/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:40:15,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:40:15,228 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:40:15,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:40:15,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:40:15,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:40:15,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:40:15,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:40:15,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:40:15,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:40:15,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:40:15,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:40:15,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:40:15,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:40:15,255 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:40:15,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:40:15,255 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:40:15,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:40:15,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:40:15,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:40:15,257 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:40:15,257 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:40:15,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:40:15,258 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:40:15,258 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:40:15,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:40:15,259 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:40:15,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:40:15,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:40:15,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:40:15,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:40:15,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:40:15,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:40:15,261 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:40:15,261 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:40:15,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:40:15,261 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:40:15,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:40:15,262 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:40:15,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:40:15,262 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:40:15,262 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:40:15,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:40:15,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:40:15,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:40:15,522 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:40:15,522 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:40:15,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-04 08:40:16,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:40:16,831 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:40:16,832 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-04 08:40:16,839 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e754e071/550ec772eaa94137b858d547b3463dc1/FLAG0bae0d403 [2023-08-04 08:40:16,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e754e071/550ec772eaa94137b858d547b3463dc1 [2023-08-04 08:40:16,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:40:16,854 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:40:16,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:40:16,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:40:16,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:40:16,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:40:16" (1/1) ... [2023-08-04 08:40:16,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4530305c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:16, skipping insertion in model container [2023-08-04 08:40:16,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:40:16" (1/1) ... [2023-08-04 08:40:16,878 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:40:16,993 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c[2072,2085] [2023-08-04 08:40:16,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:40:17,002 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:40:17,019 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c[2072,2085] [2023-08-04 08:40:17,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:40:17,032 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:40:17,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17 WrapperNode [2023-08-04 08:40:17,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:40:17,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:40:17,034 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:40:17,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:40:17,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,062 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-04 08:40:17,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:40:17,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:40:17,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:40:17,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:40:17,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:40:17,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:40:17,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:40:17,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:40:17,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (1/1) ... [2023-08-04 08:40:17,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:40:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:17,118 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) [2023-08-04 08:40:17,132 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 [2023-08-04 08:40:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:40:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:40:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:40:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:40:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:40:17,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:40:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:40:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:40:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:40:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:40:17,165 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:40:17,267 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:40:17,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:40:17,497 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:40:17,504 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:40:17,504 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:40:17,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:40:17 BoogieIcfgContainer [2023-08-04 08:40:17,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:40:17,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:40:17,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:40:17,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:40:17,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:40:16" (1/3) ... [2023-08-04 08:40:17,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bccdde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:40:17, skipping insertion in model container [2023-08-04 08:40:17,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:40:17" (2/3) ... [2023-08-04 08:40:17,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bccdde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:40:17, skipping insertion in model container [2023-08-04 08:40:17,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:40:17" (3/3) ... [2023-08-04 08:40:17,513 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_mult-comm.wvr_bound2.c [2023-08-04 08:40:17,520 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:40:17,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:40:17,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:40:17,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:40:17,589 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:40:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,707 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 08:40:17,708 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:40:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:40:17,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:17,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:17,781 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 08:40:17,782 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:40:17,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:40:17,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-04 08:40:19,654 INFO L134 LiptonReduction]: Checked pairs total: 2818 [2023-08-04 08:40:19,654 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-04 08:40:19,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:40:19,675 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=true, 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;@77626d4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:19,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:40:19,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:19,679 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 08:40:19,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:40:19,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:19,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:40:19,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:19,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash 388098245, now seen corresponding path program 1 times [2023-08-04 08:40:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704539741] [2023-08-04 08:40:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704539741] [2023-08-04 08:40:19,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704539741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:19,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:40:19,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937966266] [2023-08-04 08:40:19,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:40:19,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-08-04 08:40:19,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:19,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:19,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-08-04 08:40:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:20,025 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-04 08:40:20,025 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 08:40:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1610 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-04 08:40:20,031 INFO L140 encePairwiseOnDemand]: 190/194 looper letters, 23 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-08-04 08:40:20,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-04 08:40:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-04 08:40:20,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506872852233677 [2023-08-04 08:40:20,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-04 08:40:20,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-04 08:40:20,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:20,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-04 08:40:20,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,069 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 295 transitions. [2023-08-04 08:40:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-04 08:40:20,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:20,074 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 80 flow [2023-08-04 08:40:20,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 08:40:20,079 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 08:40:20,079 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 80 flow [2023-08-04 08:40:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:20,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:20,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:40:20,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:20,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -881018540, now seen corresponding path program 1 times [2023-08-04 08:40:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:20,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364879051] [2023-08-04 08:40:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:20,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364879051] [2023-08-04 08:40:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364879051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589380794] [2023-08-04 08:40:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:20,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:20,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:20,203 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) [2023-08-04 08:40:20,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:40:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:20,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:20,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:20,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589380794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:20,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:20,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277837729] [2023-08-04 08:40:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:20,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-08-04 08:40:20,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:20,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-08-04 08:40:20,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:20,385 INFO L124 PetriNetUnfolderBase]: 257/409 cut-off events. [2023-08-04 08:40:20,386 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 08:40:20,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 409 events. 257/409 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1471 event pairs, 85 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 681. Up to 361 conditions per place. [2023-08-04 08:40:20,388 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 25 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 08:40:20,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 146 flow [2023-08-04 08:40:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 08:40:20,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085910652920962 [2023-08-04 08:40:20,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 08:40:20,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 08:40:20,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:20,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 08:40:20,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,394 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 80 flow. Second operand 3 states and 296 transitions. [2023-08-04 08:40:20,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 146 flow [2023-08-04 08:40:20,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:40:20,396 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 78 flow [2023-08-04 08:40:20,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-04 08:40:20,397 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-04 08:40:20,397 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 78 flow [2023-08-04 08:40:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:20,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:20,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:40:20,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:20,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:20,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 562410703, now seen corresponding path program 1 times [2023-08-04 08:40:20,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:20,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427279538] [2023-08-04 08:40:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:20,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427279538] [2023-08-04 08:40:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427279538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707978121] [2023-08-04 08:40:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:20,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:20,681 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) [2023-08-04 08:40:20,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:40:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:20,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:20,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:20,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707978121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:20,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:20,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981450615] [2023-08-04 08:40:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:20,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:20,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-08-04 08:40:20,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:20,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-08-04 08:40:20,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:20,828 INFO L124 PetriNetUnfolderBase]: 171/284 cut-off events. [2023-08-04 08:40:20,829 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 08:40:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 284 events. 171/284 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 905 event pairs, 52 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 201. Up to 193 conditions per place. [2023-08-04 08:40:20,832 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 08:40:20,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 160 flow [2023-08-04 08:40:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 08:40:20,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137457044673539 [2023-08-04 08:40:20,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 08:40:20,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 08:40:20,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:20,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 08:40:20,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,839 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 78 flow. Second operand 3 states and 299 transitions. [2023-08-04 08:40:20,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 160 flow [2023-08-04 08:40:20,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:40:20,841 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 86 flow [2023-08-04 08:40:20,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-04 08:40:20,843 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-04 08:40:20,843 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 86 flow [2023-08-04 08:40:20,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:20,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:20,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:40:21,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:21,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -181866037, now seen corresponding path program 1 times [2023-08-04 08:40:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607988616] [2023-08-04 08:40:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:21,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607988616] [2023-08-04 08:40:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607988616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169004020] [2023-08-04 08:40:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:21,200 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) [2023-08-04 08:40:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:40:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:21,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:21,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:21,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:21,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169004020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:21,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:40:21,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497293427] [2023-08-04 08:40:21,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:21,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:21,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-08-04 08:40:21,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:21,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-08-04 08:40:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:21,334 INFO L124 PetriNetUnfolderBase]: 162/271 cut-off events. [2023-08-04 08:40:21,334 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 08:40:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 271 events. 162/271 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 842 event pairs, 69 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 243. Up to 228 conditions per place. [2023-08-04 08:40:21,335 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 25 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2023-08-04 08:40:21,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 154 flow [2023-08-04 08:40:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 08:40:21,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085910652920962 [2023-08-04 08:40:21,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 08:40:21,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 08:40:21,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:21,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 08:40:21,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,340 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 86 flow. Second operand 3 states and 296 transitions. [2023-08-04 08:40:21,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 154 flow [2023-08-04 08:40:21,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:21,341 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 88 flow [2023-08-04 08:40:21,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 08:40:21,342 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 08:40:21,342 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 88 flow [2023-08-04 08:40:21,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:21,343 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, 1, 1] [2023-08-04 08:40:21,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:21,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:21,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1336199735, now seen corresponding path program 1 times [2023-08-04 08:40:21,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:21,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538071443] [2023-08-04 08:40:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:21,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:21,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538071443] [2023-08-04 08:40:21,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538071443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:21,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168565379] [2023-08-04 08:40:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:21,614 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) [2023-08-04 08:40:21,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:40:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:21,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:21,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:21,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168565379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:21,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:21,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:40:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505279784] [2023-08-04 08:40:21,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:21,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-08-04 08:40:21,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:21,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-08-04 08:40:21,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:21,746 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 08:40:21,746 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:40:21,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 19 events. 8/19 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 1 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 40. Up to 13 conditions per place. [2023-08-04 08:40:21,746 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 08:40:21,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 42 flow [2023-08-04 08:40:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2023-08-04 08:40:21,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46649484536082475 [2023-08-04 08:40:21,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2023-08-04 08:40:21,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2023-08-04 08:40:21,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:21,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2023-08-04 08:40:21,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,751 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 88 flow. Second operand 4 states and 362 transitions. [2023-08-04 08:40:21,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 42 flow [2023-08-04 08:40:21,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:21,752 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 08:40:21,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 08:40:21,753 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -13 predicate places. [2023-08-04 08:40:21,753 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 08:40:21,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:21,756 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:40:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:21,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:21,963 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:40:21,965 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:40:21,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:21,988 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 08:40:21,988 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:40:21,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:40:21,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:21,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:21,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:21,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:21,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:21,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 08:40:22,007 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 08:40:22,007 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:40:22,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:40:22,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-04 08:40:23,784 INFO L134 LiptonReduction]: Checked pairs total: 2930 [2023-08-04 08:40:23,784 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-04 08:40:23,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:40:23,786 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=true, 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;@77626d4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:23,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:40:23,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:23,790 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 08:40:23,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:40:23,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:23,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:40:23,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:40:23,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1804383918, now seen corresponding path program 1 times [2023-08-04 08:40:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:23,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134961130] [2023-08-04 08:40:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:23,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:40:23,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:40:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:40:23,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:40:23,859 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:40:23,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:40:23,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:40:23,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:40:23,860 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:40:23,860 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:40:23,861 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:40:23,861 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:40:23,884 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:40:23,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:23,964 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 08:40:23,965 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:40:23,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 822 events. 133/822 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4201 event pairs, 1 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-04 08:40:23,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:23,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:23,975 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:40:23,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:23,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:23,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 08:40:24,041 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 08:40:24,042 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:40:24,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 822 events. 133/822 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4201 event pairs, 1 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-04 08:40:24,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 08:40:26,045 INFO L134 LiptonReduction]: Checked pairs total: 8863 [2023-08-04 08:40:26,046 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 08:40:26,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:40:26,048 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=true, 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;@77626d4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:40:26,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:40:26,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:40:26,049 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 08:40:26,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:40:26,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:26,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:40:26,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:26,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 719052543, now seen corresponding path program 1 times [2023-08-04 08:40:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310611020] [2023-08-04 08:40:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:26,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:26,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310611020] [2023-08-04 08:40:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310611020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:26,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:26,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:40:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356513928] [2023-08-04 08:40:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:26,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:40:26,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 08:40:26,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:26,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 08:40:26,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:26,757 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-04 08:40:26,757 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-04 08:40:26,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 47396 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-04 08:40:26,829 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 35 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 08:40:26,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-04 08:40:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 08:40:26,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2023-08-04 08:40:26,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 08:40:26,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 08:40:26,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:26,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 08:40:26,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,834 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 360 transitions. [2023-08-04 08:40:26,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-04 08:40:26,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:26,837 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 08:40:26,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-04 08:40:26,838 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:40:26,839 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 08:40:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:26,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:26,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:40:26,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:26,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2047641304, now seen corresponding path program 1 times [2023-08-04 08:40:26,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:26,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683961293] [2023-08-04 08:40:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:26,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:40:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683961293] [2023-08-04 08:40:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683961293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35508712] [2023-08-04 08:40:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:26,874 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) [2023-08-04 08:40:26,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:40:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:26,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:26,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:26,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35508712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761985603] [2023-08-04 08:40:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:26,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:26,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 08:40:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:26,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:26,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 08:40:26,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:27,620 INFO L124 PetriNetUnfolderBase]: 8488/11014 cut-off events. [2023-08-04 08:40:27,620 INFO L125 PetriNetUnfolderBase]: For 859/859 co-relation queries the response was YES. [2023-08-04 08:40:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22260 conditions, 11014 events. 8488/11014 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 49183 event pairs, 3438 based on Foata normal form. 0/6262 useless extension candidates. Maximal degree in co-relation 22230. Up to 10389 conditions per place. [2023-08-04 08:40:27,679 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 08:40:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 234 flow [2023-08-04 08:40:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 08:40:27,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2023-08-04 08:40:27,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 08:40:27,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 08:40:27,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:27,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 08:40:27,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:27,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:27,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:27,687 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 363 transitions. [2023-08-04 08:40:27,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 234 flow [2023-08-04 08:40:27,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:40:27,693 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 08:40:27,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-04 08:40:27,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 08:40:27,695 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 08:40:27,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:27,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:27,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:27,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:27,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:27,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1771257961, now seen corresponding path program 1 times [2023-08-04 08:40:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257103543] [2023-08-04 08:40:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:40:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257103543] [2023-08-04 08:40:27,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257103543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979902284] [2023-08-04 08:40:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:27,956 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) [2023-08-04 08:40:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:40:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:28,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:28,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:28,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979902284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:28,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:28,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:40:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143439265] [2023-08-04 08:40:28,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:28,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:28,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 08:40:28,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:28,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 08:40:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:28,572 INFO L124 PetriNetUnfolderBase]: 7283/9572 cut-off events. [2023-08-04 08:40:28,572 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-04 08:40:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19645 conditions, 9572 events. 7283/9572 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 42979 event pairs, 2490 based on Foata normal form. 0/5673 useless extension candidates. Maximal degree in co-relation 6727. Up to 6828 conditions per place. [2023-08-04 08:40:28,612 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 08:40:28,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 274 flow [2023-08-04 08:40:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 08:40:28,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-04 08:40:28,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 08:40:28,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 08:40:28,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:28,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 08:40:28,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,617 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 369 transitions. [2023-08-04 08:40:28,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 274 flow [2023-08-04 08:40:28,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:28,619 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 08:40:28,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 08:40:28,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 08:40:28,620 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 08:40:28,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:28,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:28,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:28,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:28,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:28,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:28,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1143331105, now seen corresponding path program 1 times [2023-08-04 08:40:28,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:28,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243459302] [2023-08-04 08:40:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:28,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:40:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243459302] [2023-08-04 08:40:28,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243459302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:28,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142155385] [2023-08-04 08:40:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:28,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:28,873 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) [2023-08-04 08:40:28,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:40:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:28,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:40:28,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:28,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:40:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142155385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:28,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:40:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:40:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425075144] [2023-08-04 08:40:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:28,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 08:40:28,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:28,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:28,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 08:40:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:29,511 INFO L124 PetriNetUnfolderBase]: 7160/9501 cut-off events. [2023-08-04 08:40:29,511 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 08:40:29,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20205 conditions, 9501 events. 7160/9501 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 42876 event pairs, 2789 based on Foata normal form. 0/5933 useless extension candidates. Maximal degree in co-relation 7255. Up to 7262 conditions per place. [2023-08-04 08:40:29,552 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 08:40:29,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 286 flow [2023-08-04 08:40:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 08:40:29,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-04 08:40:29,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 08:40:29,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 08:40:29,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:29,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 08:40:29,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:29,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:29,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:29,556 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 369 transitions. [2023-08-04 08:40:29,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 286 flow [2023-08-04 08:40:29,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:29,561 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 08:40:29,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 08:40:29,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 08:40:29,561 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 08:40:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:29,562 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, 1, 1, 1, 1] [2023-08-04 08:40:29,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:29,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:29,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:29,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1584822774, now seen corresponding path program 1 times [2023-08-04 08:40:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384398829] [2023-08-04 08:40:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384398829] [2023-08-04 08:40:29,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384398829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087932234] [2023-08-04 08:40:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:29,808 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) [2023-08-04 08:40:29,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:40:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:29,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:29,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:29,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:40:29,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087932234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:29,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:29,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:40:29,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868842871] [2023-08-04 08:40:29,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:29,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:29,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:29,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 08:40:29,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:29,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:29,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 08:40:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:30,406 INFO L124 PetriNetUnfolderBase]: 6453/8554 cut-off events. [2023-08-04 08:40:30,406 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-04 08:40:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18389 conditions, 8554 events. 6453/8554 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 38171 event pairs, 1919 based on Foata normal form. 3/5405 useless extension candidates. Maximal degree in co-relation 12362. Up to 8125 conditions per place. [2023-08-04 08:40:30,437 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 08:40:30,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 264 flow [2023-08-04 08:40:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2023-08-04 08:40:30,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49893162393162394 [2023-08-04 08:40:30,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2023-08-04 08:40:30,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2023-08-04 08:40:30,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:30,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2023-08-04 08:40:30,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:30,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:30,442 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:30,442 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 467 transitions. [2023-08-04 08:40:30,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 264 flow [2023-08-04 08:40:30,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:30,460 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 08:40:30,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-04 08:40:30,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 08:40:30,461 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 08:40:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:30,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:30,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:30,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:30,669 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,SelfDestructingSolverStorable10 [2023-08-04 08:40:30,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:30,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1735713715, now seen corresponding path program 1 times [2023-08-04 08:40:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278520273] [2023-08-04 08:40:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:40:30,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278520273] [2023-08-04 08:40:30,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278520273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855061924] [2023-08-04 08:40:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:30,732 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) [2023-08-04 08:40:30,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:40:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:30,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:30,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:40:30,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:40:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855061924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:30,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:40:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061047323] [2023-08-04 08:40:30,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:30,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 08:40:30,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:30,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:30,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 08:40:30,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:31,301 INFO L124 PetriNetUnfolderBase]: 6114/8098 cut-off events. [2023-08-04 08:40:31,302 INFO L125 PetriNetUnfolderBase]: For 795/795 co-relation queries the response was YES. [2023-08-04 08:40:31,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 8098 events. 6114/8098 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 36506 event pairs, 1699 based on Foata normal form. 27/5129 useless extension candidates. Maximal degree in co-relation 11398. Up to 6552 conditions per place. [2023-08-04 08:40:31,323 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 49 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 08:40:31,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 08:40:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 08:40:31,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074786324786325 [2023-08-04 08:40:31,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 08:40:31,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 08:40:31,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:31,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 08:40:31,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:31,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:31,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:31,328 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 475 transitions. [2023-08-04 08:40:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 08:40:31,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:40:31,339 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 08:40:31,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-04 08:40:31,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 08:40:31,340 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 08:40:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:31,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:31,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:31,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:31,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:31,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 239698321, now seen corresponding path program 1 times [2023-08-04 08:40:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503719134] [2023-08-04 08:40:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503719134] [2023-08-04 08:40:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503719134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220432331] [2023-08-04 08:40:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:31,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:31,592 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) [2023-08-04 08:40:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:40:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:31,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:31,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:31,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220432331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:31,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:31,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:40:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756341442] [2023-08-04 08:40:31,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:31,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:31,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:31,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 08:40:31,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:31,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:31,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 08:40:31,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:32,015 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-04 08:40:32,015 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2023-08-04 08:40:32,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 5529 events. 4136/5529 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22766 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10556. Up to 2080 conditions per place. [2023-08-04 08:40:32,043 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 08:40:32,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 346 flow [2023-08-04 08:40:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 08:40:32,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-04 08:40:32,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:32,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,048 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 481 transitions. [2023-08-04 08:40:32,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 346 flow [2023-08-04 08:40:32,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:40:32,056 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 08:40:32,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-04 08:40:32,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 08:40:32,057 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 08:40:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:32,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:32,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:32,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:40:32,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:32,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2111468024, now seen corresponding path program 1 times [2023-08-04 08:40:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:32,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342594531] [2023-08-04 08:40:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:32,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342594531] [2023-08-04 08:40:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342594531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951900665] [2023-08-04 08:40:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:32,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:32,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:40:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:32,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:40:32,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:32,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:32,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951900665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:32,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:32,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:40:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252248863] [2023-08-04 08:40:32,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:32,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 08:40:32,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 08:40:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:32,716 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-04 08:40:32,716 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-04 08:40:32,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22640 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11102. Up to 4661 conditions per place. [2023-08-04 08:40:32,730 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-04 08:40:32,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 358 flow [2023-08-04 08:40:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 08:40:32,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-04 08:40:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:32,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 08:40:32,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,746 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 481 transitions. [2023-08-04 08:40:32,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 358 flow [2023-08-04 08:40:32,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:32,760 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 08:40:32,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-04 08:40:32,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 08:40:32,762 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 08:40:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:32,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:32,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:32,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:40:32,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:32,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash -57971831, now seen corresponding path program 1 times [2023-08-04 08:40:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826789997] [2023-08-04 08:40:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:40:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826789997] [2023-08-04 08:40:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826789997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:33,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:33,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 08:40:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749888179] [2023-08-04 08:40:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:40:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:40:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:40:33,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 08:40:33,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:33,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:33,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 08:40:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:33,698 INFO L124 PetriNetUnfolderBase]: 4907/6387 cut-off events. [2023-08-04 08:40:33,698 INFO L125 PetriNetUnfolderBase]: For 3431/3431 co-relation queries the response was YES. [2023-08-04 08:40:33,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14814 conditions, 6387 events. 4907/6387 cut-off events. For 3431/3431 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25232 event pairs, 500 based on Foata normal form. 1/3949 useless extension candidates. Maximal degree in co-relation 14528. Up to 5460 conditions per place. [2023-08-04 08:40:33,742 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 65 selfloop transitions, 5 changer transitions 1/79 dead transitions. [2023-08-04 08:40:33,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 490 flow [2023-08-04 08:40:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:40:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:40:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 08:40:33,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484330484330484 [2023-08-04 08:40:33,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 08:40:33,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 08:40:33,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:33,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 08:40:33,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:33,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:33,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:33,747 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 190 flow. Second operand 3 states and 385 transitions. [2023-08-04 08:40:33,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 490 flow [2023-08-04 08:40:33,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 474 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:40:33,756 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 215 flow [2023-08-04 08:40:33,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-04 08:40:33,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 08:40:33,758 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 215 flow [2023-08-04 08:40:33,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:33,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:33,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:33,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 08:40:33,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:33,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash -476074448, now seen corresponding path program 1 times [2023-08-04 08:40:33,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:33,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519779260] [2023-08-04 08:40:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:40:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:33,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519779260] [2023-08-04 08:40:33,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519779260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:33,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:33,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:40:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388035947] [2023-08-04 08:40:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:34,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 08:40:34,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:34,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:34,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 08:40:34,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:34,805 INFO L124 PetriNetUnfolderBase]: 8416/11703 cut-off events. [2023-08-04 08:40:34,805 INFO L125 PetriNetUnfolderBase]: For 8185/8185 co-relation queries the response was YES. [2023-08-04 08:40:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31426 conditions, 11703 events. 8416/11703 cut-off events. For 8185/8185 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 62210 event pairs, 1988 based on Foata normal form. 382/12085 useless extension candidates. Maximal degree in co-relation 30738. Up to 4967 conditions per place. [2023-08-04 08:40:34,882 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 133 selfloop transitions, 5 changer transitions 0/144 dead transitions. [2023-08-04 08:40:34,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 144 transitions, 944 flow [2023-08-04 08:40:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:40:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:40:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-04 08:40:34,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-04 08:40:34,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-04 08:40:34,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-04 08:40:34,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:34,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-04 08:40:34,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:34,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:34,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:34,888 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 215 flow. Second operand 5 states and 627 transitions. [2023-08-04 08:40:34,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 144 transitions, 944 flow [2023-08-04 08:40:34,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 144 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:34,917 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 249 flow [2023-08-04 08:40:34,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-08-04 08:40:34,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-08-04 08:40:34,917 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 249 flow [2023-08-04 08:40:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:34,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:34,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:40:34,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:34,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -322622264, now seen corresponding path program 1 times [2023-08-04 08:40:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749609751] [2023-08-04 08:40:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749609751] [2023-08-04 08:40:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749609751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429987793] [2023-08-04 08:40:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:35,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:35,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:40:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:35,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:35,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:35,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429987793] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:35,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 08:40:35,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 08:40:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099665634] [2023-08-04 08:40:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:40:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:40:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:40:35,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 08:40:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:35,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 08:40:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:36,361 INFO L124 PetriNetUnfolderBase]: 10324/14244 cut-off events. [2023-08-04 08:40:36,361 INFO L125 PetriNetUnfolderBase]: For 16083/16672 co-relation queries the response was YES. [2023-08-04 08:40:36,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42700 conditions, 14244 events. 10324/14244 cut-off events. For 16083/16672 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75892 event pairs, 3406 based on Foata normal form. 387/14530 useless extension candidates. Maximal degree in co-relation 41822. Up to 7214 conditions per place. [2023-08-04 08:40:36,507 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 101 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-04 08:40:36,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 782 flow [2023-08-04 08:40:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 08:40:36,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-04 08:40:36,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 08:40:36,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 08:40:36,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:36,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 08:40:36,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:36,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:36,512 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:36,512 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 249 flow. Second operand 4 states and 508 transitions. [2023-08-04 08:40:36,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 782 flow [2023-08-04 08:40:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 115 transitions, 768 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:36,554 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 294 flow [2023-08-04 08:40:36,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2023-08-04 08:40:36,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2023-08-04 08:40:36,555 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 294 flow [2023-08-04 08:40:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:36,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:36,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:36,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 08:40:36,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:36,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 164166135, now seen corresponding path program 1 times [2023-08-04 08:40:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792434783] [2023-08-04 08:40:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:36,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:36,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792434783] [2023-08-04 08:40:36,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792434783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464927930] [2023-08-04 08:40:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:36,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:36,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:36,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:40:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:36,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:36,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:36,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:37,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464927930] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:37,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 08:40:37,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 08:40:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495405276] [2023-08-04 08:40:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:40:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:40:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:40:37,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 08:40:37,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:37,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:37,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 08:40:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:38,421 INFO L124 PetriNetUnfolderBase]: 12669/17686 cut-off events. [2023-08-04 08:40:38,422 INFO L125 PetriNetUnfolderBase]: For 35334/38448 co-relation queries the response was YES. [2023-08-04 08:40:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56209 conditions, 17686 events. 12669/17686 cut-off events. For 35334/38448 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 99621 event pairs, 2903 based on Foata normal form. 2578/20016 useless extension candidates. Maximal degree in co-relation 55006. Up to 9640 conditions per place. [2023-08-04 08:40:38,498 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 100 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-04 08:40:38,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 820 flow [2023-08-04 08:40:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-04 08:40:38,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-04 08:40:38,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-04 08:40:38,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-04 08:40:38,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:38,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-04 08:40:38,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:38,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:38,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:38,502 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 294 flow. Second operand 4 states and 498 transitions. [2023-08-04 08:40:38,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 820 flow [2023-08-04 08:40:38,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 814 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:38,559 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 338 flow [2023-08-04 08:40:38,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2023-08-04 08:40:38,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2023-08-04 08:40:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 338 flow [2023-08-04 08:40:38,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:38,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:38,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:38,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:40:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:40:38,765 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:38,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash 762109740, now seen corresponding path program 2 times [2023-08-04 08:40:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43435690] [2023-08-04 08:40:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:38,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43435690] [2023-08-04 08:40:38,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43435690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:38,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541407879] [2023-08-04 08:40:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:40:38,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:38,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:38,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:40:38,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:40:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:40:38,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:38,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:38,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:39,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541407879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:39,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:39,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-04 08:40:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408012689] [2023-08-04 08:40:39,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:39,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 08:40:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 08:40:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 08:40:39,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:40:39,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:39,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:39,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:40:39,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:41,438 INFO L124 PetriNetUnfolderBase]: 19537/27731 cut-off events. [2023-08-04 08:40:41,438 INFO L125 PetriNetUnfolderBase]: For 65693/67800 co-relation queries the response was YES. [2023-08-04 08:40:41,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97122 conditions, 27731 events. 19537/27731 cut-off events. For 65693/67800 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 169004 event pairs, 6795 based on Foata normal form. 1674/29161 useless extension candidates. Maximal degree in co-relation 95199. Up to 9905 conditions per place. [2023-08-04 08:40:41,585 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 210 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2023-08-04 08:40:41,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 236 transitions, 1793 flow [2023-08-04 08:40:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:40:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:40:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 883 transitions. [2023-08-04 08:40:41,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539072039072039 [2023-08-04 08:40:41,588 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 883 transitions. [2023-08-04 08:40:41,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 883 transitions. [2023-08-04 08:40:41,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:41,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 883 transitions. [2023-08-04 08:40:41,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,592 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,592 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 338 flow. Second operand 7 states and 883 transitions. [2023-08-04 08:40:41,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 236 transitions, 1793 flow [2023-08-04 08:40:41,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 236 transitions, 1781 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:41,780 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 502 flow [2023-08-04 08:40:41,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2023-08-04 08:40:41,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2023-08-04 08:40:41,781 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 502 flow [2023-08-04 08:40:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:41,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:41,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:41,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:41,983 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:41,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash -912632268, now seen corresponding path program 1 times [2023-08-04 08:40:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317415687] [2023-08-04 08:40:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317415687] [2023-08-04 08:40:42,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317415687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39105224] [2023-08-04 08:40:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:42,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:42,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:42,073 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:42,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:40:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:42,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:42,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:42,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39105224] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:42,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 08:40:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 08:40:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034779106] [2023-08-04 08:40:42,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:42,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:40:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:40:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:40:42,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 08:40:42,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:42,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:42,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 08:40:42,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:44,486 INFO L124 PetriNetUnfolderBase]: 18581/26200 cut-off events. [2023-08-04 08:40:44,487 INFO L125 PetriNetUnfolderBase]: For 85443/89834 co-relation queries the response was YES. [2023-08-04 08:40:44,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99473 conditions, 26200 events. 18581/26200 cut-off events. For 85443/89834 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 158586 event pairs, 6173 based on Foata normal form. 3062/28901 useless extension candidates. Maximal degree in co-relation 97508. Up to 15530 conditions per place. [2023-08-04 08:40:44,804 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2023-08-04 08:40:44,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1106 flow [2023-08-04 08:40:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:40:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:40:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 08:40:44,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-04 08:40:44,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 08:40:44,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 08:40:44,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:44,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 08:40:44,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:44,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:44,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:44,810 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 502 flow. Second operand 4 states and 508 transitions. [2023-08-04 08:40:44,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1106 flow [2023-08-04 08:40:44,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 1100 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:44,954 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 558 flow [2023-08-04 08:40:44,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2023-08-04 08:40:44,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2023-08-04 08:40:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 558 flow [2023-08-04 08:40:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:44,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:44,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:40:45,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:45,161 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:45,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash 721845597, now seen corresponding path program 2 times [2023-08-04 08:40:45,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:45,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951414982] [2023-08-04 08:40:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:45,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:45,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:45,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951414982] [2023-08-04 08:40:45,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951414982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131836558] [2023-08-04 08:40:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:40:45,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:45,277 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:45,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:40:45,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:40:45,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:40:45,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:45,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:45,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:40:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131836558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:45,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:45,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 08:40:45,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569858658] [2023-08-04 08:40:45,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:45,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:40:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:40:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:40:45,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:40:45,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 558 flow. Second operand has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:45,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:45,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:40:45,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:49,565 INFO L124 PetriNetUnfolderBase]: 34592/48855 cut-off events. [2023-08-04 08:40:49,566 INFO L125 PetriNetUnfolderBase]: For 246673/268688 co-relation queries the response was YES. [2023-08-04 08:40:49,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193465 conditions, 48855 events. 34592/48855 cut-off events. For 246673/268688 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 317935 event pairs, 7407 based on Foata normal form. 6739/54725 useless extension candidates. Maximal degree in co-relation 189578. Up to 20102 conditions per place. [2023-08-04 08:40:49,884 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 174 selfloop transitions, 15 changer transitions 0/200 dead transitions. [2023-08-04 08:40:49,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 200 transitions, 1936 flow [2023-08-04 08:40:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:40:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:40:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-04 08:40:49,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523931623931624 [2023-08-04 08:40:49,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-04 08:40:49,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-04 08:40:49,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:49,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-04 08:40:49,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:49,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:49,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:49,889 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 558 flow. Second operand 5 states and 613 transitions. [2023-08-04 08:40:49,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 200 transitions, 1936 flow [2023-08-04 08:40:50,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 200 transitions, 1882 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-04 08:40:50,315 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 668 flow [2023-08-04 08:40:50,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=668, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-04 08:40:50,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2023-08-04 08:40:50,316 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 668 flow [2023-08-04 08:40:50,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:50,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:50,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:50,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 08:40:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:50,522 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:50,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash -570659918, now seen corresponding path program 1 times [2023-08-04 08:40:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:50,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025208795] [2023-08-04 08:40:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:40:50,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:50,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025208795] [2023-08-04 08:40:50,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025208795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:40:50,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:40:50,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:40:50,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923319016] [2023-08-04 08:40:50,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:50,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:40:50,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:40:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:40:50,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 08:40:50,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:50,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:50,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 08:40:50,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:40:56,083 INFO L124 PetriNetUnfolderBase]: 40899/59182 cut-off events. [2023-08-04 08:40:56,083 INFO L125 PetriNetUnfolderBase]: For 313444/340202 co-relation queries the response was YES. [2023-08-04 08:40:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248594 conditions, 59182 events. 40899/59182 cut-off events. For 313444/340202 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 417016 event pairs, 10739 based on Foata normal form. 9389/67490 useless extension candidates. Maximal degree in co-relation 243112. Up to 29921 conditions per place. [2023-08-04 08:40:56,603 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 189 selfloop transitions, 11 changer transitions 0/211 dead transitions. [2023-08-04 08:40:56,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 211 transitions, 2091 flow [2023-08-04 08:40:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:40:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:40:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-08-04 08:40:56,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264957264957265 [2023-08-04 08:40:56,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-08-04 08:40:56,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-08-04 08:40:56,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:40:56,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-08-04 08:40:56,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:56,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:56,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:56,609 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 668 flow. Second operand 5 states and 616 transitions. [2023-08-04 08:40:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 211 transitions, 2091 flow [2023-08-04 08:40:57,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 211 transitions, 2091 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:40:57,602 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 740 flow [2023-08-04 08:40:57,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=740, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2023-08-04 08:40:57,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2023-08-04 08:40:57,603 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 740 flow [2023-08-04 08:40:57,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:57,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:57,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:40:57,603 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:57,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1512808990, now seen corresponding path program 2 times [2023-08-04 08:40:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785633700] [2023-08-04 08:40:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:57,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:57,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785633700] [2023-08-04 08:40:57,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785633700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:57,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155895248] [2023-08-04 08:40:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:40:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:57,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:40:57,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:40:57,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:40:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:40:57,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:40:57,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:57,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:40:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155895248] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:57,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 08:40:57,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 08:40:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667201818] [2023-08-04 08:40:57,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:40:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:40:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:40:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:40:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 08:40:57,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 740 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:57,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:57,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 08:40:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:03,028 INFO L124 PetriNetUnfolderBase]: 39118/56758 cut-off events. [2023-08-04 08:41:03,028 INFO L125 PetriNetUnfolderBase]: For 323214/351122 co-relation queries the response was YES. [2023-08-04 08:41:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256918 conditions, 56758 events. 39118/56758 cut-off events. For 323214/351122 co-relation queries the response was YES. Maximal size of possible extension queue 2001. Compared 401437 event pairs, 11531 based on Foata normal form. 8739/64063 useless extension candidates. Maximal degree in co-relation 251270. Up to 31740 conditions per place. [2023-08-04 08:41:03,490 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 131 selfloop transitions, 12 changer transitions 0/157 dead transitions. [2023-08-04 08:41:03,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 157 transitions, 1530 flow [2023-08-04 08:41:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-04 08:41:03,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-04 08:41:03,492 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-04 08:41:03,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-04 08:41:03,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:03,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-04 08:41:03,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:03,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:03,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:03,495 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 740 flow. Second operand 4 states and 498 transitions. [2023-08-04 08:41:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 157 transitions, 1530 flow [2023-08-04 08:41:04,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 157 transitions, 1503 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:04,409 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 775 flow [2023-08-04 08:41:04,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=775, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2023-08-04 08:41:04,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2023-08-04 08:41:04,410 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 775 flow [2023-08-04 08:41:04,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:04,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:04,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:04,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:04,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:04,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:04,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 812568807, now seen corresponding path program 3 times [2023-08-04 08:41:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:04,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586897531] [2023-08-04 08:41:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:04,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586897531] [2023-08-04 08:41:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586897531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:04,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:04,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:41:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716228699] [2023-08-04 08:41:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:04,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:41:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 89 transitions, 775 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:41:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:10,653 INFO L124 PetriNetUnfolderBase]: 42413/61451 cut-off events. [2023-08-04 08:41:10,653 INFO L125 PetriNetUnfolderBase]: For 369633/397510 co-relation queries the response was YES. [2023-08-04 08:41:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279076 conditions, 61451 events. 42413/61451 cut-off events. For 369633/397510 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 437726 event pairs, 11810 based on Foata normal form. 8417/68743 useless extension candidates. Maximal degree in co-relation 273282. Up to 30142 conditions per place. [2023-08-04 08:41:11,199 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 213 selfloop transitions, 18 changer transitions 0/242 dead transitions. [2023-08-04 08:41:11,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 242 transitions, 2508 flow [2023-08-04 08:41:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:41:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:41:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2023-08-04 08:41:11,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-04 08:41:11,201 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 728 transitions. [2023-08-04 08:41:11,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 728 transitions. [2023-08-04 08:41:11,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:11,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 728 transitions. [2023-08-04 08:41:11,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:11,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:11,205 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:11,205 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 775 flow. Second operand 6 states and 728 transitions. [2023-08-04 08:41:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 242 transitions, 2508 flow [2023-08-04 08:41:12,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 242 transitions, 2492 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:12,614 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 892 flow [2023-08-04 08:41:12,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=892, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-08-04 08:41:12,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2023-08-04 08:41:12,615 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 892 flow [2023-08-04 08:41:12,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:12,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:12,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 08:41:12,615 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:12,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash -988194770, now seen corresponding path program 3 times [2023-08-04 08:41:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616520084] [2023-08-04 08:41:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:41:12,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616520084] [2023-08-04 08:41:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616520084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002587202] [2023-08-04 08:41:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 08:41:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:12,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:12,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:41:12,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 08:41:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:41:12,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:41:12,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:41:12,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:41:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002587202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:12,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:12,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 08:41:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8042757] [2023-08-04 08:41:12,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:12,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:41:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:41:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:41:12,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:41:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:41:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:18,715 INFO L124 PetriNetUnfolderBase]: 41420/59705 cut-off events. [2023-08-04 08:41:18,716 INFO L125 PetriNetUnfolderBase]: For 378356/405189 co-relation queries the response was YES. [2023-08-04 08:41:18,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287386 conditions, 59705 events. 41420/59705 cut-off events. For 378356/405189 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 417701 event pairs, 11063 based on Foata normal form. 8317/66937 useless extension candidates. Maximal degree in co-relation 282049. Up to 30797 conditions per place. [2023-08-04 08:41:19,211 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 180 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2023-08-04 08:41:19,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 210 transitions, 2211 flow [2023-08-04 08:41:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:41:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:41:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-04 08:41:19,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-04 08:41:19,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-04 08:41:19,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-04 08:41:19,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:19,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-04 08:41:19,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:19,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:19,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:19,215 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 892 flow. Second operand 5 states and 612 transitions. [2023-08-04 08:41:19,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 210 transitions, 2211 flow [2023-08-04 08:41:20,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2165 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:20,987 INFO L231 Difference]: Finished difference. Result has 114 places, 97 transitions, 931 flow [2023-08-04 08:41:20,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=931, PETRI_PLACES=114, PETRI_TRANSITIONS=97} [2023-08-04 08:41:20,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-04 08:41:20,987 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 97 transitions, 931 flow [2023-08-04 08:41:20,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:20,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:20,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:20,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:21,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:21,188 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:21,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1363079209, now seen corresponding path program 4 times [2023-08-04 08:41:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:21,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450727980] [2023-08-04 08:41:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:41:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:21,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450727980] [2023-08-04 08:41:21,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450727980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:21,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:21,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:41:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863080116] [2023-08-04 08:41:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:21,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 08:41:21,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 97 transitions, 931 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 08:41:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:26,834 INFO L124 PetriNetUnfolderBase]: 40552/58696 cut-off events. [2023-08-04 08:41:26,835 INFO L125 PetriNetUnfolderBase]: For 412740/439489 co-relation queries the response was YES. [2023-08-04 08:41:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285263 conditions, 58696 events. 40552/58696 cut-off events. For 412740/439489 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 415773 event pairs, 10153 based on Foata normal form. 8467/66078 useless extension candidates. Maximal degree in co-relation 280035. Up to 27043 conditions per place. [2023-08-04 08:41:27,369 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 183 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2023-08-04 08:41:27,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 210 transitions, 2254 flow [2023-08-04 08:41:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:41:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:41:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-04 08:41:27,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-04 08:41:27,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-04 08:41:27,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-04 08:41:27,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:27,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-04 08:41:27,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:27,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:27,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:27,374 INFO L175 Difference]: Start difference. First operand has 114 places, 97 transitions, 931 flow. Second operand 5 states and 612 transitions. [2023-08-04 08:41:27,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 210 transitions, 2254 flow [2023-08-04 08:41:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 210 transitions, 2231 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:29,334 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 991 flow [2023-08-04 08:41:29,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=991, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2023-08-04 08:41:29,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2023-08-04 08:41:29,334 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 991 flow [2023-08-04 08:41:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:29,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:29,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:29,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 08:41:29,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:29,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1482601508, now seen corresponding path program 1 times [2023-08-04 08:41:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:29,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651282416] [2023-08-04 08:41:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:41:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651282416] [2023-08-04 08:41:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651282416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:29,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 08:41:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736115146] [2023-08-04 08:41:29,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:29,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:29,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 08:41:29,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 991 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:29,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:29,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 08:41:29,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:35,927 INFO L124 PetriNetUnfolderBase]: 40888/60929 cut-off events. [2023-08-04 08:41:35,927 INFO L125 PetriNetUnfolderBase]: For 496365/524599 co-relation queries the response was YES. [2023-08-04 08:41:36,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301026 conditions, 60929 events. 40888/60929 cut-off events. For 496365/524599 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 454381 event pairs, 12375 based on Foata normal form. 9018/69328 useless extension candidates. Maximal degree in co-relation 295389. Up to 28834 conditions per place. [2023-08-04 08:41:36,530 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 233 selfloop transitions, 12 changer transitions 5/262 dead transitions. [2023-08-04 08:41:36,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 262 transitions, 3032 flow [2023-08-04 08:41:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:41:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:41:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 631 transitions. [2023-08-04 08:41:36,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393162393162393 [2023-08-04 08:41:36,532 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 631 transitions. [2023-08-04 08:41:36,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 631 transitions. [2023-08-04 08:41:36,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:36,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 631 transitions. [2023-08-04 08:41:36,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:36,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:36,535 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:36,535 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 991 flow. Second operand 5 states and 631 transitions. [2023-08-04 08:41:36,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 262 transitions, 3032 flow [2023-08-04 08:41:38,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 262 transitions, 2951 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:38,471 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 1035 flow [2023-08-04 08:41:38,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2023-08-04 08:41:38,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2023-08-04 08:41:38,472 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 1035 flow [2023-08-04 08:41:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:38,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-04 08:41:38,473 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:38,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -221053336, now seen corresponding path program 2 times [2023-08-04 08:41:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65041996] [2023-08-04 08:41:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:41:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65041996] [2023-08-04 08:41:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65041996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541852743] [2023-08-04 08:41:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:41:38,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:38,561 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:38,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:41:38,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:41:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:41:38,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:41:38,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:41:38,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:41:38,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541852743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:38,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:38,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 08:41:38,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99959642] [2023-08-04 08:41:38,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:38,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:41:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:41:38,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:41:38,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:41:38,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 1035 flow. Second operand has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:38,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:38,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:41:38,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:45,278 INFO L124 PetriNetUnfolderBase]: 40058/59604 cut-off events. [2023-08-04 08:41:45,278 INFO L125 PetriNetUnfolderBase]: For 487971/513978 co-relation queries the response was YES. [2023-08-04 08:41:45,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304550 conditions, 59604 events. 40058/59604 cut-off events. For 487971/513978 co-relation queries the response was YES. Maximal size of possible extension queue 2124. Compared 439593 event pairs, 15081 based on Foata normal form. 7552/66475 useless extension candidates. Maximal degree in co-relation 299319. Up to 29458 conditions per place. [2023-08-04 08:41:45,867 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 225 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2023-08-04 08:41:45,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 2889 flow [2023-08-04 08:41:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:41:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:41:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-04 08:41:45,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-04 08:41:45,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-04 08:41:45,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-04 08:41:45,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:45,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-04 08:41:45,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:45,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:45,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:45,870 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 1035 flow. Second operand 5 states and 627 transitions. [2023-08-04 08:41:45,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 2889 flow [2023-08-04 08:41:47,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 255 transitions, 2864 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:47,669 INFO L231 Difference]: Finished difference. Result has 130 places, 103 transitions, 1089 flow [2023-08-04 08:41:47,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1089, PETRI_PLACES=130, PETRI_TRANSITIONS=103} [2023-08-04 08:41:47,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-04 08:41:47,670 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 103 transitions, 1089 flow [2023-08-04 08:41:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:47,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:47,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:47,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:47,871 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:47,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1002814066, now seen corresponding path program 2 times [2023-08-04 08:41:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070533425] [2023-08-04 08:41:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:41:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070533425] [2023-08-04 08:41:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070533425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591398548] [2023-08-04 08:41:47,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:41:47,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:47,952 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:47,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:41:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:41:48,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:41:48,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:41:48,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:41:48,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:41:48,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591398548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:48,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:48,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 08:41:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336639484] [2023-08-04 08:41:48,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:41:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:48,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:41:48,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:41:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 08:41:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 103 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 106.0) internal successors, (848), 8 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:48,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:48,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 08:41:48,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:54,346 INFO L124 PetriNetUnfolderBase]: 37426/54884 cut-off events. [2023-08-04 08:41:54,347 INFO L125 PetriNetUnfolderBase]: For 468120/492488 co-relation queries the response was YES. [2023-08-04 08:41:54,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290077 conditions, 54884 events. 37426/54884 cut-off events. For 468120/492488 co-relation queries the response was YES. Maximal size of possible extension queue 1945. Compared 398960 event pairs, 9876 based on Foata normal form. 7148/61410 useless extension candidates. Maximal degree in co-relation 285428. Up to 23833 conditions per place. [2023-08-04 08:41:54,918 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 221 selfloop transitions, 21 changer transitions 0/254 dead transitions. [2023-08-04 08:41:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 254 transitions, 2956 flow [2023-08-04 08:41:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:41:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:41:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2023-08-04 08:41:54,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2023-08-04 08:41:54,920 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2023-08-04 08:41:54,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2023-08-04 08:41:54,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:54,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2023-08-04 08:41:54,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:54,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:54,922 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:54,922 INFO L175 Difference]: Start difference. First operand has 130 places, 103 transitions, 1089 flow. Second operand 5 states and 625 transitions. [2023-08-04 08:41:54,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 254 transitions, 2956 flow [2023-08-04 08:41:56,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 254 transitions, 2914 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-04 08:41:56,477 INFO L231 Difference]: Finished difference. Result has 133 places, 105 transitions, 1149 flow [2023-08-04 08:41:56,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1149, PETRI_PLACES=133, PETRI_TRANSITIONS=105} [2023-08-04 08:41:56,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2023-08-04 08:41:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 105 transitions, 1149 flow [2023-08-04 08:41:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.0) internal successors, (848), 8 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:56,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:56,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-04 08:41:56,682 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:56,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash -215712438, now seen corresponding path program 1 times [2023-08-04 08:41:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:56,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766107555] [2023-08-04 08:41:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766107555] [2023-08-04 08:41:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766107555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:57,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776752345] [2023-08-04 08:41:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:57,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:57,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:41:57,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:41:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:57,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:41:57,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:57,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776752345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:57,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:57,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 08:41:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890210288] [2023-08-04 08:41:57,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:41:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:41:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:41:57,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-04 08:41:57,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 105 transitions, 1149 flow. Second operand has 13 states, 13 states have (on average 104.07692307692308) internal successors, (1353), 13 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:57,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:57,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-04 08:41:57,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:03,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 08:42:05,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 08:42:16,478 INFO L124 PetriNetUnfolderBase]: 44462/66713 cut-off events. [2023-08-04 08:42:16,478 INFO L125 PetriNetUnfolderBase]: For 529441/560742 co-relation queries the response was YES. [2023-08-04 08:42:16,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349208 conditions, 66713 events. 44462/66713 cut-off events. For 529441/560742 co-relation queries the response was YES. Maximal size of possible extension queue 2454. Compared 520990 event pairs, 6898 based on Foata normal form. 11656/77088 useless extension candidates. Maximal degree in co-relation 342563. Up to 38600 conditions per place. [2023-08-04 08:42:17,141 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 126 selfloop transitions, 22 changer transitions 143/307 dead transitions. [2023-08-04 08:42:17,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 307 transitions, 3212 flow [2023-08-04 08:42:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:42:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:42:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2023-08-04 08:42:17,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2023-08-04 08:42:17,142 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2023-08-04 08:42:17,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2023-08-04 08:42:17,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:17,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2023-08-04 08:42:17,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:17,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 234.0) internal successors, (2106), 9 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:17,145 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 234.0) internal successors, (2106), 9 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:17,145 INFO L175 Difference]: Start difference. First operand has 133 places, 105 transitions, 1149 flow. Second operand 8 states and 968 transitions. [2023-08-04 08:42:17,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 307 transitions, 3212 flow [2023-08-04 08:42:20,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 307 transitions, 3164 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-04 08:42:20,416 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 1381 flow [2023-08-04 08:42:20,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2023-08-04 08:42:20,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2023-08-04 08:42:20,417 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 1381 flow [2023-08-04 08:42:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.07692307692308) internal successors, (1353), 13 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:20,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:20,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:42:20,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:20,619 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:20,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -492471781, now seen corresponding path program 1 times [2023-08-04 08:42:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:20,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413799886] [2023-08-04 08:42:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:42:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413799886] [2023-08-04 08:42:21,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413799886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091405648] [2023-08-04 08:42:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:21,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:21,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:21,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:21,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:42:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:21,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-04 08:42:21,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:21,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-04 08:42:21,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-04 08:42:21,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-04 08:42:21,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-08-04 08:42:21,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-08-04 08:42:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:42:21,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:42:22,690 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4294967296 |c_#pthreadsForks|)) (.cse3 (+ c_thread2Thread1of2ForFork1_thidvar0 4294967296)) (.cse5 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse2 (mod (select .cse4 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse0 (mod (select .cse4 .cse5) 4294967296))) (or (not (= .cse0 .cse1)) (not (= .cse2 .cse3)) (<= .cse2 2147483647) (<= .cse0 2147483647))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse7 (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse6 (mod (select .cse8 .cse5) 4294967296))) (or (not (= .cse6 .cse1)) (< 2147483647 .cse7) (not (= .cse7 c_thread2Thread1of2ForFork1_thidvar0)) (<= .cse6 2147483647))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse9 (mod (select .cse11 .cse5) 4294967296)) (.cse10 (mod (select .cse11 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse9 |c_#pthreadsForks|)) (< 2147483647 .cse9) (< 2147483647 .cse10) (not (= .cse10 c_thread2Thread1of2ForFork1_thidvar0)))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse12 (mod (select .cse14 .cse5) 4294967296)) (.cse13 (mod (select .cse14 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse12 |c_#pthreadsForks|)) (< 2147483647 .cse12) (not (= .cse13 .cse3)) (<= .cse13 2147483647))))))) is different from false [2023-08-04 08:42:23,040 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 4294967296 |c_ULTIMATE.start_main_#t~pre9#1|)) (.cse1 (+ 4294967296 |c_#pthreadsForks|)) (.cse5 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse2 (mod (select .cse4 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse0 (mod (select .cse4 .cse5) 4294967296))) (or (not (= .cse0 .cse1)) (not (= .cse2 .cse3)) (<= .cse2 2147483647) (<= .cse0 2147483647))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse8 .cse5) 4294967296)) (.cse7 (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse6 |c_#pthreadsForks|)) (< 2147483647 .cse6) (not (= .cse7 |c_ULTIMATE.start_main_#t~pre9#1|)) (< 2147483647 .cse7))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse9 (mod (select .cse11 .cse5) 4294967296)) (.cse10 (mod (select .cse11 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse9 |c_#pthreadsForks|)) (< 2147483647 .cse9) (not (= .cse10 .cse3)) (<= .cse10 2147483647))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse12 (mod (select .cse14 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse13 (mod (select .cse14 .cse5) 4294967296))) (or (not (= .cse12 |c_ULTIMATE.start_main_#t~pre9#1|)) (not (= .cse13 .cse1)) (< 2147483647 .cse12) (<= .cse13 2147483647))))))) is different from false [2023-08-04 08:42:23,359 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4294967297 |c_#pthreadsForks|)) (.cse5 (+ 2 |c_#pthreadsForks|)) (.cse3 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4)) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse2 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse0 (mod (select .cse2 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse0 .cse1)) (<= .cse0 2147483647) (not (= (mod (select .cse2 .cse3) 4294967296) (+ |c_#pthreadsForks| 4294967298))))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse6 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse5 (mod (select .cse6 .cse3) 4294967296))) (not (= (mod (select .cse6 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) .cse1))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse8 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse7 (mod (select .cse8 .cse3) 4294967296))) (or (not (= .cse5 .cse7)) (not (= (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) (+ |c_#pthreadsForks| 1))) (< 2147483647 .cse7))))))) is different from false [2023-08-04 08:42:23,404 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4294967297 |c_#pthreadsForks|)) (.cse6 (+ 2 |c_#pthreadsForks|)) (.cse3 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4) 4) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse2 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse1 (mod (select .cse2 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse0 .cse1)) (not (= (mod (select .cse2 .cse3) 4294967296) (+ |c_#pthreadsForks| 4294967298))) (<= .cse1 2147483647))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= (mod (select .cse5 .cse3) 4294967296) .cse6)) (not (= .cse0 (mod (select .cse5 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)))))) (forall ((v_ArrVal_600 (Array Int Int))) (let ((.cse8 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse7 (mod (select .cse8 .cse3) 4294967296))) (or (not (= .cse7 .cse6)) (not (= (+ |c_#pthreadsForks| 1) (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (< 2147483647 .cse7))))))) is different from false [2023-08-04 08:42:23,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:23,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 74 [2023-08-04 08:42:23,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:23,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 122 [2023-08-04 08:42:23,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:23,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 62 [2023-08-04 08:42:23,693 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-04 08:42:23,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 1 [2023-08-04 08:42:23,704 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-04 08:42:23,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 1 [2023-08-04 08:42:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 10 not checked. [2023-08-04 08:42:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091405648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:42:23,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:42:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 35 [2023-08-04 08:42:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615833550] [2023-08-04 08:42:23,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:42:23,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 08:42:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 08:42:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=885, Unknown=4, NotChecked=252, Total=1260 [2023-08-04 08:42:23,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 234 [2023-08-04 08:42:23,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 1381 flow. Second operand has 36 states, 36 states have (on average 72.72222222222223) internal successors, (2618), 36 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:23,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:23,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 234 [2023-08-04 08:42:23,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:32,618 INFO L124 PetriNetUnfolderBase]: 25107/34445 cut-off events. [2023-08-04 08:42:32,619 INFO L125 PetriNetUnfolderBase]: For 426327/451271 co-relation queries the response was YES. [2023-08-04 08:42:32,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204075 conditions, 34445 events. 25107/34445 cut-off events. For 426327/451271 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 203211 event pairs, 70 based on Foata normal form. 10375/44327 useless extension candidates. Maximal degree in co-relation 203893. Up to 16111 conditions per place. [2023-08-04 08:42:32,982 INFO L140 encePairwiseOnDemand]: 206/234 looper letters, 810 selfloop transitions, 69 changer transitions 0/898 dead transitions. [2023-08-04 08:42:32,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 898 transitions, 13809 flow [2023-08-04 08:42:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-04 08:42:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-04 08:42:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2382 transitions. [2023-08-04 08:42:32,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3283705541770058 [2023-08-04 08:42:32,986 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2382 transitions. [2023-08-04 08:42:32,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2382 transitions. [2023-08-04 08:42:32,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:32,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2382 transitions. [2023-08-04 08:42:32,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.83870967741936) internal successors, (2382), 31 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:32,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 234.0) internal successors, (7488), 32 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:32,994 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 234.0) internal successors, (7488), 32 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:32,994 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 1381 flow. Second operand 31 states and 2382 transitions. [2023-08-04 08:42:32,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 898 transitions, 13809 flow [2023-08-04 08:42:33,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 898 transitions, 12979 flow, removed 227 selfloop flow, removed 5 redundant places. [2023-08-04 08:42:33,964 INFO L231 Difference]: Finished difference. Result has 169 places, 161 transitions, 2059 flow [2023-08-04 08:42:33,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2059, PETRI_PLACES=169, PETRI_TRANSITIONS=161} [2023-08-04 08:42:33,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2023-08-04 08:42:33,965 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 161 transitions, 2059 flow [2023-08-04 08:42:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 72.72222222222223) internal successors, (2618), 36 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:33,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:33,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:33,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:42:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:34,172 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:34,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1085555483, now seen corresponding path program 1 times [2023-08-04 08:42:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:34,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072616035] [2023-08-04 08:42:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:42:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072616035] [2023-08-04 08:42:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072616035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746352015] [2023-08-04 08:42:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:34,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:34,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:34,805 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:34,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:42:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:34,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-04 08:42:34,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:34,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-04 08:42:34,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-04 08:42:35,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-04 08:42:35,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-08-04 08:42:35,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-08-04 08:42:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:42:35,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:42:36,062 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (+ c_thread2Thread1of2ForFork1_thidvar0 4294967296)) (.cse6 (+ 4294967296 c_thread1Thread2of2ForFork0_thidvar0)) (.cse3 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse1 (mod (select .cse2 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse0 (mod (select .cse2 .cse3) 4294967296))) (or (< 2147483647 .cse0) (< 2147483647 .cse1) (not (= .cse1 c_thread1Thread2of2ForFork0_thidvar0)) (not (= c_thread2Thread1of2ForFork1_thidvar0 .cse0)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse5 (mod (select .cse7 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse4 (mod (select .cse7 .cse3) 4294967296))) (or (< 2147483647 .cse4) (<= .cse5 2147483647) (not (= .cse5 .cse6)) (not (= c_thread2Thread1of2ForFork1_thidvar0 .cse4)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse8 (mod (select .cse11 .cse3) 4294967296)) (.cse10 (mod (select .cse11 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse8 .cse9)) (< 2147483647 .cse10) (<= .cse8 2147483647) (not (= .cse10 c_thread1Thread2of2ForFork0_thidvar0)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse13 (mod (select .cse14 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse12 (mod (select .cse14 .cse3) 4294967296))) (or (not (= .cse12 .cse9)) (<= .cse13 2147483647) (not (= .cse13 .cse6)) (<= .cse12 2147483647))))))) is different from false [2023-08-04 08:42:36,510 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ 4294967296 c_thread1Thread2of2ForFork0_thidvar0)) (.cse2 (+ 4294967296 |c_#pthreadsForks|)) (.cse4 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse0 (mod (select .cse3 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse1 (mod (select .cse3 .cse4) 4294967296))) (or (< 2147483647 .cse0) (<= .cse1 2147483647) (not (= .cse0 c_thread1Thread2of2ForFork0_thidvar0)) (not (= .cse1 .cse2)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse5 (mod (select .cse8 .cse4) 4294967296))) (or (< 2147483647 .cse5) (<= .cse6 2147483647) (not (= .cse6 .cse7)) (not (= .cse5 |c_#pthreadsForks|)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse9 (mod (select .cse11 .cse4) 4294967296)) (.cse10 (mod (select .cse11 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (< 2147483647 .cse9) (< 2147483647 .cse10) (not (= .cse9 |c_#pthreadsForks|)) (not (= .cse10 c_thread1Thread2of2ForFork0_thidvar0)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse12 (mod (select .cse14 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse13 (mod (select .cse14 .cse4) 4294967296))) (or (<= .cse12 2147483647) (not (= .cse12 .cse7)) (<= .cse13 2147483647) (not (= .cse13 .cse2)))))))) is different from false [2023-08-04 08:42:36,955 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ 4294967296 |c_#pthreadsForks|)) (.cse2 (+ |c_ULTIMATE.start_main_#t~pre6#1| 4294967296)) (.cse4 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse0 (mod (select .cse3 .cse4) 4294967296)) (.cse1 (mod (select .cse3 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (< 2147483647 .cse0) (<= .cse1 2147483647) (not (= .cse0 |c_#pthreadsForks|)) (not (= .cse2 .cse1)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse5 (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse6 (mod (select .cse8 .cse4) 4294967296))) (or (< 2147483647 .cse5) (not (= .cse5 |c_ULTIMATE.start_main_#t~pre6#1|)) (<= .cse6 2147483647) (not (= .cse6 .cse7)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse10 (mod (select .cse11 .cse4) 4294967296)) (.cse9 (mod (select .cse11 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (<= .cse9 2147483647) (<= .cse10 2147483647) (not (= .cse10 .cse7)) (not (= .cse2 .cse9)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse13 (mod (select .cse14 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)) (.cse12 (mod (select .cse14 .cse4) 4294967296))) (or (< 2147483647 .cse12) (< 2147483647 .cse13) (not (= .cse13 |c_ULTIMATE.start_main_#t~pre6#1|)) (not (= .cse12 |c_#pthreadsForks|)))))))) is different from false [2023-08-04 08:42:37,021 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ |c_#pthreadsForks| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse3 (+ 4294967296 |c_#pthreadsForks|)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4)) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse1 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse0 (mod (select .cse1 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (<= .cse0 2147483647) (not (= (+ 4294967297 |c_#pthreadsForks|) (mod (select .cse1 .cse2) 4294967296))) (not (= .cse0 .cse3)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse5 .cse2) 4294967296))) (or (not (= (mod (select .cse5 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) |c_#pthreadsForks|)) (< 2147483647 .cse6) (not (= .cse7 .cse6)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse8 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse7 (mod (select .cse8 .cse2) 4294967296))) (not (= (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) .cse3))))))) is different from false [2023-08-04 08:42:37,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_#pthreadsForks| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse3 (+ 4294967296 |c_#pthreadsForks|)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4) 4) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse1 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse0 (mod (select .cse1 .cse2) 4294967296))) (not (= .cse3 (mod (select .cse1 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse6 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse5 (mod (select .cse6 .cse2) 4294967296))) (or (< 2147483647 .cse5) (not (= .cse0 .cse5)) (not (= |c_#pthreadsForks| (mod (select .cse6 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))))))) (forall ((v_ArrVal_633 (Array Int Int))) (let ((.cse7 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse8 (mod (select .cse7 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= (+ 4294967297 |c_#pthreadsForks|) (mod (select .cse7 .cse2) 4294967296))) (<= .cse8 2147483647) (not (= .cse3 .cse8)))))))) is different from false [2023-08-04 08:42:37,263 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:37,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 60 [2023-08-04 08:42:37,284 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:37,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 99 [2023-08-04 08:42:37,292 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:42:37,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 53 [2023-08-04 08:42:37,390 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-04 08:42:37,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 1 [2023-08-04 08:42:37,397 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-04 08:42:37,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 1 [2023-08-04 08:42:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 11 not checked. [2023-08-04 08:42:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746352015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:42:37,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:42:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 14] total 29 [2023-08-04 08:42:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261385004] [2023-08-04 08:42:37,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:42:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 08:42:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 08:42:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=525, Unknown=6, NotChecked=250, Total=870 [2023-08-04 08:42:37,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 234 [2023-08-04 08:42:37,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 161 transitions, 2059 flow. Second operand has 30 states, 30 states have (on average 68.53333333333333) internal successors, (2056), 30 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:37,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:37,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 234 [2023-08-04 08:42:37,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:49,530 INFO L124 PetriNetUnfolderBase]: 37218/49779 cut-off events. [2023-08-04 08:42:49,530 INFO L125 PetriNetUnfolderBase]: For 638220/658484 co-relation queries the response was YES. [2023-08-04 08:42:50,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322203 conditions, 49779 events. 37218/49779 cut-off events. For 638220/658484 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 281949 event pairs, 2047 based on Foata normal form. 11325/60669 useless extension candidates. Maximal degree in co-relation 321978. Up to 25566 conditions per place. [2023-08-04 08:42:50,393 INFO L140 encePairwiseOnDemand]: 213/234 looper letters, 583 selfloop transitions, 665 changer transitions 15/1280 dead transitions. [2023-08-04 08:42:50,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1280 transitions, 18859 flow [2023-08-04 08:42:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-04 08:42:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-04 08:42:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4976 transitions. [2023-08-04 08:42:50,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.308187786448656 [2023-08-04 08:42:50,405 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4976 transitions. [2023-08-04 08:42:50,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4976 transitions. [2023-08-04 08:42:50,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:42:50,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4976 transitions. [2023-08-04 08:42:50,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 72.1159420289855) internal successors, (4976), 69 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:50,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 234.0) internal successors, (16380), 70 states have internal predecessors, (16380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:50,430 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 234.0) internal successors, (16380), 70 states have internal predecessors, (16380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:50,431 INFO L175 Difference]: Start difference. First operand has 169 places, 161 transitions, 2059 flow. Second operand 69 states and 4976 transitions. [2023-08-04 08:42:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1280 transitions, 18859 flow [2023-08-04 08:42:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1280 transitions, 18381 flow, removed 97 selfloop flow, removed 25 redundant places. [2023-08-04 08:42:52,798 INFO L231 Difference]: Finished difference. Result has 228 places, 889 transitions, 14579 flow [2023-08-04 08:42:52,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=14579, PETRI_PLACES=228, PETRI_TRANSITIONS=889} [2023-08-04 08:42:52,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2023-08-04 08:42:52,799 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 889 transitions, 14579 flow [2023-08-04 08:42:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 68.53333333333333) internal successors, (2056), 30 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:52,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:52,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:52,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:42:53,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:53,005 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:53,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1173213539, now seen corresponding path program 1 times [2023-08-04 08:42:53,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:53,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125660568] [2023-08-04 08:42:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:42:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125660568] [2023-08-04 08:42:53,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125660568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:42:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262678313] [2023-08-04 08:42:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:53,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:42:53,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:53,293 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:42:53,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:42:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:53,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 08:42:53,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:42:53,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-04 08:42:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:42:53,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-04 08:42:53,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-04 08:42:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:42:53,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:42:54,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-04 08:42:54,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 244 [2023-08-04 08:42:54,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-04 08:42:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:42:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262678313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:42:54,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:42:54,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 22 [2023-08-04 08:42:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314573514] [2023-08-04 08:42:54,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:42:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-04 08:42:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-04 08:42:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-08-04 08:42:55,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 234 [2023-08-04 08:42:55,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 889 transitions, 14579 flow. Second operand has 22 states, 22 states have (on average 88.31818181818181) internal successors, (1943), 22 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:55,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:55,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 234 [2023-08-04 08:42:55,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:15,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 08:43:17,455 INFO L124 PetriNetUnfolderBase]: 40549/54831 cut-off events. [2023-08-04 08:43:17,455 INFO L125 PetriNetUnfolderBase]: For 969096/990691 co-relation queries the response was YES. [2023-08-04 08:43:18,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394876 conditions, 54831 events. 40549/54831 cut-off events. For 969096/990691 co-relation queries the response was YES. Maximal size of possible extension queue 2372. Compared 323602 event pairs, 2881 based on Foata normal form. 11682/66193 useless extension candidates. Maximal degree in co-relation 393563. Up to 33917 conditions per place. [2023-08-04 08:43:18,521 INFO L140 encePairwiseOnDemand]: 216/234 looper letters, 1114 selfloop transitions, 748 changer transitions 23/1913 dead transitions. [2023-08-04 08:43:18,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1913 transitions, 34534 flow [2023-08-04 08:43:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-04 08:43:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-04 08:43:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3854 transitions. [2023-08-04 08:43:18,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921448921448921 [2023-08-04 08:43:18,526 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3854 transitions. [2023-08-04 08:43:18,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3854 transitions. [2023-08-04 08:43:18,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:18,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3854 transitions. [2023-08-04 08:43:18,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 91.76190476190476) internal successors, (3854), 42 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:18,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 234.0) internal successors, (10062), 43 states have internal predecessors, (10062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:18,538 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 234.0) internal successors, (10062), 43 states have internal predecessors, (10062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:18,538 INFO L175 Difference]: Start difference. First operand has 228 places, 889 transitions, 14579 flow. Second operand 42 states and 3854 transitions. [2023-08-04 08:43:18,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1913 transitions, 34534 flow [2023-08-04 08:43:25,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1913 transitions, 31757 flow, removed 1310 selfloop flow, removed 14 redundant places. [2023-08-04 08:43:25,155 INFO L231 Difference]: Finished difference. Result has 272 places, 1373 transitions, 22881 flow [2023-08-04 08:43:25,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=13122, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22881, PETRI_PLACES=272, PETRI_TRANSITIONS=1373} [2023-08-04 08:43:25,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2023-08-04 08:43:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 1373 transitions, 22881 flow [2023-08-04 08:43:25,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.31818181818181) internal successors, (1943), 22 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:25,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:25,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:25,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:43:25,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:25,361 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:25,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:25,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1686417443, now seen corresponding path program 2 times [2023-08-04 08:43:25,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:25,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948877252] [2023-08-04 08:43:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:25,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:25,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948877252] [2023-08-04 08:43:25,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948877252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784223456] [2023-08-04 08:43:25,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:43:25,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:25,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:25,729 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:43:25,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:43:25,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:43:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:43:25,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:43:25,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:26,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:43:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:43:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784223456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:43:26,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:43:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 08:43:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649977046] [2023-08-04 08:43:26,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:43:26,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:43:26,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:26,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:43:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:43:26,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-04 08:43:26,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 1373 transitions, 22881 flow. Second operand has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:26,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:26,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-04 08:43:26,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:41,439 INFO L124 PetriNetUnfolderBase]: 45066/62691 cut-off events. [2023-08-04 08:43:41,439 INFO L125 PetriNetUnfolderBase]: For 1178696/1202027 co-relation queries the response was YES. [2023-08-04 08:43:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461067 conditions, 62691 events. 45066/62691 cut-off events. For 1178696/1202027 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 409654 event pairs, 4509 based on Foata normal form. 12893/75188 useless extension candidates. Maximal degree in co-relation 460629. Up to 34336 conditions per place. [2023-08-04 08:43:42,595 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 669 selfloop transitions, 1329 changer transitions 27/2068 dead transitions. [2023-08-04 08:43:42,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 2068 transitions, 36666 flow [2023-08-04 08:43:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 08:43:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 08:43:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1479 transitions. [2023-08-04 08:43:42,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48619329388560156 [2023-08-04 08:43:42,597 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1479 transitions. [2023-08-04 08:43:42,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1479 transitions. [2023-08-04 08:43:42,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:42,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1479 transitions. [2023-08-04 08:43:42,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 113.76923076923077) internal successors, (1479), 13 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:42,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 234.0) internal successors, (3276), 14 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:42,602 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 234.0) internal successors, (3276), 14 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:42,602 INFO L175 Difference]: Start difference. First operand has 272 places, 1373 transitions, 22881 flow. Second operand 13 states and 1479 transitions. [2023-08-04 08:43:42,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 2068 transitions, 36666 flow [2023-08-04 08:43:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 2068 transitions, 36084 flow, removed 238 selfloop flow, removed 8 redundant places. [2023-08-04 08:43:55,198 INFO L231 Difference]: Finished difference. Result has 277 places, 1819 transitions, 33577 flow [2023-08-04 08:43:55,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=22373, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=33577, PETRI_PLACES=277, PETRI_TRANSITIONS=1819} [2023-08-04 08:43:55,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2023-08-04 08:43:55,200 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1819 transitions, 33577 flow [2023-08-04 08:43:55,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:55,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:55,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:55,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-04 08:43:55,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-04 08:43:55,401 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:55,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:55,401 INFO L85 PathProgramCache]: Analyzing trace with hash -547555424, now seen corresponding path program 2 times [2023-08-04 08:43:55,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:55,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143038722] [2023-08-04 08:43:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:43:55,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143038722] [2023-08-04 08:43:55,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143038722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255130347] [2023-08-04 08:43:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:43:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:55,743 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:43:55,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:43:55,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:43:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:43:55,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:43:55,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:43:56,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:43:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:43:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255130347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:43:56,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:43:56,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 08:43:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627018851] [2023-08-04 08:43:56,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:43:56,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:43:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:43:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:43:57,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 234 [2023-08-04 08:43:57,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1819 transitions, 33577 flow. Second operand has 13 states, 13 states have (on average 102.53846153846153) internal successors, (1333), 13 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:57,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:57,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 234 [2023-08-04 08:43:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand