUnfolderBase]: 271/426 cut-off events. [2023-08-27 01:39:53,122 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-27 01:39:53,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 426 events. 271/426 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1520 event pairs, 37 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 671. Up to 309 conditions per place. [2023-08-27 01:39:53,130 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-27 01:39:53,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 181 flow [2023-08-27 01:39:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:39:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:39:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-27 01:39:53,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-08-27 01:39:53,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-27 01:39:53,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-27 01:39:53,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:53,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-27 01:39:53,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 01:39:53,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:39:53,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:39:53,162 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 270 transitions. [2023-08-27 01:39:53,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 181 flow [2023-08-27 01:39:53,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 01:39:53,166 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-08-27 01:39:53,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-27 01:39:53,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-27 01:39:53,170 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-08-27 01:39:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 01:39:53,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:53,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:39:53,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:53,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash 924106453, now seen corresponding path program 1 times [2023-08-27 01:39:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:53,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603202840] [2023-08-27 01:39:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:53,439 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 01:39:53,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:53,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603202840] [2023-08-27 01:39:53,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603202840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:53,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:53,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:39:53,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020670149] [2023-08-27 01:39:53,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:53,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:39:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:39:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:39:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:39:53,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 01:39:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:39:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:53,667 INFO L124 PetriNetUnfolderBase]: 459/707 cut-off events. [2023-08-27 01:39:53,667 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-27 01:39:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 707 events. 459/707 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2558 event pairs, 40 based on Foata normal form. 40/747 useless extension candidates. Maximal degree in co-relation 353. Up to 277 conditions per place. [2023-08-27 01:39:53,671 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 72 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2023-08-27 01:39:53,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 84 transitions, 395 flow [2023-08-27 01:39:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 01:39:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 01:39:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 567 transitions. [2023-08-27 01:39:53,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-27 01:39:53,675 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 567 transitions. [2023-08-27 01:39:53,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 567 transitions. [2023-08-27 01:39:53,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:53,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 567 transitions. [2023-08-27 01:39:53,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 01:39:53,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:53,682 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:53,682 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 567 transitions. [2023-08-27 01:39:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 84 transitions, 395 flow [2023-08-27 01:39:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 84 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:39:53,685 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 154 flow [2023-08-27 01:39:53,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-27 01:39:53,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-27 01:39:53,686 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 154 flow [2023-08-27 01:39:53,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 01:39:53,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:53,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 01:39:53,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:53,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1821619291, now seen corresponding path program 2 times [2023-08-27 01:39:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387487040] [2023-08-27 01:39:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:53,924 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 01:39:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387487040] [2023-08-27 01:39:53,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387487040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:53,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:53,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 01:39:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206528087] [2023-08-27 01:39:53,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:39:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:39:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:39:53,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:39:53,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 01:39:53,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:53,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:39:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:54,196 INFO L124 PetriNetUnfolderBase]: 947/1447 cut-off events. [2023-08-27 01:39:54,196 INFO L125 PetriNetUnfolderBase]: For 825/825 co-relation queries the response was YES. [2023-08-27 01:39:54,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 1447 events. 947/1447 cut-off events. For 825/825 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6101 event pairs, 99 based on Foata normal form. 24/1471 useless extension candidates. Maximal degree in co-relation 2968. Up to 478 conditions per place. [2023-08-27 01:39:54,205 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 96 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-08-27 01:39:54,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 115 transitions, 646 flow [2023-08-27 01:39:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 01:39:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 01:39:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 585 transitions. [2023-08-27 01:39:54,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2023-08-27 01:39:54,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 585 transitions. [2023-08-27 01:39:54,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 585 transitions. [2023-08-27 01:39:54,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:54,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 585 transitions. [2023-08-27 01:39:54,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 01:39:54,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:54,212 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:54,212 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 154 flow. Second operand 7 states and 585 transitions. [2023-08-27 01:39:54,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 115 transitions, 646 flow [2023-08-27 01:39:54,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 115 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 01:39:54,219 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 308 flow [2023-08-27 01:39:54,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=308, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-27 01:39:54,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-08-27 01:39:54,220 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 308 flow [2023-08-27 01:39:54,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 01:39:54,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:54,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 01:39:54,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:54,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 550661333, now seen corresponding path program 3 times [2023-08-27 01:39:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759159014] [2023-08-27 01:39:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:54,346 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 01:39:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759159014] [2023-08-27 01:39:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759159014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:54,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28820098] [2023-08-27 01:39:54,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:39:54,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:39:54,353 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 01:39:54,393 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 01:39:54,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:39:54,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:39:54,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:39:54,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:39:54,531 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 01:39:54,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:39:54,624 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 01:39:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28820098] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:54,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:39:54,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-08-27 01:39:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49519141] [2023-08-27 01:39:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:39:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:39:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:39:54,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:39:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 01:39:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:39:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:54,944 INFO L124 PetriNetUnfolderBase]: 1079/1685 cut-off events. [2023-08-27 01:39:54,944 INFO L125 PetriNetUnfolderBase]: For 4245/4245 co-relation queries the response was YES. [2023-08-27 01:39:54,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6157 conditions, 1685 events. 1079/1685 cut-off events. For 4245/4245 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7484 event pairs, 185 based on Foata normal form. 30/1715 useless extension candidates. Maximal degree in co-relation 4517. Up to 695 conditions per place. [2023-08-27 01:39:54,956 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 70 selfloop transitions, 30 changer transitions 0/100 dead transitions. [2023-08-27 01:39:54,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 745 flow [2023-08-27 01:39:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 01:39:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 01:39:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 563 transitions. [2023-08-27 01:39:54,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058400718778078 [2023-08-27 01:39:54,959 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 563 transitions. [2023-08-27 01:39:54,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 563 transitions. [2023-08-27 01:39:54,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:54,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 563 transitions. [2023-08-27 01:39:54,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.42857142857143) internal successors, (563), 7 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 01:39:54,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:54,964 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 01:39:54,964 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 308 flow. Second operand 7 states and 563 transitions. [2023-08-27 01:39:54,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 745 flow [2023-08-27 01:39:54,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 741 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-27 01:39:54,977 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 530 flow [2023-08-27 01:39:54,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-27 01:39:54,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2023-08-27 01:39:54,979 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 530 flow [2023-08-27 01:39:54,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 01:39:54,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:54,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:54,988 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 01:39:55,185 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 01:39:55,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:55,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:55,187 INFO L85 PathProgramCache]: Analyzing trace with hash -934670115, now seen corresponding path program 1 times [2023-08-27 01:39:55,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:55,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035474779] [2023-08-27 01:39:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:55,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:55,437 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 01:39:55,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035474779] [2023-08-27 01:39:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035474779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549135596] [2023-08-27 01:39:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:39:55,440 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 01:39:55,466 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 01:39:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:55,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 01:39:55,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:39:55,737 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 01:39:55,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:39:55,903 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 01:39:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549135596] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:55,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:39:55,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 5] total 11 [2023-08-27 01:39:55,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271596517] [2023-08-27 01:39:55,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:39:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:39:55,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:39:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:39:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:39:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:56,576 INFO L124 PetriNetUnfolderBase]: 1473/2371 cut-off events. [2023-08-27 01:39:56,576 INFO L125 PetriNetUnfolderBase]: For 10026/10026 co-relation queries the response was YES. [2023-08-27 01:39:56,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10423 conditions, 2371 events. 1473/2371 cut-off events. For 10026/10026 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11952 event pairs, 57 based on Foata normal form. 18/2389 useless extension candidates. Maximal degree in co-relation 8311. Up to 1117 conditions per place. [2023-08-27 01:39:56,596 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 154 selfloop transitions, 57 changer transitions 3/214 dead transitions. [2023-08-27 01:39:56,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 214 transitions, 1882 flow [2023-08-27 01:39:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 01:39:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 01:39:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1030 transitions. [2023-08-27 01:39:56,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983067247218191 [2023-08-27 01:39:56,600 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1030 transitions. [2023-08-27 01:39:56,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1030 transitions. [2023-08-27 01:39:56,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:56,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1030 transitions. [2023-08-27 01:39:56,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.23076923076923) internal successors, (1030), 13 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 01:39:56,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states 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 01:39:56,607 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states 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 01:39:56,607 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 530 flow. Second operand 13 states and 1030 transitions. [2023-08-27 01:39:56,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 214 transitions, 1882 flow [2023-08-27 01:39:56,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 214 transitions, 1842 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-08-27 01:39:56,640 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 1252 flow [2023-08-27 01:39:56,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1252, PETRI_PLACES=81, PETRI_TRANSITIONS=106} [2023-08-27 01:39:56,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2023-08-27 01:39:56,641 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 1252 flow [2023-08-27 01:39:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:56,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:56,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:56,649 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 01:39:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:56,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:56,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1858455883, now seen corresponding path program 2 times [2023-08-27 01:39:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398123364] [2023-08-27 01:39:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:57,012 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 01:39:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:57,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398123364] [2023-08-27 01:39:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398123364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:57,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 01:39:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147906543] [2023-08-27 01:39:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:39:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:39:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:39:57,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:39:57,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 106 transitions, 1252 flow. Second operand has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:39:57,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:57,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:39:57,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:57,388 INFO L124 PetriNetUnfolderBase]: 1571/2493 cut-off events. [2023-08-27 01:39:57,389 INFO L125 PetriNetUnfolderBase]: For 20586/20586 co-relation queries the response was YES. [2023-08-27 01:39:57,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14034 conditions, 2493 events. 1571/2493 cut-off events. For 20586/20586 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12243 event pairs, 268 based on Foata normal form. 94/2587 useless extension candidates. Maximal degree in co-relation 13706. Up to 1863 conditions per place. [2023-08-27 01:39:57,417 INFO L140 encePairwiseOnDemand]: 153/159 looper letters, 108 selfloop transitions, 26 changer transitions 3/137 dead transitions. [2023-08-27 01:39:57,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1659 flow [2023-08-27 01:39:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:39:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:39:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-08-27 01:39:57,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182389937106918 [2023-08-27 01:39:57,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-08-27 01:39:57,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-08-27 01:39:57,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:57,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-08-27 01:39:57,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 01:39:57,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:39:57,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:39:57,422 INFO L175 Difference]: Start difference. First operand has 81 places, 106 transitions, 1252 flow. Second operand 5 states and 412 transitions. [2023-08-27 01:39:57,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1659 flow [2023-08-27 01:39:57,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 137 transitions, 1409 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-08-27 01:39:57,499 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 1029 flow [2023-08-27 01:39:57,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1029, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2023-08-27 01:39:57,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-08-27 01:39:57,500 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 1029 flow [2023-08-27 01:39:57,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:39:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 01:39:57,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:57,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash -935682643, now seen corresponding path program 1 times [2023-08-27 01:39:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:57,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156435321] [2023-08-27 01:39:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:57,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:57,694 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 01:39:57,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156435321] [2023-08-27 01:39:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156435321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:57,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:57,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:39:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908501081] [2023-08-27 01:39:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:39:57,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:39:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:39:57,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 01:39:57,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 1029 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:39:57,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:57,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 01:39:57,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:58,219 INFO L124 PetriNetUnfolderBase]: 2116/3375 cut-off events. [2023-08-27 01:39:58,220 INFO L125 PetriNetUnfolderBase]: For 24698/24698 co-relation queries the response was YES. [2023-08-27 01:39:58,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17614 conditions, 3375 events. 2116/3375 cut-off events. For 24698/24698 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18239 event pairs, 363 based on Foata normal form. 42/3417 useless extension candidates. Maximal degree in co-relation 14491. Up to 1546 conditions per place. [2023-08-27 01:39:58,259 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 171 selfloop transitions, 69 changer transitions 12/252 dead transitions. [2023-08-27 01:39:58,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 252 transitions, 3090 flow [2023-08-27 01:39:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:39:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:39:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 501 transitions. [2023-08-27 01:39:58,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2023-08-27 01:39:58,261 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 501 transitions. [2023-08-27 01:39:58,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 501 transitions. [2023-08-27 01:39:58,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:58,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 501 transitions. [2023-08-27 01:39:58,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 01:39:58,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 01:39:58,265 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 01:39:58,265 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 1029 flow. Second operand 6 states and 501 transitions. [2023-08-27 01:39:58,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 252 transitions, 3090 flow [2023-08-27 01:39:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 252 transitions, 3018 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:39:58,307 INFO L231 Difference]: Finished difference. Result has 85 places, 159 transitions, 2003 flow [2023-08-27 01:39:58,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2003, PETRI_PLACES=85, PETRI_TRANSITIONS=159} [2023-08-27 01:39:58,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-27 01:39:58,308 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 159 transitions, 2003 flow [2023-08-27 01:39:58,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:39:58,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:58,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 01:39:58,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:58,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1043019375, now seen corresponding path program 2 times [2023-08-27 01:39:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158905006] [2023-08-27 01:39:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:58,455 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 01:39:58,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:58,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158905006] [2023-08-27 01:39:58,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158905006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:39:58,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:39:58,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:39:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627381397] [2023-08-27 01:39:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:39:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:39:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:39:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:39:58,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 01:39:58,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 159 transitions, 2003 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:39:58,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:58,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 01:39:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:59,096 INFO L124 PetriNetUnfolderBase]: 2480/4074 cut-off events. [2023-08-27 01:39:59,096 INFO L125 PetriNetUnfolderBase]: For 35287/35287 co-relation queries the response was YES. [2023-08-27 01:39:59,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 4074 events. 2480/4074 cut-off events. For 35287/35287 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23491 event pairs, 657 based on Foata normal form. 72/4146 useless extension candidates. Maximal degree in co-relation 21063. Up to 2049 conditions per place. [2023-08-27 01:39:59,128 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 142 selfloop transitions, 91 changer transitions 5/238 dead transitions. [2023-08-27 01:39:59,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 238 transitions, 3256 flow [2023-08-27 01:39:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:39:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:39:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-08-27 01:39:59,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-27 01:39:59,131 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-08-27 01:39:59,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-08-27 01:39:59,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:59,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-08-27 01:39:59,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 01:39:59,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:39:59,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:39:59,134 INFO L175 Difference]: Start difference. First operand has 85 places, 159 transitions, 2003 flow. Second operand 5 states and 421 transitions. [2023-08-27 01:39:59,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 238 transitions, 3256 flow [2023-08-27 01:39:59,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 238 transitions, 3246 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-27 01:39:59,241 INFO L231 Difference]: Finished difference. Result has 92 places, 173 transitions, 2547 flow [2023-08-27 01:39:59,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2547, PETRI_PLACES=92, PETRI_TRANSITIONS=173} [2023-08-27 01:39:59,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-27 01:39:59,244 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 173 transitions, 2547 flow [2023-08-27 01:39:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:39:59,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:39:59,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:39:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 01:39:59,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:39:59,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:39:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash -408418431, now seen corresponding path program 3 times [2023-08-27 01:39:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:39:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54121863] [2023-08-27 01:39:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:39:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:39:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:39:59,481 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 01:39:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:39:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54121863] [2023-08-27 01:39:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54121863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:39:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992335458] [2023-08-27 01:39:59,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:39:59,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:39:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:39:59,489 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 01:39:59,514 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 01:39:59,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:39:59,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:39:59,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:39:59,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:39:59,720 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 01:39:59,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:39:59,900 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 01:39:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992335458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:39:59,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:39:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-08-27 01:39:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755215635] [2023-08-27 01:39:59,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:39:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:39:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:39:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:39:59,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 01:39:59,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 173 transitions, 2547 flow. Second operand has 11 states, 11 states have (on average 69.45454545454545) internal successors, (764), 11 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 01:39:59,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:59,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 01:39:59,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:01,948 INFO L124 PetriNetUnfolderBase]: 4529/7336 cut-off events. [2023-08-27 01:40:01,948 INFO L125 PetriNetUnfolderBase]: For 81578/81578 co-relation queries the response was YES. [2023-08-27 01:40:01,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47161 conditions, 7336 events. 4529/7336 cut-off events. For 81578/81578 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46181 event pairs, 301 based on Foata normal form. 145/7481 useless extension candidates. Maximal degree in co-relation 41548. Up to 2140 conditions per place. [2023-08-27 01:40:02,124 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 335 selfloop transitions, 278 changer transitions 49/662 dead transitions. [2023-08-27 01:40:02,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 662 transitions, 8890 flow [2023-08-27 01:40:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 01:40:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 01:40:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2019 transitions. [2023-08-27 01:40:02,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488388969521045 [2023-08-27 01:40:02,130 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2019 transitions. [2023-08-27 01:40:02,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2019 transitions. [2023-08-27 01:40:02,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:02,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2019 transitions. [2023-08-27 01:40:02,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states 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 01:40:02,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 159.0) internal successors, (4293), 27 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states 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 01:40:02,142 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 159.0) internal successors, (4293), 27 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states 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 01:40:02,143 INFO L175 Difference]: Start difference. First operand has 92 places, 173 transitions, 2547 flow. Second operand 26 states and 2019 transitions. [2023-08-27 01:40:02,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 662 transitions, 8890 flow [2023-08-27 01:40:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 662 transitions, 8602 flow, removed 67 selfloop flow, removed 2 redundant places. [2023-08-27 01:40:02,450 INFO L231 Difference]: Finished difference. Result has 134 places, 372 transitions, 6623 flow [2023-08-27 01:40:02,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6623, PETRI_PLACES=134, PETRI_TRANSITIONS=372} [2023-08-27 01:40:02,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2023-08-27 01:40:02,451 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 372 transitions, 6623 flow [2023-08-27 01:40:02,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 69.45454545454545) internal successors, (764), 11 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 01:40:02,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:02,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:02,464 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 01:40:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:02,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:02,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1832060313, now seen corresponding path program 4 times [2023-08-27 01:40:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243205640] [2023-08-27 01:40:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:02,871 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 01:40:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243205640] [2023-08-27 01:40:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243205640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:40:02,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:40:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:40:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719201629] [2023-08-27 01:40:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:40:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:40:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:40:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:40:02,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 01:40:02,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 372 transitions, 6623 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:40:02,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:02,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 01:40:02,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:04,107 INFO L124 PetriNetUnfolderBase]: 4259/6844 cut-off events. [2023-08-27 01:40:04,107 INFO L125 PetriNetUnfolderBase]: For 116032/116032 co-relation queries the response was YES. [2023-08-27 01:40:04,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51158 conditions, 6844 events. 4259/6844 cut-off events. For 116032/116032 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42101 event pairs, 1196 based on Foata normal form. 76/6920 useless extension candidates. Maximal degree in co-relation 50197. Up to 4030 conditions per place. [2023-08-27 01:40:04,182 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 241 selfloop transitions, 170 changer transitions 7/418 dead transitions. [2023-08-27 01:40:04,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 418 transitions, 7793 flow [2023-08-27 01:40:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:40:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:40:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2023-08-27 01:40:04,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2023-08-27 01:40:04,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2023-08-27 01:40:04,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2023-08-27 01:40:04,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:04,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2023-08-27 01:40:04,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 01:40:04,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:40:04,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:40:04,187 INFO L175 Difference]: Start difference. First operand has 134 places, 372 transitions, 6623 flow. Second operand 5 states and 425 transitions. [2023-08-27 01:40:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 418 transitions, 7793 flow [2023-08-27 01:40:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 418 transitions, 7161 flow, removed 309 selfloop flow, removed 2 redundant places. [2023-08-27 01:40:04,648 INFO L231 Difference]: Finished difference. Result has 137 places, 360 transitions, 6199 flow [2023-08-27 01:40:04,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6199, PETRI_PLACES=137, PETRI_TRANSITIONS=360} [2023-08-27 01:40:04,650 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-08-27 01:40:04,650 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 360 transitions, 6199 flow [2023-08-27 01:40:04,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 01:40:04,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:04,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:04,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 01:40:04,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:04,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1456693785, now seen corresponding path program 5 times [2023-08-27 01:40:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:04,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497177213] [2023-08-27 01:40:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:04,791 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 01:40:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497177213] [2023-08-27 01:40:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497177213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:40:04,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:40:04,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 01:40:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197489321] [2023-08-27 01:40:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:40:04,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:40:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:40:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:40:04,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:40:04,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 360 transitions, 6199 flow. Second operand has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:40:04,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:04,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:40:04,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:06,082 INFO L124 PetriNetUnfolderBase]: 4355/7033 cut-off events. [2023-08-27 01:40:06,082 INFO L125 PetriNetUnfolderBase]: For 112454/112454 co-relation queries the response was YES. [2023-08-27 01:40:06,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52470 conditions, 7033 events. 4355/7033 cut-off events. For 112454/112454 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 43458 event pairs, 779 based on Foata normal form. 4/7037 useless extension candidates. Maximal degree in co-relation 51574. Up to 6606 conditions per place. [2023-08-27 01:40:06,148 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 402 selfloop transitions, 23 changer transitions 8/433 dead transitions. [2023-08-27 01:40:06,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 433 transitions, 7974 flow [2023-08-27 01:40:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:40:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:40:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 480 transitions. [2023-08-27 01:40:06,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2023-08-27 01:40:06,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 480 transitions. [2023-08-27 01:40:06,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 480 transitions. [2023-08-27 01:40:06,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:06,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 480 transitions. [2023-08-27 01:40:06,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:40:06,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 01:40:06,154 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 01:40:06,154 INFO L175 Difference]: Start difference. First operand has 137 places, 360 transitions, 6199 flow. Second operand 6 states and 480 transitions. [2023-08-27 01:40:06,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 433 transitions, 7974 flow [2023-08-27 01:40:06,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 433 transitions, 7597 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 01:40:06,573 INFO L231 Difference]: Finished difference. Result has 141 places, 367 transitions, 6051 flow [2023-08-27 01:40:06,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6051, PETRI_PLACES=141, PETRI_TRANSITIONS=367} [2023-08-27 01:40:06,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-08-27 01:40:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 367 transitions, 6051 flow [2023-08-27 01:40:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:40:06,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:06,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:06,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 01:40:06,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:06,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1121196403, now seen corresponding path program 6 times [2023-08-27 01:40:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:06,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805649822] [2023-08-27 01:40:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:06,681 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 01:40:06,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805649822] [2023-08-27 01:40:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805649822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:40:06,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:40:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 01:40:06,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476759155] [2023-08-27 01:40:06,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:40:06,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:40:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:40:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:40:06,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 01:40:06,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 367 transitions, 6051 flow. Second operand has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:40:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:06,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 01:40:06,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:07,720 INFO L124 PetriNetUnfolderBase]: 4191/6643 cut-off events. [2023-08-27 01:40:07,720 INFO L125 PetriNetUnfolderBase]: For 102699/102699 co-relation queries the response was YES. [2023-08-27 01:40:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49657 conditions, 6643 events. 4191/6643 cut-off events. For 102699/102699 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39436 event pairs, 755 based on Foata normal form. 4/6647 useless extension candidates. Maximal degree in co-relation 48889. Up to 6562 conditions per place. [2023-08-27 01:40:07,773 INFO L140 encePairwiseOnDemand]: 153/159 looper letters, 345 selfloop transitions, 17 changer transitions 7/369 dead transitions. [2023-08-27 01:40:07,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 369 transitions, 6708 flow [2023-08-27 01:40:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:40:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:40:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-27 01:40:07,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48553459119496856 [2023-08-27 01:40:07,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-27 01:40:07,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-27 01:40:07,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:07,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-27 01:40:07,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 01:40:07,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:40:07,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 01:40:07,778 INFO L175 Difference]: Start difference. First operand has 141 places, 367 transitions, 6051 flow. Second operand 5 states and 386 transitions. [2023-08-27 01:40:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 369 transitions, 6708 flow [2023-08-27 01:40:08,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 369 transitions, 6361 flow, removed 150 selfloop flow, removed 5 redundant places. [2023-08-27 01:40:08,256 INFO L231 Difference]: Finished difference. Result has 141 places, 357 transitions, 5589 flow [2023-08-27 01:40:08,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5589, PETRI_PLACES=141, PETRI_TRANSITIONS=357} [2023-08-27 01:40:08,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-08-27 01:40:08,256 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 357 transitions, 5589 flow [2023-08-27 01:40:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 01:40:08,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:08,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 01:40:08,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:08,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1748652507, now seen corresponding path program 1 times [2023-08-27 01:40:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:08,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288137097] [2023-08-27 01:40:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288137097] [2023-08-27 01:40:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288137097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:40:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659669280] [2023-08-27 01:40:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:40:08,561 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 01:40:08,563 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 01:40:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:08,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:40:08,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:40:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:08,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:40:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659669280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:40:09,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:40:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-27 01:40:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398297586] [2023-08-27 01:40:09,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:40:09,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 01:40:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 01:40:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:40:09,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 01:40:09,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 357 transitions, 5589 flow. Second operand has 12 states, 12 states have (on average 69.25) internal successors, (831), 12 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 01:40:09,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:09,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 01:40:09,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:10,660 INFO L124 PetriNetUnfolderBase]: 5117/8297 cut-off events. [2023-08-27 01:40:10,660 INFO L125 PetriNetUnfolderBase]: For 117145/117145 co-relation queries the response was YES. [2023-08-27 01:40:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59935 conditions, 8297 events. 5117/8297 cut-off events. For 117145/117145 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 53187 event pairs, 314 based on Foata normal form. 10/8307 useless extension candidates. Maximal degree in co-relation 59041. Up to 4925 conditions per place. [2023-08-27 01:40:10,736 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 403 selfloop transitions, 203 changer transitions 6/612 dead transitions. [2023-08-27 01:40:10,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 612 transitions, 10613 flow [2023-08-27 01:40:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 01:40:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 01:40:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 691 transitions. [2023-08-27 01:40:10,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48287910552061497 [2023-08-27 01:40:10,739 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 691 transitions. [2023-08-27 01:40:10,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 691 transitions. [2023-08-27 01:40:10,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:10,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 691 transitions. [2023-08-27 01:40:10,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.77777777777777) internal successors, (691), 9 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 01:40:10,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 01:40:10,743 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 01:40:10,743 INFO L175 Difference]: Start difference. First operand has 141 places, 357 transitions, 5589 flow. Second operand 9 states and 691 transitions. [2023-08-27 01:40:10,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 612 transitions, 10613 flow [2023-08-27 01:40:11,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 612 transitions, 10392 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-27 01:40:11,390 INFO L231 Difference]: Finished difference. Result has 145 places, 460 transitions, 8209 flow [2023-08-27 01:40:11,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8209, PETRI_PLACES=145, PETRI_TRANSITIONS=460} [2023-08-27 01:40:11,391 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2023-08-27 01:40:11,391 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 460 transitions, 8209 flow [2023-08-27 01:40:11,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.25) internal successors, (831), 12 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 01:40:11,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:11,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:11,397 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 01:40:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:11,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:11,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -150896881, now seen corresponding path program 2 times [2023-08-27 01:40:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:11,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027580503] [2023-08-27 01:40:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:11,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027580503] [2023-08-27 01:40:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027580503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:40:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425592571] [2023-08-27 01:40:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:40:11,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:40:11,968 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 01:40:11,970 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 01:40:12,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:40:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:40:12,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:40:12,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:40:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:12,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:40:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425592571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:40:12,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:40:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-27 01:40:12,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444384302] [2023-08-27 01:40:12,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:40:12,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 01:40:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 01:40:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:40:12,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 01:40:12,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 460 transitions, 8209 flow. Second operand has 12 states, 12 states have (on average 69.25) internal successors, (831), 12 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 01:40:12,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:12,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 01:40:12,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:14,840 INFO L124 PetriNetUnfolderBase]: 5703/9231 cut-off events. [2023-08-27 01:40:14,840 INFO L125 PetriNetUnfolderBase]: For 151578/151578 co-relation queries the response was YES. [2023-08-27 01:40:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69740 conditions, 9231 events. 5703/9231 cut-off events. For 151578/151578 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 60349 event pairs, 456 based on Foata normal form. 10/9241 useless extension candidates. Maximal degree in co-relation 68761. Up to 6725 conditions per place. [2023-08-27 01:40:14,903 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 428 selfloop transitions, 210 changer transitions 7/645 dead transitions. [2023-08-27 01:40:14,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 645 transitions, 12374 flow [2023-08-27 01:40:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 01:40:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 01:40:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 814 transitions. [2023-08-27 01:40:14,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-08-27 01:40:14,916 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 814 transitions. [2023-08-27 01:40:14,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 814 transitions. [2023-08-27 01:40:14,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:14,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 814 transitions. [2023-08-27 01:40:14,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states 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 01:40:14,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 01:40:14,921 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 01:40:14,921 INFO L175 Difference]: Start difference. First operand has 145 places, 460 transitions, 8209 flow. Second operand 11 states and 814 transitions. [2023-08-27 01:40:14,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 645 transitions, 12374 flow [2023-08-27 01:40:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 645 transitions, 11853 flow, removed 249 selfloop flow, removed 2 redundant places. [2023-08-27 01:40:15,609 INFO L231 Difference]: Finished difference. Result has 158 places, 544 transitions, 10075 flow [2023-08-27 01:40:15,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=7780, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10075, PETRI_PLACES=158, PETRI_TRANSITIONS=544} [2023-08-27 01:40:15,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2023-08-27 01:40:15,610 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 544 transitions, 10075 flow [2023-08-27 01:40:15,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.25) internal successors, (831), 12 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 01:40:15,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:15,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:15,615 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 01:40:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 01:40:15,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:15,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -527243925, now seen corresponding path program 1 times [2023-08-27 01:40:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:15,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145437624] [2023-08-27 01:40:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145437624] [2023-08-27 01:40:16,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145437624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:40:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874353148] [2023-08-27 01:40:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:16,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:40:16,033 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 01:40:16,036 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 01:40:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:16,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 01:40:16,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:40:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:16,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:40:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:16,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874353148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:40:16,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:40:16,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 19 [2023-08-27 01:40:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291401871] [2023-08-27 01:40:16,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:40:16,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:40:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:40:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:40:16,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:40:16,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 544 transitions, 10075 flow. Second operand has 20 states, 20 states have (on average 69.5) internal successors, (1390), 20 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 01:40:16,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:16,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:40:16,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:25,869 INFO L124 PetriNetUnfolderBase]: 17548/27650 cut-off events. [2023-08-27 01:40:25,869 INFO L125 PetriNetUnfolderBase]: For 600758/600758 co-relation queries the response was YES. [2023-08-27 01:40:26,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218752 conditions, 27650 events. 17548/27650 cut-off events. For 600758/600758 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 201137 event pairs, 477 based on Foata normal form. 1776/29426 useless extension candidates. Maximal degree in co-relation 217070. Up to 6891 conditions per place. [2023-08-27 01:40:26,262 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 879 selfloop transitions, 1892 changer transitions 0/2771 dead transitions. [2023-08-27 01:40:26,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 2771 transitions, 51757 flow [2023-08-27 01:40:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-27 01:40:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-27 01:40:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5485 transitions. [2023-08-27 01:40:26,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858712020550979 [2023-08-27 01:40:26,274 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5485 transitions. [2023-08-27 01:40:26,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5485 transitions. [2023-08-27 01:40:26,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:26,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5485 transitions. [2023-08-27 01:40:26,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 77.25352112676056) internal successors, (5485), 71 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states 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 01:40:26,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 159.0) internal successors, (11448), 72 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states 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 01:40:26,297 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 159.0) internal successors, (11448), 72 states have internal predecessors, (11448), 0 states have call successors, (0), 0 states 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 01:40:26,297 INFO L175 Difference]: Start difference. First operand has 158 places, 544 transitions, 10075 flow. Second operand 71 states and 5485 transitions. [2023-08-27 01:40:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 2771 transitions, 51757 flow [2023-08-27 01:40:29,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 2771 transitions, 50788 flow, removed 473 selfloop flow, removed 10 redundant places. [2023-08-27 01:40:29,683 INFO L231 Difference]: Finished difference. Result has 254 places, 2184 transitions, 46923 flow [2023-08-27 01:40:29,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=46923, PETRI_PLACES=254, PETRI_TRANSITIONS=2184} [2023-08-27 01:40:29,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-08-27 01:40:29,684 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 2184 transitions, 46923 flow [2023-08-27 01:40:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.5) internal successors, (1390), 20 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 01:40:29,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:40:29,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:29,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 01:40:29,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 01:40:29,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:40:29,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:40:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash -651011781, now seen corresponding path program 2 times [2023-08-27 01:40:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:40:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564160161] [2023-08-27 01:40:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:40:29,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:40:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:40:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:40:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564160161] [2023-08-27 01:40:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564160161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:40:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774042872] [2023-08-27 01:40:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:40:30,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:30,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:40:30,108 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 01:40:30,111 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 01:40:30,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:40:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:40:30,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 01:40:30,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:40:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:30,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:40:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:40:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774042872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:40:30,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:40:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2023-08-27 01:40:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92059031] [2023-08-27 01:40:30,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:40:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 01:40:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:40:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 01:40:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:40:30,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:40:30,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 2184 transitions, 46923 flow. Second operand has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:40:30,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:40:30,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:40:30,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:40:46,111 INFO L124 PetriNetUnfolderBase]: 20338/32203 cut-off events. [2023-08-27 01:40:46,111 INFO L125 PetriNetUnfolderBase]: For 829162/829162 co-relation queries the response was YES. [2023-08-27 01:40:46,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296380 conditions, 32203 events. 20338/32203 cut-off events. For 829162/829162 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 241916 event pairs, 357 based on Foata normal form. 172/32375 useless extension candidates. Maximal degree in co-relation 293206. Up to 7803 conditions per place. [2023-08-27 01:40:46,528 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 1249 selfloop transitions, 2436 changer transitions 1/3686 dead transitions. [2023-08-27 01:40:46,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 3686 transitions, 82649 flow [2023-08-27 01:40:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-27 01:40:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-27 01:40:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4060 transitions. [2023-08-27 01:40:46,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48178473952770856 [2023-08-27 01:40:46,534 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4060 transitions. [2023-08-27 01:40:46,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4060 transitions. [2023-08-27 01:40:46,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:40:46,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4060 transitions. [2023-08-27 01:40:46,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 76.60377358490567) internal successors, (4060), 53 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states 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 01:40:46,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 159.0) internal successors, (8586), 54 states have internal predecessors, (8586), 0 states have call successors, (0), 0 states 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 01:40:46,549 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 159.0) internal successors, (8586), 54 states have internal predecessors, (8586), 0 states have call successors, (0), 0 states 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 01:40:46,549 INFO L175 Difference]: Start difference. First operand has 254 places, 2184 transitions, 46923 flow. Second operand 53 states and 4060 transitions. [2023-08-27 01:40:46,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 3686 transitions, 82649 flow [2023-08-27 01:41:11,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 3686 transitions, 70186 flow, removed 5893 selfloop flow, removed 3 redundant places. [2023-08-27 01:41:11,564 INFO L231 Difference]: Finished difference. Result has 343 places, 3190 transitions, 67618 flow [2023-08-27 01:41:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=38677, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=67618, PETRI_PLACES=343, PETRI_TRANSITIONS=3190} [2023-08-27 01:41:11,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2023-08-27 01:41:11,567 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 3190 transitions, 67618 flow [2023-08-27 01:41:11,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:41:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:41:11,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:41:11,576 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 01:41:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:41:11,773 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:41:11,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:41:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 353808511, now seen corresponding path program 3 times [2023-08-27 01:41:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:41:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537147590] [2023-08-27 01:41:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:41:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:41:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:41:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:41:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:41:11,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537147590] [2023-08-27 01:41:11,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537147590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:41:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673458211] [2023-08-27 01:41:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:41:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:41:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:41:11,964 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 01:41:11,967 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 01:41:12,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:41:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:41:12,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 01:41:12,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:41:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:41:12,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:41:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:41:12,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673458211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:41:12,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:41:12,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-27 01:41:12,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902282524] [2023-08-27 01:41:12,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:41:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:41:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:41:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:41:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:41:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:41:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 3190 transitions, 67618 flow. Second operand has 20 states, 20 states have (on average 69.35) internal successors, (1387), 20 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 01:41:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:41:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:41:12,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:41:48,758 INFO L124 PetriNetUnfolderBase]: 30393/48708 cut-off events. [2023-08-27 01:41:48,758 INFO L125 PetriNetUnfolderBase]: For 1394454/1394454 co-relation queries the response was YES. [2023-08-27 01:41:49,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454463 conditions, 48708 events. 30393/48708 cut-off events. For 1394454/1394454 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 393795 event pairs, 521 based on Foata normal form. 912/49620 useless extension candidates. Maximal degree in co-relation 452875. Up to 10074 conditions per place. [2023-08-27 01:41:50,209 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 1701 selfloop transitions, 4230 changer transitions 0/5931 dead transitions. [2023-08-27 01:41:50,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 5931 transitions, 137311 flow [2023-08-27 01:41:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-27 01:41:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-27 01:41:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5431 transitions. [2023-08-27 01:41:50,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879604672057502 [2023-08-27 01:41:50,216 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5431 transitions. [2023-08-27 01:41:50,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5431 transitions. [2023-08-27 01:41:50,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:41:50,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5431 transitions. [2023-08-27 01:41:50,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 77.58571428571429) internal successors, (5431), 70 states have internal predecessors, (5431), 0 states have call successors, (0), 0 states 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 01:41:50,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 159.0) internal successors, (11289), 71 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states 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 01:41:50,234 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 159.0) internal successors, (11289), 71 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states 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 01:41:50,235 INFO L175 Difference]: Start difference. First operand has 343 places, 3190 transitions, 67618 flow. Second operand 70 states and 5431 transitions. [2023-08-27 01:41:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 5931 transitions, 137311 flow [2023-08-27 01:43:02,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 5931 transitions, 131712 flow, removed 2303 selfloop flow, removed 3 redundant places. [2023-08-27 01:43:02,239 INFO L231 Difference]: Finished difference. Result has 461 places, 5281 transitions, 128085 flow [2023-08-27 01:43:02,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=63557, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=128085, PETRI_PLACES=461, PETRI_TRANSITIONS=5281} [2023-08-27 01:43:02,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2023-08-27 01:43:02,242 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 5281 transitions, 128085 flow [2023-08-27 01:43:02,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.35) internal successors, (1387), 20 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 01:43:02,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:43:02,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:43:02,255 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 01:43:02,449 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,SelfDestructingSolverStorable16 [2023-08-27 01:43:02,450 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:43:02,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:43:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash 165961575, now seen corresponding path program 4 times [2023-08-27 01:43:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:43:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838228784] [2023-08-27 01:43:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:43:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:43:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:43:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:43:02,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:43:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838228784] [2023-08-27 01:43:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838228784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:43:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142860643] [2023-08-27 01:43:02,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:43:02,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:43:02,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:43:02,571 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 01:43:02,574 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 01:43:02,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:43:02,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:43:02,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:43:02,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:43:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:43:02,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:43:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:43:02,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142860643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:43:02,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:43:02,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-27 01:43:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112900193] [2023-08-27 01:43:02,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:43:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:43:02,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:43:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:43:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:43:02,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:43:02,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 5281 transitions, 128085 flow. Second operand has 17 states, 17 states have (on average 69.47058823529412) internal successors, (1181), 17 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states 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 01:43:02,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:43:02,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:43:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:35,697 INFO L124 PetriNetUnfolderBase]: 44452/71994 cut-off events. [2023-08-27 01:44:35,697 INFO L125 PetriNetUnfolderBase]: For 2657556/2657556 co-relation queries the response was YES. [2023-08-27 01:44:39,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769628 conditions, 71994 events. 44452/71994 cut-off events. For 2657556/2657556 co-relation queries the response was YES. Maximal size of possible extension queue 3711. Compared 627908 event pairs, 529 based on Foata normal form. 510/72504 useless extension candidates. Maximal degree in co-relation 768203. Up to 13757 conditions per place. [2023-08-27 01:44:39,504 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 2869 selfloop transitions, 6314 changer transitions 6/9189 dead transitions. [2023-08-27 01:44:39,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 9189 transitions, 244611 flow [2023-08-27 01:44:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-27 01:44:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-27 01:44:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5590 transitions. [2023-08-27 01:44:39,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816059274575687 [2023-08-27 01:44:39,510 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5590 transitions. [2023-08-27 01:44:39,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5590 transitions. [2023-08-27 01:44:39,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:39,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5590 transitions. [2023-08-27 01:44:39,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 76.57534246575342) internal successors, (5590), 73 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states 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 01:44:39,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 159.0) internal successors, (11766), 74 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states 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 01:44:39,528 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 159.0) internal successors, (11766), 74 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states 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 01:44:39,528 INFO L175 Difference]: Start difference. First operand has 461 places, 5281 transitions, 128085 flow. Second operand 73 states and 5590 transitions. [2023-08-27 01:44:39,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 9189 transitions, 244611 flow [2023-08-27 01:48:59,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 9189 transitions, 233592 flow, removed 5485 selfloop flow, removed 4 redundant places. [2023-08-27 01:48:59,202 INFO L231 Difference]: Finished difference. Result has 581 places, 8125 transitions, 217352 flow [2023-08-27 01:48:59,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=121925, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=217352, PETRI_PLACES=581, PETRI_TRANSITIONS=8125} [2023-08-27 01:48:59,205 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 551 predicate places. [2023-08-27 01:48:59,205 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 8125 transitions, 217352 flow [2023-08-27 01:48:59,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.47058823529412) internal successors, (1181), 17 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states 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 01:48:59,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:48:59,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:48:59,210 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 01:48:59,406 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,SelfDestructingSolverStorable17 [2023-08-27 01:48:59,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 01:48:59,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:48:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 981867539, now seen corresponding path program 5 times [2023-08-27 01:48:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:48:59,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254555519] [2023-08-27 01:48:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:48:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:48:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:48:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:48:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:48:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254555519] [2023-08-27 01:48:59,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254555519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:48:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857827322] [2023-08-27 01:48:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:48:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:48:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:48:59,562 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 01:48:59,565 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 01:48:59,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:48:59,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:48:59,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:48:59,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:48:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:48:59,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:49:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:49:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857827322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:49:00,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:49:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-27 01:49:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597472312] [2023-08-27 01:49:00,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:49:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:49:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:49:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:49:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:49:00,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 01:49:00,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 8125 transitions, 217352 flow. Second operand has 20 states, 20 states have (on average 69.45) internal successors, (1389), 20 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 01:49:00,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:49:00,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 01:49:00,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 01:52:56,206 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:52:56,207 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:52:57,221 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 [2023-08-27 01:52:57,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown