/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --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 14:50:37,889 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:50:37,972 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 14:50:37,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:50:37,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:50:38,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:50:38,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:50:38,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:50:38,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:50:38,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:50:38,044 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:50:38,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:50:38,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:50:38,045 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:50:38,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:50:38,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:50:38,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:50:38,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:50:38,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:50:38,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:50:38,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:50:38,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:50:38,053 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:50:38,053 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:50:38,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:50:38,054 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:50:38,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:50:38,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:50:38,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:50:38,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:50:38,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:50:38,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:50:38,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:50:38,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:50:38,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:50:38,057 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:50:38,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:50:38,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:50:38,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:50:38,366 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:50:38,366 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:50:38,367 INFO L431 ainManager$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 14:50:39,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:50:39,857 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:50:39,857 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-27 14:50:39,868 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f40c1c074/857337b124e747538f30c775554cbd87/FLAG682e022ae [2023-08-27 14:50:39,884 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f40c1c074/857337b124e747538f30c775554cbd87 [2023-08-27 14:50:39,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:50:39,890 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:50:39,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:50:39,891 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:50:39,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:50:39,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:50:39" (1/1) ... [2023-08-27 14:50:39,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a5f89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:39, skipping insertion in model container [2023-08-27 14:50:39,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:50:39" (1/1) ... [2023-08-27 14:50:39,916 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:50:40,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:50:40,101 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:50:40,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:50:40,146 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:50:40,146 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:50:40,154 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:50:40,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40 WrapperNode [2023-08-27 14:50:40,154 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:50:40,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:50:40,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:50:40,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:50:40,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,188 INFO L138 Inliner]: procedures = 22, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-27 14:50:40,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:50:40,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:50:40,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:50:40,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:50:40,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:50:40,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:50:40,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:50:40,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:50:40,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (1/1) ... [2023-08-27 14:50:40,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:50:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:40,242 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 14:50:40,244 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 14:50:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:50:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:50:40,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:50:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:50:40,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:50:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:50:40,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:50:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:50:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:50:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:50:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:50:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:50:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:50:40,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:50:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:50:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:50:40,272 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 14:50:40,358 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:50:40,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:50:40,581 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:50:40,661 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:50:40,661 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 14:50:40,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:50:40 BoogieIcfgContainer [2023-08-27 14:50:40,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:50:40,665 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:50:40,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:50:40,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:50:40,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:50:39" (1/3) ... [2023-08-27 14:50:40,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13225ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:50:40, skipping insertion in model container [2023-08-27 14:50:40,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:40" (2/3) ... [2023-08-27 14:50:40,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13225ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:50:40, skipping insertion in model container [2023-08-27 14:50:40,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:50:40" (3/3) ... [2023-08-27 14:50:40,675 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-27 14:50:40,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:50:40,693 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 14:50:40,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:50:40,799 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 14:50:40,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 214 flow [2023-08-27 14:50:40,889 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2023-08-27 14:50:40,889 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:50:40,894 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 14:50:40,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 95 transitions, 214 flow [2023-08-27 14:50:40,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 81 transitions, 180 flow [2023-08-27 14:50:40,906 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:50:40,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-27 14:50:40,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-27 14:50:40,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 81 transitions, 180 flow [2023-08-27 14:50:40,975 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-08-27 14:50:40,975 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:50:40,978 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 14:50:40,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2023-08-27 14:50:43,393 INFO L134 LiptonReduction]: Checked pairs total: 1272 [2023-08-27 14:50:43,394 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-27 14:50:43,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:50:43,411 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;@7e6001fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:50:43,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-27 14:50:43,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:50:43,418 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-27 14:50:43,418 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:50:43,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:43,418 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 14:50:43,419 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 14:50:43,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -107022905, now seen corresponding path program 1 times [2023-08-27 14:50:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986397592] [2023-08-27 14:50:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:44,031 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 14:50:44,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:44,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986397592] [2023-08-27 14:50:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986397592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:44,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:44,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:50:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066742162] [2023-08-27 14:50:44,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:44,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:50:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:44,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:50:44,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:50:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 159 [2023-08-27 14:50:44,068 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 14:50:44,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:44,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 159 [2023-08-27 14:50:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:44,216 INFO L124 PetriNetUnfolderBase]: 271/426 cut-off events. [2023-08-27 14:50:44,217 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-27 14:50:44,221 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 14:50:44,225 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-27 14:50:44,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 181 flow [2023-08-27 14:50:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:50:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:50:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-27 14:50:44,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-08-27 14:50:44,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-27 14:50:44,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-27 14:50:44,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:44,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-27 14:50:44,256 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 14:50:44,261 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 14:50:44,261 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 14:50:44,263 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 270 transitions. [2023-08-27 14:50:44,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 181 flow [2023-08-27 14:50:44,266 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 14:50:44,267 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-08-27 14:50:44,269 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 14:50:44,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-27 14:50:44,273 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-08-27 14:50:44,273 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 14:50:44,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:44,274 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 14:50:44,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:50:44,275 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 14:50:44,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 924106453, now seen corresponding path program 1 times [2023-08-27 14:50:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712297034] [2023-08-27 14:50:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:44,579 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 14:50:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712297034] [2023-08-27 14:50:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712297034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:44,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753761712] [2023-08-27 14:50:44,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:44,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:50:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:50:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:50:44,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:44,585 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 14:50:44,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:44,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:44,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:44,843 INFO L124 PetriNetUnfolderBase]: 459/707 cut-off events. [2023-08-27 14:50:44,844 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-27 14:50:44,845 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 14:50:44,849 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 72 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2023-08-27 14:50:44,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 84 transitions, 395 flow [2023-08-27 14:50:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:50:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:50:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 567 transitions. [2023-08-27 14:50:44,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-27 14:50:44,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 567 transitions. [2023-08-27 14:50:44,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 567 transitions. [2023-08-27 14:50:44,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:44,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 567 transitions. [2023-08-27 14:50:44,855 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 14:50:44,858 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 14:50:44,859 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 14:50:44,859 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 567 transitions. [2023-08-27 14:50:44,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 84 transitions, 395 flow [2023-08-27 14:50:44,860 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 14:50:44,862 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 154 flow [2023-08-27 14:50:44,862 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 14:50:44,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-27 14:50:44,863 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 154 flow [2023-08-27 14:50:44,863 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 14:50:44,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:44,863 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 14:50:44,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 14:50:44,864 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 14:50:44,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1821619291, now seen corresponding path program 2 times [2023-08-27 14:50:44,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:44,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771673064] [2023-08-27 14:50:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:45,026 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 14:50:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771673064] [2023-08-27 14:50:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771673064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:45,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:45,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:45,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828519487] [2023-08-27 14:50:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:45,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:45,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:45,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:45,029 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 14:50:45,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:45,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:45,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:45,354 INFO L124 PetriNetUnfolderBase]: 947/1447 cut-off events. [2023-08-27 14:50:45,354 INFO L125 PetriNetUnfolderBase]: For 825/825 co-relation queries the response was YES. [2023-08-27 14:50:45,357 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 14:50:45,365 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 96 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-08-27 14:50:45,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 115 transitions, 646 flow [2023-08-27 14:50:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:50:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:50:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 585 transitions. [2023-08-27 14:50:45,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2023-08-27 14:50:45,367 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 585 transitions. [2023-08-27 14:50:45,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 585 transitions. [2023-08-27 14:50:45,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:45,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 585 transitions. [2023-08-27 14:50:45,370 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 14:50:45,372 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 14:50:45,372 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 14:50:45,373 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 154 flow. Second operand 7 states and 585 transitions. [2023-08-27 14:50:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 115 transitions, 646 flow [2023-08-27 14:50:45,378 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 14:50:45,380 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 308 flow [2023-08-27 14:50:45,380 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 14:50:45,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-08-27 14:50:45,381 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 308 flow [2023-08-27 14:50:45,381 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 14:50:45,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:45,382 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 14:50:45,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 14:50:45,382 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 14:50:45,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 550661333, now seen corresponding path program 3 times [2023-08-27 14:50:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:45,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633212781] [2023-08-27 14:50:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:45,515 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 14:50:45,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633212781] [2023-08-27 14:50:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633212781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048968556] [2023-08-27 14:50:45,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:50:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:45,525 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 14:50:45,590 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 14:50:45,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:50:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:50:45,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:50:45,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:45,780 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 14:50:45,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:45,878 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 14:50:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048968556] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:45,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:50:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-08-27 14:50:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778223615] [2023-08-27 14:50:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:45,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:45,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:50:45,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:45,884 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 14:50:45,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:45,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:45,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:46,172 INFO L124 PetriNetUnfolderBase]: 1079/1685 cut-off events. [2023-08-27 14:50:46,172 INFO L125 PetriNetUnfolderBase]: For 4245/4245 co-relation queries the response was YES. [2023-08-27 14:50:46,176 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 14:50:46,186 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 70 selfloop transitions, 30 changer transitions 0/100 dead transitions. [2023-08-27 14:50:46,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 745 flow [2023-08-27 14:50:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:50:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:50:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 563 transitions. [2023-08-27 14:50:46,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058400718778078 [2023-08-27 14:50:46,189 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 563 transitions. [2023-08-27 14:50:46,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 563 transitions. [2023-08-27 14:50:46,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:46,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 563 transitions. [2023-08-27 14:50:46,191 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 14:50:46,194 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 14:50:46,194 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 14:50:46,195 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 308 flow. Second operand 7 states and 563 transitions. [2023-08-27 14:50:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 745 flow [2023-08-27 14:50:46,207 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 14:50:46,210 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 530 flow [2023-08-27 14:50:46,210 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 14:50:46,211 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2023-08-27 14:50:46,212 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 530 flow [2023-08-27 14:50:46,212 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 14:50:46,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:46,212 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 14:50:46,221 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 14:50:46,422 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 14:50:46,422 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 14:50:46,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -934670115, now seen corresponding path program 1 times [2023-08-27 14:50:46,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:46,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956663259] [2023-08-27 14:50:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:46,655 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 14:50:46,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956663259] [2023-08-27 14:50:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956663259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797335043] [2023-08-27 14:50:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:46,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:46,657 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 14:50:46,686 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 14:50:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:46,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:50:46,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:46,947 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 14:50:46,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:47,108 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 14:50:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797335043] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:47,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:50:47,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 5] total 11 [2023-08-27 14:50:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511471331] [2023-08-27 14:50:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:47,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:50:47,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:50:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 14:50:47,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:50:47,111 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 14:50:47,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:47,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:50:47,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:47,729 INFO L124 PetriNetUnfolderBase]: 1473/2371 cut-off events. [2023-08-27 14:50:47,729 INFO L125 PetriNetUnfolderBase]: For 10026/10026 co-relation queries the response was YES. [2023-08-27 14:50:47,735 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 14:50:47,751 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 154 selfloop transitions, 57 changer transitions 3/214 dead transitions. [2023-08-27 14:50:47,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 214 transitions, 1882 flow [2023-08-27 14:50:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:50:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:50:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1030 transitions. [2023-08-27 14:50:47,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983067247218191 [2023-08-27 14:50:47,754 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1030 transitions. [2023-08-27 14:50:47,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1030 transitions. [2023-08-27 14:50:47,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:47,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1030 transitions. [2023-08-27 14:50:47,757 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 14:50:47,760 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 14:50:47,760 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 14:50:47,760 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 530 flow. Second operand 13 states and 1030 transitions. [2023-08-27 14:50:47,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 214 transitions, 1882 flow [2023-08-27 14:50:47,791 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 14:50:47,794 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 1252 flow [2023-08-27 14:50:47,794 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 14:50:47,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2023-08-27 14:50:47,795 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 1252 flow [2023-08-27 14:50:47,795 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 14:50:47,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:47,796 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 14:50:47,807 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 14:50:48,001 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 14:50:48,002 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 14:50:48,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:48,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1858455883, now seen corresponding path program 2 times [2023-08-27 14:50:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:48,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493559939] [2023-08-27 14:50:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:48,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:48,238 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 14:50:48,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493559939] [2023-08-27 14:50:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493559939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:48,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:48,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:48,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753116780] [2023-08-27 14:50:48,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:48,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:48,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:48,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:48,241 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 14:50:48,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:48,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:48,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:48,606 INFO L124 PetriNetUnfolderBase]: 1571/2493 cut-off events. [2023-08-27 14:50:48,606 INFO L125 PetriNetUnfolderBase]: For 20586/20586 co-relation queries the response was YES. [2023-08-27 14:50:48,616 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 14:50:48,633 INFO L140 encePairwiseOnDemand]: 153/159 looper letters, 108 selfloop transitions, 26 changer transitions 3/137 dead transitions. [2023-08-27 14:50:48,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1659 flow [2023-08-27 14:50:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-08-27 14:50:48,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182389937106918 [2023-08-27 14:50:48,636 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-08-27 14:50:48,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-08-27 14:50:48,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:48,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-08-27 14:50:48,637 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 14:50:48,638 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 14:50:48,639 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 14:50:48,639 INFO L175 Difference]: Start difference. First operand has 81 places, 106 transitions, 1252 flow. Second operand 5 states and 412 transitions. [2023-08-27 14:50:48,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1659 flow [2023-08-27 14:50:48,721 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 14:50:48,724 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 1029 flow [2023-08-27 14:50:48,724 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 14:50:48,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-08-27 14:50:48,725 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 1029 flow [2023-08-27 14:50:48,725 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 14:50:48,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:48,725 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 14:50:48,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 14:50:48,726 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 14:50:48,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash -935682643, now seen corresponding path program 1 times [2023-08-27 14:50:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696122470] [2023-08-27 14:50:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:48,947 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 14:50:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:48,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696122470] [2023-08-27 14:50:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696122470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:48,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825735485] [2023-08-27 14:50:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:48,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:48,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 14:50:48,952 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 14:50:48,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:48,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 14:50:48,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:49,469 INFO L124 PetriNetUnfolderBase]: 2116/3375 cut-off events. [2023-08-27 14:50:49,470 INFO L125 PetriNetUnfolderBase]: For 24698/24698 co-relation queries the response was YES. [2023-08-27 14:50:49,481 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 14:50:49,504 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 171 selfloop transitions, 69 changer transitions 12/252 dead transitions. [2023-08-27 14:50:49,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 252 transitions, 3090 flow [2023-08-27 14:50:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:50:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:50:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 501 transitions. [2023-08-27 14:50:49,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2023-08-27 14:50:49,507 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 501 transitions. [2023-08-27 14:50:49,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 501 transitions. [2023-08-27 14:50:49,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:49,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 501 transitions. [2023-08-27 14:50:49,508 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 14:50:49,510 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 14:50:49,510 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 14:50:49,510 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 1029 flow. Second operand 6 states and 501 transitions. [2023-08-27 14:50:49,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 252 transitions, 3090 flow [2023-08-27 14:50:49,560 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 14:50:49,564 INFO L231 Difference]: Finished difference. Result has 85 places, 159 transitions, 2003 flow [2023-08-27 14:50:49,564 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 14:50:49,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-27 14:50:49,565 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 159 transitions, 2003 flow [2023-08-27 14:50:49,566 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 14:50:49,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:49,566 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 14:50:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 14:50:49,566 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 14:50:49,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1043019375, now seen corresponding path program 2 times [2023-08-27 14:50:49,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:49,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342340144] [2023-08-27 14:50:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:49,721 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 14:50:49,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:49,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342340144] [2023-08-27 14:50:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342340144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:49,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:49,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:49,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737359791] [2023-08-27 14:50:49,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:49,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:49,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:49,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 14:50:49,724 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 14:50:49,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:49,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 14:50:49,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:50,352 INFO L124 PetriNetUnfolderBase]: 2480/4074 cut-off events. [2023-08-27 14:50:50,353 INFO L125 PetriNetUnfolderBase]: For 35287/35287 co-relation queries the response was YES. [2023-08-27 14:50:50,368 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 14:50:50,391 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 142 selfloop transitions, 91 changer transitions 5/238 dead transitions. [2023-08-27 14:50:50,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 238 transitions, 3256 flow [2023-08-27 14:50:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-08-27 14:50:50,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-27 14:50:50,393 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-08-27 14:50:50,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-08-27 14:50:50,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:50,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-08-27 14:50:50,395 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 14:50:50,396 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 14:50:50,396 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 14:50:50,396 INFO L175 Difference]: Start difference. First operand has 85 places, 159 transitions, 2003 flow. Second operand 5 states and 421 transitions. [2023-08-27 14:50:50,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 238 transitions, 3256 flow [2023-08-27 14:50:50,506 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 14:50:50,510 INFO L231 Difference]: Finished difference. Result has 92 places, 173 transitions, 2547 flow [2023-08-27 14:50:50,510 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 14:50:50,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-27 14:50:50,511 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 173 transitions, 2547 flow [2023-08-27 14:50:50,511 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 14:50:50,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:50,511 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 14:50:50,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 14:50:50,511 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 14:50:50,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -408418431, now seen corresponding path program 3 times [2023-08-27 14:50:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:50,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12447042] [2023-08-27 14:50:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:50,731 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 14:50:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12447042] [2023-08-27 14:50:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12447042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624743436] [2023-08-27 14:50:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:50:50,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:50,736 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 14:50:50,762 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 14:50:50,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:50:50,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:50:50,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 14:50:50,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:50,991 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 14:50:50,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:51,197 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 14:50:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624743436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:51,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:51,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-08-27 14:50:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574694955] [2023-08-27 14:50:51,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:50:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:50:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 14:50:51,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 14:50:51,200 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 14:50:51,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:51,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 14:50:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:53,546 INFO L124 PetriNetUnfolderBase]: 4529/7336 cut-off events. [2023-08-27 14:50:53,547 INFO L125 PetriNetUnfolderBase]: For 81578/81578 co-relation queries the response was YES. [2023-08-27 14:50:53,576 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 14:50:53,615 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 335 selfloop transitions, 278 changer transitions 49/662 dead transitions. [2023-08-27 14:50:53,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 662 transitions, 8890 flow [2023-08-27 14:50:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 14:50:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 14:50:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2019 transitions. [2023-08-27 14:50:53,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488388969521045 [2023-08-27 14:50:53,621 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2019 transitions. [2023-08-27 14:50:53,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2019 transitions. [2023-08-27 14:50:53,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:53,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2019 transitions. [2023-08-27 14:50:53,626 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 14:50:53,631 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 14:50:53,632 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 14:50:53,632 INFO L175 Difference]: Start difference. First operand has 92 places, 173 transitions, 2547 flow. Second operand 26 states and 2019 transitions. [2023-08-27 14:50:53,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 662 transitions, 8890 flow [2023-08-27 14:50:53,950 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 14:50:53,960 INFO L231 Difference]: Finished difference. Result has 134 places, 372 transitions, 6623 flow [2023-08-27 14:50:53,960 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 14:50:53,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2023-08-27 14:50:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 372 transitions, 6623 flow [2023-08-27 14:50:53,961 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 14:50:53,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:53,962 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 14:50:53,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 14:50:54,167 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 14:50:54,168 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 14:50:54,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1832060313, now seen corresponding path program 4 times [2023-08-27 14:50:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511194288] [2023-08-27 14:50:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:54,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:54,424 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 14:50:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511194288] [2023-08-27 14:50:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511194288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:54,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318044917] [2023-08-27 14:50:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:54,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:54,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 159 [2023-08-27 14:50:54,427 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 14:50:54,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:54,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 159 [2023-08-27 14:50:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:55,780 INFO L124 PetriNetUnfolderBase]: 4259/6844 cut-off events. [2023-08-27 14:50:55,780 INFO L125 PetriNetUnfolderBase]: For 116032/116032 co-relation queries the response was YES. [2023-08-27 14:50:55,812 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 14:50:55,857 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 241 selfloop transitions, 170 changer transitions 7/418 dead transitions. [2023-08-27 14:50:55,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 418 transitions, 7793 flow [2023-08-27 14:50:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2023-08-27 14:50:55,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2023-08-27 14:50:55,859 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2023-08-27 14:50:55,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2023-08-27 14:50:55,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:55,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2023-08-27 14:50:55,861 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 14:50:55,862 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 14:50:55,862 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 14:50:55,862 INFO L175 Difference]: Start difference. First operand has 134 places, 372 transitions, 6623 flow. Second operand 5 states and 425 transitions. [2023-08-27 14:50:55,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 418 transitions, 7793 flow [2023-08-27 14:50:56,301 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 14:50:56,307 INFO L231 Difference]: Finished difference. Result has 137 places, 360 transitions, 6199 flow [2023-08-27 14:50:56,308 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 14:50:56,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-08-27 14:50:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 360 transitions, 6199 flow [2023-08-27 14:50:56,309 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 14:50:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:56,309 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 14:50:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 14:50:56,309 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 14:50:56,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1456693785, now seen corresponding path program 5 times [2023-08-27 14:50:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869518294] [2023-08-27 14:50:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:56,454 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 14:50:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869518294] [2023-08-27 14:50:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869518294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173010191] [2023-08-27 14:50:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:56,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:56,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:56,456 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 14:50:56,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:56,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:56,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:57,805 INFO L124 PetriNetUnfolderBase]: 4355/7033 cut-off events. [2023-08-27 14:50:57,805 INFO L125 PetriNetUnfolderBase]: For 112454/112454 co-relation queries the response was YES. [2023-08-27 14:50:57,830 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 14:50:57,869 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 402 selfloop transitions, 23 changer transitions 8/433 dead transitions. [2023-08-27 14:50:57,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 433 transitions, 7974 flow [2023-08-27 14:50:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:50:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:50:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 480 transitions. [2023-08-27 14:50:57,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2023-08-27 14:50:57,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 480 transitions. [2023-08-27 14:50:57,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 480 transitions. [2023-08-27 14:50:57,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:57,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 480 transitions. [2023-08-27 14:50:57,886 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 14:50:57,887 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 14:50:57,887 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 14:50:57,887 INFO L175 Difference]: Start difference. First operand has 137 places, 360 transitions, 6199 flow. Second operand 6 states and 480 transitions. [2023-08-27 14:50:57,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 433 transitions, 7974 flow [2023-08-27 14:50:58,337 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 14:50:58,343 INFO L231 Difference]: Finished difference. Result has 141 places, 367 transitions, 6051 flow [2023-08-27 14:50:58,344 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 14:50:58,344 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-08-27 14:50:58,344 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 367 transitions, 6051 flow [2023-08-27 14:50:58,345 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 14:50:58,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:58,345 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 14:50:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 14:50:58,345 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 14:50:58,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1121196403, now seen corresponding path program 6 times [2023-08-27 14:50:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:58,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317287402] [2023-08-27 14:50:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:58,469 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 14:50:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317287402] [2023-08-27 14:50:58,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317287402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:58,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:58,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:58,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096233850] [2023-08-27 14:50:58,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:58,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:58,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:58,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 159 [2023-08-27 14:50:58,471 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 14:50:58,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:58,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 159 [2023-08-27 14:50:58,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:59,554 INFO L124 PetriNetUnfolderBase]: 4191/6643 cut-off events. [2023-08-27 14:50:59,554 INFO L125 PetriNetUnfolderBase]: For 102699/102699 co-relation queries the response was YES. [2023-08-27 14:50:59,579 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 14:50:59,604 INFO L140 encePairwiseOnDemand]: 153/159 looper letters, 345 selfloop transitions, 17 changer transitions 7/369 dead transitions. [2023-08-27 14:50:59,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 369 transitions, 6708 flow [2023-08-27 14:50:59,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-27 14:50:59,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48553459119496856 [2023-08-27 14:50:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-27 14:50:59,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-27 14:50:59,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:59,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-27 14:50:59,607 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 14:50:59,608 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 14:50:59,609 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 14:50:59,609 INFO L175 Difference]: Start difference. First operand has 141 places, 367 transitions, 6051 flow. Second operand 5 states and 386 transitions. [2023-08-27 14:50:59,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 369 transitions, 6708 flow [2023-08-27 14:50:59,954 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 14:50:59,960 INFO L231 Difference]: Finished difference. Result has 141 places, 357 transitions, 5589 flow [2023-08-27 14:50:59,960 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 14:50:59,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-08-27 14:50:59,961 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 357 transitions, 5589 flow [2023-08-27 14:50:59,961 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 14:50:59,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:59,961 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 14:50:59,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 14:50:59,961 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 14:50:59,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1748652507, now seen corresponding path program 1 times [2023-08-27 14:50:59,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:59,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038589911] [2023-08-27 14:50:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:00,273 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 14:51:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038589911] [2023-08-27 14:51:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038589911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948016806] [2023-08-27 14:51:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:00,277 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 14:51:00,291 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 14:51:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:00,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:51:00,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:00,532 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 14:51:00,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:00,851 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 14:51:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948016806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:00,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-27 14:51:00,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38301827] [2023-08-27 14:51:00,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 14:51:00,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 14:51:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-27 14:51:00,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 14:51:00,857 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 14:51:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 14:51:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:51:02,593 INFO L124 PetriNetUnfolderBase]: 5117/8297 cut-off events. [2023-08-27 14:51:02,593 INFO L125 PetriNetUnfolderBase]: For 117145/117145 co-relation queries the response was YES. [2023-08-27 14:51:02,619 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 14:51:02,646 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 403 selfloop transitions, 203 changer transitions 6/612 dead transitions. [2023-08-27 14:51:02,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 612 transitions, 10613 flow [2023-08-27 14:51:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:51:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:51:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 691 transitions. [2023-08-27 14:51:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48287910552061497 [2023-08-27 14:51:02,649 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 691 transitions. [2023-08-27 14:51:02,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 691 transitions. [2023-08-27 14:51:02,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:51:02,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 691 transitions. [2023-08-27 14:51:02,651 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 14:51:02,658 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 14:51:02,658 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 14:51:02,658 INFO L175 Difference]: Start difference. First operand has 141 places, 357 transitions, 5589 flow. Second operand 9 states and 691 transitions. [2023-08-27 14:51:02,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 612 transitions, 10613 flow [2023-08-27 14:51:03,095 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 14:51:03,102 INFO L231 Difference]: Finished difference. Result has 145 places, 460 transitions, 8209 flow [2023-08-27 14:51:03,103 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 14:51:03,103 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2023-08-27 14:51:03,103 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 460 transitions, 8209 flow [2023-08-27 14:51:03,104 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 14:51:03,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:51:03,104 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 14:51:03,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 14:51:03,304 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 14:51:03,305 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 14:51:03,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:51:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash -150896881, now seen corresponding path program 2 times [2023-08-27 14:51:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:51:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111065666] [2023-08-27 14:51:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:51:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:03,586 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 14:51:03,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:03,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111065666] [2023-08-27 14:51:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111065666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:03,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841297996] [2023-08-27 14:51:03,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:51:03,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:03,588 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 14:51:03,590 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 14:51:03,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:51:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:51:03,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:51:03,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:03,749 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 14:51:03,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:04,203 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 14:51:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841297996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:04,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-27 14:51:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193123611] [2023-08-27 14:51:04,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 14:51:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 14:51:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-27 14:51:04,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 159 [2023-08-27 14:51:04,207 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 14:51:04,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:04,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 159 [2023-08-27 14:51:04,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:51:06,283 INFO L124 PetriNetUnfolderBase]: 5703/9231 cut-off events. [2023-08-27 14:51:06,283 INFO L125 PetriNetUnfolderBase]: For 151578/151578 co-relation queries the response was YES. [2023-08-27 14:51:06,329 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 14:51:06,365 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 428 selfloop transitions, 210 changer transitions 7/645 dead transitions. [2023-08-27 14:51:06,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 645 transitions, 12374 flow [2023-08-27 14:51:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 14:51:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 14:51:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 814 transitions. [2023-08-27 14:51:06,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-08-27 14:51:06,368 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 814 transitions. [2023-08-27 14:51:06,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 814 transitions. [2023-08-27 14:51:06,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:51:06,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 814 transitions. [2023-08-27 14:51:06,371 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 14:51:06,373 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 14:51:06,374 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 14:51:06,374 INFO L175 Difference]: Start difference. First operand has 145 places, 460 transitions, 8209 flow. Second operand 11 states and 814 transitions. [2023-08-27 14:51:06,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 645 transitions, 12374 flow [2023-08-27 14:51:07,182 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 14:51:07,193 INFO L231 Difference]: Finished difference. Result has 158 places, 544 transitions, 10075 flow [2023-08-27 14:51:07,194 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 14:51:07,194 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2023-08-27 14:51:07,194 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 544 transitions, 10075 flow [2023-08-27 14:51:07,195 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 14:51:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:51:07,195 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 14:51:07,203 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 14:51:07,403 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 14:51:07,404 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 14:51:07,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:51:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -527243925, now seen corresponding path program 1 times [2023-08-27 14:51:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:51:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72906871] [2023-08-27 14:51:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:51:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:07,661 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 14:51:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72906871] [2023-08-27 14:51:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72906871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535598433] [2023-08-27 14:51:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:07,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:07,665 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 14:51:07,687 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 14:51:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:07,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:51:07,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:08,017 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 14:51:08,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:08,368 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 14:51:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535598433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:08,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:08,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 19 [2023-08-27 14:51:08,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424784331] [2023-08-27 14:51:08,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:08,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 14:51:08,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 14:51:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:51:08,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:51:08,372 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 14:51:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:51:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:51:17,883 INFO L124 PetriNetUnfolderBase]: 17548/27650 cut-off events. [2023-08-27 14:51:17,883 INFO L125 PetriNetUnfolderBase]: For 600758/600758 co-relation queries the response was YES. [2023-08-27 14:51:18,029 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 14:51:18,153 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 879 selfloop transitions, 1892 changer transitions 0/2771 dead transitions. [2023-08-27 14:51:18,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 2771 transitions, 51757 flow [2023-08-27 14:51:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-27 14:51:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-27 14:51:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5485 transitions. [2023-08-27 14:51:18,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858712020550979 [2023-08-27 14:51:18,163 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5485 transitions. [2023-08-27 14:51:18,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5485 transitions. [2023-08-27 14:51:18,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:51:18,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5485 transitions. [2023-08-27 14:51:18,174 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 14:51:18,189 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 14:51:18,191 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 14:51:18,192 INFO L175 Difference]: Start difference. First operand has 158 places, 544 transitions, 10075 flow. Second operand 71 states and 5485 transitions. [2023-08-27 14:51:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 2771 transitions, 51757 flow [2023-08-27 14:51:21,233 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 14:51:21,269 INFO L231 Difference]: Finished difference. Result has 254 places, 2184 transitions, 46923 flow [2023-08-27 14:51:21,270 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 14:51:21,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-08-27 14:51:21,271 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 2184 transitions, 46923 flow [2023-08-27 14:51:21,272 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 14:51:21,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:51:21,272 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 14:51:21,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 14:51:21,484 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 14:51:21,484 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 14:51:21,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:51:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -651011781, now seen corresponding path program 2 times [2023-08-27 14:51:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:51:21,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818201202] [2023-08-27 14:51:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:51:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:21,691 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 14:51:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:21,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818201202] [2023-08-27 14:51:21,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818201202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:21,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086741811] [2023-08-27 14:51:21,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:51:21,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:21,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:21,693 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 14:51:21,695 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 14:51:21,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:51:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:51:21,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 14:51:21,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:21,857 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 14:51:21,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:22,079 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 14:51:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086741811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:22,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2023-08-27 14:51:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731567111] [2023-08-27 14:51:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:22,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 14:51:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 14:51:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:51:22,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:51:22,085 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 14:51:22,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:22,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:51:22,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:51:38,341 INFO L124 PetriNetUnfolderBase]: 20338/32203 cut-off events. [2023-08-27 14:51:38,341 INFO L125 PetriNetUnfolderBase]: For 829162/829162 co-relation queries the response was YES. [2023-08-27 14:51:38,649 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 14:51:38,794 INFO L140 encePairwiseOnDemand]: 148/159 looper letters, 1249 selfloop transitions, 2436 changer transitions 1/3686 dead transitions. [2023-08-27 14:51:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 3686 transitions, 82649 flow [2023-08-27 14:51:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-27 14:51:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-27 14:51:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4060 transitions. [2023-08-27 14:51:38,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48178473952770856 [2023-08-27 14:51:38,800 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4060 transitions. [2023-08-27 14:51:38,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4060 transitions. [2023-08-27 14:51:38,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:51:38,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4060 transitions. [2023-08-27 14:51:38,806 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 14:51:38,813 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 14:51:38,815 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 14:51:38,815 INFO L175 Difference]: Start difference. First operand has 254 places, 2184 transitions, 46923 flow. Second operand 53 states and 4060 transitions. [2023-08-27 14:51:38,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 3686 transitions, 82649 flow [2023-08-27 14:52:01,424 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 14:52:01,496 INFO L231 Difference]: Finished difference. Result has 343 places, 3190 transitions, 67618 flow [2023-08-27 14:52:01,498 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 14:52:01,498 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2023-08-27 14:52:01,499 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 3190 transitions, 67618 flow [2023-08-27 14:52:01,499 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 14:52:01,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:52:01,499 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 14:52:01,507 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 14:52:01,704 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 14:52:01,705 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 14:52:01,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:52:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash 353808511, now seen corresponding path program 3 times [2023-08-27 14:52:01,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:52:01,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907977627] [2023-08-27 14:52:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:52:01,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:52:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:52:01,902 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 14:52:01,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:52:01,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907977627] [2023-08-27 14:52:01,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907977627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:52:01,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451998378] [2023-08-27 14:52:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:52:01,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:52:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:52:01,905 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 14:52:01,937 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 14:52:02,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 14:52:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:52:02,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:52:02,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:52:02,281 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 14:52:02,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:52:02,622 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 14:52:02,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451998378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:52:02,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:52:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-27 14:52:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917335407] [2023-08-27 14:52:02,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:52:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 14:52:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:52:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 14:52:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:52:02,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:52:02,626 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 14:52:02,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:52:02,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:52:02,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:52:39,460 INFO L124 PetriNetUnfolderBase]: 30393/48708 cut-off events. [2023-08-27 14:52:39,460 INFO L125 PetriNetUnfolderBase]: For 1394454/1394454 co-relation queries the response was YES. [2023-08-27 14:52:40,431 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 14:52:40,672 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 1701 selfloop transitions, 4230 changer transitions 0/5931 dead transitions. [2023-08-27 14:52:40,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 5931 transitions, 137311 flow [2023-08-27 14:52:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-27 14:52:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-27 14:52:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5431 transitions. [2023-08-27 14:52:40,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879604672057502 [2023-08-27 14:52:40,687 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5431 transitions. [2023-08-27 14:52:40,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5431 transitions. [2023-08-27 14:52:40,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:52:40,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5431 transitions. [2023-08-27 14:52:40,702 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 14:52:40,719 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 14:52:40,721 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 14:52:40,722 INFO L175 Difference]: Start difference. First operand has 343 places, 3190 transitions, 67618 flow. Second operand 70 states and 5431 transitions. [2023-08-27 14:52:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 5931 transitions, 137311 flow [2023-08-27 14:53:42,254 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 14:53:42,370 INFO L231 Difference]: Finished difference. Result has 461 places, 5281 transitions, 128085 flow [2023-08-27 14:53:42,373 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 14:53:42,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2023-08-27 14:53:42,374 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 5281 transitions, 128085 flow [2023-08-27 14:53:42,374 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 14:53:42,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:53:42,374 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 14:53:42,382 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 14:53:42,579 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 14:53:42,579 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 14:53:42,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:53:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 165961575, now seen corresponding path program 4 times [2023-08-27 14:53:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:53:42,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455088374] [2023-08-27 14:53:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:53:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:53:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:53:42,711 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 14:53:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:53:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455088374] [2023-08-27 14:53:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455088374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:53:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703524787] [2023-08-27 14:53:42,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:53:42,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:53:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:53:42,712 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 14:53:42,715 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 14:53:42,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:53:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:53:42,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:53:42,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:53:42,839 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 14:53:42,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:53:43,053 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 14:53:43,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703524787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:53:43,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:53:43,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-27 14:53:43,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521051118] [2023-08-27 14:53:43,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:53:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 14:53:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:53:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 14:53:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:53:43,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:53:43,056 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 14:53:43,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:53:43,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:53:43,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:55:17,494 INFO L124 PetriNetUnfolderBase]: 44452/71994 cut-off events. [2023-08-27 14:55:17,494 INFO L125 PetriNetUnfolderBase]: For 2657556/2657556 co-relation queries the response was YES. [2023-08-27 14:55:19,609 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 14:55:19,994 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 2869 selfloop transitions, 6314 changer transitions 6/9189 dead transitions. [2023-08-27 14:55:19,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 9189 transitions, 244611 flow [2023-08-27 14:55:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-27 14:55:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-27 14:55:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5590 transitions. [2023-08-27 14:55:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816059274575687 [2023-08-27 14:55:19,999 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5590 transitions. [2023-08-27 14:55:19,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5590 transitions. [2023-08-27 14:55:20,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:55:20,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5590 transitions. [2023-08-27 14:55:20,007 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 14:55:20,018 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 14:55:20,020 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 14:55:20,020 INFO L175 Difference]: Start difference. First operand has 461 places, 5281 transitions, 128085 flow. Second operand 73 states and 5590 transitions. [2023-08-27 14:55:20,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 9189 transitions, 244611 flow [2023-08-27 14:59:15,370 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 14:59:15,545 INFO L231 Difference]: Finished difference. Result has 581 places, 8125 transitions, 217352 flow [2023-08-27 14:59:15,549 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 14:59:15,549 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 551 predicate places. [2023-08-27 14:59:15,549 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 8125 transitions, 217352 flow [2023-08-27 14:59:15,549 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 14:59:15,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:59:15,549 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 14:59:15,557 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 14:59:15,754 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 14:59:15,754 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 14:59:15,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:59:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash 981867539, now seen corresponding path program 5 times [2023-08-27 14:59:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:59:15,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258593514] [2023-08-27 14:59:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:59:15,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:59:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:59:15,933 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 14:59:15,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:59:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258593514] [2023-08-27 14:59:15,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258593514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:59:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567037459] [2023-08-27 14:59:15,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:59:15,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:59:15,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:59:15,934 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 14:59:15,937 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 14:59:16,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 14:59:16,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:59:16,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:59:16,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:59:16,188 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 14:59:16,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:59:16,440 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 14:59:16,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567037459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:59:16,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:59:16,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-27 14:59:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427024291] [2023-08-27 14:59:16,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:59:16,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 14:59:16,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:59:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 14:59:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:59:16,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-08-27 14:59:16,443 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 14:59:16,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:59:16,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-08-27 14:59:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 15:03:55,438 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 15:03:55,438 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 15:03:56,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:56,457 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 15:03:59,439 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2023-08-27 15:03:59,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-27 15:03:59,439 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-27 15:03:59,441 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-27 15:03:59,441 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-27 15:03:59,441 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-27 15:03:59,441 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 3, 2, 2, 1] [2023-08-27 15:03:59,443 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 15:03:59,443 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 15:03:59,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 03:03:59 BasicIcfg [2023-08-27 15:03:59,445 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 15:03:59,445 INFO L158 Benchmark]: Toolchain (without parser) took 799555.76ms. Allocated memory was 383.8MB in the beginning and 8.8GB in the end (delta: 8.4GB). Free memory was 339.0MB in the beginning and 4.2GB in the end (delta: -3.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-27 15:03:59,445 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 383.8MB. Free memory was 361.2MB in the beginning and 361.1MB in the end (delta: 86.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:03:59,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.07ms. Allocated memory is still 383.8MB. Free memory was 337.9MB in the beginning and 327.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 15:03:59,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.34ms. Allocated memory is still 383.8MB. Free memory was 327.4MB in the beginning and 325.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:03:59,446 INFO L158 Benchmark]: Boogie Preprocessor took 23.21ms. Allocated memory is still 383.8MB. Free memory was 325.3MB in the beginning and 324.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:03:59,446 INFO L158 Benchmark]: RCFGBuilder took 450.99ms. Allocated memory is still 383.8MB. Free memory was 324.3MB in the beginning and 305.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 15:03:59,446 INFO L158 Benchmark]: TraceAbstraction took 798779.61ms. Allocated memory was 383.8MB in the beginning and 8.8GB in the end (delta: 8.4GB). Free memory was 305.4MB in the beginning and 4.2GB in the end (delta: -3.9GB). Peak memory consumption was 5.0GB. Max. memory is 16.0GB. [2023-08-27 15:03:59,447 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 383.8MB. Free memory was 361.2MB in the beginning and 361.1MB in the end (delta: 86.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 264.07ms. Allocated memory is still 383.8MB. Free memory was 337.9MB in the beginning and 327.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.34ms. Allocated memory is still 383.8MB. Free memory was 327.4MB in the beginning and 325.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.21ms. Allocated memory is still 383.8MB. Free memory was 325.3MB in the beginning and 324.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 450.99ms. Allocated memory is still 383.8MB. Free memory was 324.3MB in the beginning and 305.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 798779.61ms. Allocated memory was 383.8MB in the beginning and 8.8GB in the end (delta: 8.4GB). Free memory was 305.4MB in the beginning and 4.2GB in the end (delta: -3.9GB). Peak memory consumption was 5.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 84 PlacesBefore, 30 PlacesAfterwards, 81 TransitionsBefore, 23 TransitionsAfterwards, 860 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 1272 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1089, independent: 1063, independent conditional: 0, independent unconditional: 1063, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 440, independent: 435, independent conditional: 0, independent unconditional: 435, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1089, independent: 628, independent conditional: 0, independent unconditional: 628, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 440, unknown conditional: 0, unknown unconditional: 440] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 111 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 798.6s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 784.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2977 SdHoareTripleChecker+Valid, 10.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2977 mSDsluCounter, 88 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 492 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12099 IncrementalHoareTripleChecker+Invalid, 12591 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 492 mSolverCounterUnsat, 46 mSDtfsCounter, 12099 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 807 GetRequests, 324 SyntacticMatches, 8 SemanticMatches, 475 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9426 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=217352occurred in iteration=18, InterpolantAutomatonStates: 382, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 588 NumberOfCodeBlocks, 588 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 755 ConstructedInterpolants, 0 QuantifiedInterpolants, 8017 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1616 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 39 InterpolantComputations, 11 PerfectInterpolantSequences, 14/59 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown