/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 INSUFFICIENT_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 02:20:04,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:20:04,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:20:04,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:20:04,814 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:20:04,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:20:04,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:20:04,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:20:04,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:20:04,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:20:04,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:20:04,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:20:04,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:20:04,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:20:04,852 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:20:04,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:20:04,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:20:04,853 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:20:04,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:20:04,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:20:04,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:20:04,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:20:04,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:20:04,854 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:20:04,856 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:20:04,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:20:04,856 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:20:04,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:20:04,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:20:04,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:20:04,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:20:04,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:20:04,859 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:20:04,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:20:04,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:20:04,860 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:20:04,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:20:05,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:20:05,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:20:05,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:20:05,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:20:05,138 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:20:05,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-04 02:20:06,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:20:06,563 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:20:06,563 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-04 02:20:06,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca3321aa/e53c1d2516ff48a4baad2a7052ed982d/FLAGa7786195f [2023-08-04 02:20:06,591 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca3321aa/e53c1d2516ff48a4baad2a7052ed982d [2023-08-04 02:20:06,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:20:06,598 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:20:06,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:20:06,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:20:06,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:20:06,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d94ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06, skipping insertion in model container [2023-08-04 02:20:06,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,631 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:20:06,801 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 02:20:06,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:20:06,811 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:20:06,829 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 02:20:06,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:20:06,842 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:20:06,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06 WrapperNode [2023-08-04 02:20:06,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:20:06,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:20:06,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:20:06,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:20:06,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,873 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-04 02:20:06,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:20:06,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:20:06,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:20:06,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:20:06,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:20:06,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:20:06,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:20:06,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:20:06,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (1/1) ... [2023-08-04 02:20:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:20:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:06,942 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 02:20:06,952 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 02:20:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:20:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:20:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:20:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:20:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:20:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:20:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:20:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:20:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:20:06,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:20:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:20:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:20:06,983 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 02:20:07,074 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:20:07,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:20:07,246 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:20:07,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:20:07,256 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:20:07,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:20:07 BoogieIcfgContainer [2023-08-04 02:20:07,261 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:20:07,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:20:07,263 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:20:07,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:20:07,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:20:06" (1/3) ... [2023-08-04 02:20:07,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57eb2a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:20:07, skipping insertion in model container [2023-08-04 02:20:07,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:20:06" (2/3) ... [2023-08-04 02:20:07,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57eb2a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:20:07, skipping insertion in model container [2023-08-04 02:20:07,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:20:07" (3/3) ... [2023-08-04 02:20:07,278 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_mult-comm.wvr_bound2.c [2023-08-04 02:20:07,303 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:20:07,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:20:07,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:20:07,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:20:07,405 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:20:07,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,542 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 02:20:07,543 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:20:07,549 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 02:20:07,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:20:07,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,590 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-04 02:20:07,631 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-04 02:20:07,631 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:20:07,633 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 02:20:07,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-04 02:20:09,545 INFO L134 LiptonReduction]: Checked pairs total: 2818 [2023-08-04 02:20:09,546 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-04 02:20:09,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:20:09,565 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;@1af17e99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:20:09,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:20:09,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:20:09,571 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 02:20:09,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:20:09,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:09,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:20:09,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:20:09,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -827730633, now seen corresponding path program 1 times [2023-08-04 02:20:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:09,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915190431] [2023-08-04 02:20:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:20:09,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:20:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:20:09,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:20:09,710 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:20:09,711 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:20:09,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:20:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:20:09,714 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:20:09,716 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:20:09,717 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:20:09,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:20:09,736 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:20:09,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,859 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 02:20:09,859 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:20:09,869 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 02:20:09,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:20:09,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:09,970 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 02:20:09,970 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:20:09,976 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 02:20:09,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 02:20:12,015 INFO L134 LiptonReduction]: Checked pairs total: 8863 [2023-08-04 02:20:12,016 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 02:20:12,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:20:12,019 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;@1af17e99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:20:12,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:20:12,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:20:12,024 INFO L124 PetriNetUnfolderBase]: 7/67 cut-off events. [2023-08-04 02:20:12,025 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:20:12,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:12,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:20:12,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:20:12,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:12,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2090564366, now seen corresponding path program 1 times [2023-08-04 02:20:12,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:12,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654436348] [2023-08-04 02:20:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:20:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654436348] [2023-08-04 02:20:12,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654436348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381543205] [2023-08-04 02:20:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:12,165 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 02:20:12,188 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 02:20:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:12,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:20:12,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:20:12,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:20:12,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381543205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:12,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:20:12,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:20:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169818445] [2023-08-04 02:20:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:12,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:12,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:12,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 02:20:12,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:12,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:12,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:13,368 INFO L124 PetriNetUnfolderBase]: 8553/11151 cut-off events. [2023-08-04 02:20:13,368 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2023-08-04 02:20:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22551 conditions, 11151 events. 8553/11151 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 50018 event pairs, 2448 based on Foata normal form. 0/6346 useless extension candidates. Maximal degree in co-relation 6846. Up to 10615 conditions per place. [2023-08-04 02:20:13,401 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 23 selfloop transitions, 5 changer transitions 17/52 dead transitions. [2023-08-04 02:20:13,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 234 flow [2023-08-04 02:20:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:20:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:20:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-04 02:20:13,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2023-08-04 02:20:13,420 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-04 02:20:13,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-04 02:20:13,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:13,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-04 02:20:13,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 02:20:13,433 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 02:20:13,434 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 02:20:13,436 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 5 states and 575 transitions. [2023-08-04 02:20:13,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 234 flow [2023-08-04 02:20:13,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:20:13,443 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 91 flow [2023-08-04 02:20:13,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 02:20:13,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 02:20:13,447 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 91 flow [2023-08-04 02:20:13,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 02:20:13,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:13,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:20:13,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:20:13,657 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 02:20:13,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:20:13,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1073475250, now seen corresponding path program 1 times [2023-08-04 02:20:13,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064452119] [2023-08-04 02:20:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:13,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:20:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064452119] [2023-08-04 02:20:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064452119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:13,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:20:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301867955] [2023-08-04 02:20:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:20:13,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:13,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 02:20:13,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:13,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:13,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:13,927 INFO L124 PetriNetUnfolderBase]: 1760/2333 cut-off events. [2023-08-04 02:20:13,927 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-08-04 02:20:13,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 2333 events. 1760/2333 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8375 event pairs, 685 based on Foata normal form. 1/1402 useless extension candidates. Maximal degree in co-relation 1396. Up to 2189 conditions per place. [2023-08-04 02:20:13,942 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 21 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:20:13,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 140 flow [2023-08-04 02:20:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-04 02:20:13,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2023-08-04 02:20:13,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-04 02:20:13,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-04 02:20:13,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:13,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-04 02:20:13,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 02:20:13,949 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 02:20:13,949 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 02:20:13,950 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 91 flow. Second operand 3 states and 344 transitions. [2023-08-04 02:20:13,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 140 flow [2023-08-04 02:20:13,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 137 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:20:13,953 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 87 flow [2023-08-04 02:20:13,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=87, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-04 02:20:13,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 02:20:13,955 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 87 flow [2023-08-04 02:20:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 02:20:13,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:13,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:20:13,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:20:13,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:20:13,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2072510245, now seen corresponding path program 1 times [2023-08-04 02:20:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:13,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564015939] [2023-08-04 02:20:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:14,055 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 02:20:14,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564015939] [2023-08-04 02:20:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564015939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848449053] [2023-08-04 02:20:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:14,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:14,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:14,064 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 02:20:14,085 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 02:20:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:14,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:20:14,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:14,157 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 02:20:14,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:14,183 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 02:20:14,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848449053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:14,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:14,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:20:14,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966691201] [2023-08-04 02:20:14,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:14,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:14,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:14,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:14,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 02:20:14,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:14,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:14,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:14,336 INFO L124 PetriNetUnfolderBase]: 1432/1870 cut-off events. [2023-08-04 02:20:14,336 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-04 02:20:14,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3799 conditions, 1870 events. 1432/1870 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6215 event pairs, 357 based on Foata normal form. 3/1117 useless extension candidates. Maximal degree in co-relation 2803. Up to 1729 conditions per place. [2023-08-04 02:20:14,349 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 23 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-04 02:20:14,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 150 flow [2023-08-04 02:20:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-04 02:20:14,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48183760683760685 [2023-08-04 02:20:14,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-04 02:20:14,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-04 02:20:14,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:14,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-04 02:20:14,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states 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 02:20:14,355 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 02:20:14,355 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 02:20:14,356 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 87 flow. Second operand 4 states and 451 transitions. [2023-08-04 02:20:14,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 150 flow [2023-08-04 02:20:14,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:20:14,358 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 84 flow [2023-08-04 02:20:14,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-04 02:20:14,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-04 02:20:14,360 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 84 flow [2023-08-04 02:20:14,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 02:20:14,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:14,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:20:14,372 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 02:20:14,567 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,SelfDestructingSolverStorable3 [2023-08-04 02:20:14,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:20:14,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -625055817, now seen corresponding path program 1 times [2023-08-04 02:20:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:14,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64626598] [2023-08-04 02:20:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:20:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64626598] [2023-08-04 02:20:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64626598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224447894] [2023-08-04 02:20:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:14,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:14,639 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 02:20:14,642 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 02:20:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:14,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:20:14,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:20:14,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:20:14,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224447894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:14,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:20:14,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:20:14,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419866279] [2023-08-04 02:20:14,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:14,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:14,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:14,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 02:20:14,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:14,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:14,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:14,843 INFO L124 PetriNetUnfolderBase]: 1000/1330 cut-off events. [2023-08-04 02:20:14,843 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-04 02:20:14,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1330 events. 1000/1330 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4423 event pairs, 43 based on Foata normal form. 81/871 useless extension candidates. Maximal degree in co-relation 1017. Up to 558 conditions per place. [2023-08-04 02:20:14,846 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-04 02:20:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 198 flow [2023-08-04 02:20:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:20:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:20:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-04 02:20:14,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863247863247863 [2023-08-04 02:20:14,849 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-04 02:20:14,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-04 02:20:14,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:14,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-04 02:20:14,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 02:20:14,853 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 02:20:14,854 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 02:20:14,854 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 5 states and 569 transitions. [2023-08-04 02:20:14,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 198 flow [2023-08-04 02:20:14,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:20:14,855 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-04 02:20:14,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-04 02:20:14,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 02:20:14,856 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-04 02:20:14,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 02:20:14,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:20:14,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:20:14,865 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 02:20:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:15,061 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:20:15,062 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:20:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,154 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 02:20:15,154 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:20:15,156 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 02:20:15,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,160 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:20:15,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-04 02:20:15,217 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-04 02:20:15,217 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:20:15,220 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 02:20:15,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 02:20:17,111 INFO L134 LiptonReduction]: Checked pairs total: 8863 [2023-08-04 02:20:17,111 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 02:20:17,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:20:17,114 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;@1af17e99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:20:17,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:20:17,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:20:17,115 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 02:20:17,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:20:17,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:17,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 02:20:17,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:17,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 732296408, now seen corresponding path program 1 times [2023-08-04 02:20:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:17,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547690449] [2023-08-04 02:20:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:17,165 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 02:20:17,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547690449] [2023-08-04 02:20:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547690449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:17,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:17,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:20:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76171461] [2023-08-04 02:20:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:17,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:17,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:20:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:17,176 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 02:20:17,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:17,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:17,924 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-04 02:20:17,925 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-04 02:20:17,937 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 47493 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 02:20:17,986 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 35 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 02:20:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-04 02:20:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 02:20:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2023-08-04 02:20:17,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 02:20:17,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 02:20:17,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:17,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 02:20:17,990 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 02:20:17,992 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 02:20:17,996 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 02:20:17,997 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 360 transitions. [2023-08-04 02:20:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-04 02:20:17,999 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 02:20:18,000 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 02:20:18,001 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 02:20:18,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 02:20:18,003 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 02:20:18,003 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 02:20:18,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:18,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:20:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:20:18,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:18,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -177002803, now seen corresponding path program 1 times [2023-08-04 02:20:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:18,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131693779] [2023-08-04 02:20:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:18,056 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 02:20:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:18,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131693779] [2023-08-04 02:20:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131693779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:18,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564476636] [2023-08-04 02:20:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:18,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:18,062 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 02:20:18,081 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 02:20:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:18,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:20:18,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:18,193 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 02:20:18,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:20:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564476636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:18,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:20:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:20:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093673483] [2023-08-04 02:20:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:18,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:18,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:18,205 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 02:20:18,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:18,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:18,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:18,966 INFO L124 PetriNetUnfolderBase]: 8488/11014 cut-off events. [2023-08-04 02:20:18,967 INFO L125 PetriNetUnfolderBase]: For 859/859 co-relation queries the response was YES. [2023-08-04 02:20:18,975 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 49151 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 02:20:19,015 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 02:20:19,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 234 flow [2023-08-04 02:20:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 02:20:19,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2023-08-04 02:20:19,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 02:20:19,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 02:20:19,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:19,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 02:20:19,019 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 02:20:19,020 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 02:20:19,020 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 02:20:19,020 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 363 transitions. [2023-08-04 02:20:19,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 234 flow [2023-08-04 02:20:19,024 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 02:20:19,025 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 02:20:19,025 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 02:20:19,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 02:20:19,027 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 02:20:19,027 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 02:20:19,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:19,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:20:19,037 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 02:20:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:19,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:19,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -873309398, now seen corresponding path program 1 times [2023-08-04 02:20:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154328878] [2023-08-04 02:20:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:19,286 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 02:20:19,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:19,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154328878] [2023-08-04 02:20:19,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154328878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:19,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566029692] [2023-08-04 02:20:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:19,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:19,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:19,289 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 02:20:19,292 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 02:20:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:19,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:20:19,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:19,358 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 02:20:19,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:20:19,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566029692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:19,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:20:19,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:20:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74963719] [2023-08-04 02:20:19,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:19,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:19,374 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 02:20:19,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:19,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:19,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:19,952 INFO L124 PetriNetUnfolderBase]: 7283/9572 cut-off events. [2023-08-04 02:20:19,953 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-04 02:20:19,966 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 313. Compared 42879 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 02:20:20,001 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 02:20:20,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 274 flow [2023-08-04 02:20:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 02:20:20,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-04 02:20:20,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:20,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,009 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 02:20:20,010 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 02:20:20,010 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 02:20:20,011 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 369 transitions. [2023-08-04 02:20:20,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 274 flow [2023-08-04 02:20:20,012 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 02:20:20,013 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 02:20:20,014 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 02:20:20,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 02:20:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 02:20:20,015 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 02:20:20,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:20,015 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 02:20:20,022 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 02:20:20,221 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 02:20:20,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:20,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1744099365, now seen corresponding path program 1 times [2023-08-04 02:20:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029626212] [2023-08-04 02:20:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:20,274 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 02:20:20,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029626212] [2023-08-04 02:20:20,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029626212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:20,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831415503] [2023-08-04 02:20:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:20,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:20,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:20,278 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 02:20:20,296 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 02:20:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:20,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:20:20,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:20,345 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 02:20:20,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:20:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831415503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:20,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:20:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:20:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614362910] [2023-08-04 02:20:20,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:20,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:20,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:20,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:20,356 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 02:20:20,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:20,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:20,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:20,833 INFO L124 PetriNetUnfolderBase]: 7160/9501 cut-off events. [2023-08-04 02:20:20,833 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 02:20:20,849 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 281. Compared 42867 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 02:20:20,886 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 02:20:20,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 286 flow [2023-08-04 02:20:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 02:20:20,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-04 02:20:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:20,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 02:20:20,890 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 02:20:20,891 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 02:20:20,891 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 02:20:20,891 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 369 transitions. [2023-08-04 02:20:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 286 flow [2023-08-04 02:20:20,896 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 02:20:20,897 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 02:20:20,897 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 02:20:20,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 02:20:20,898 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 02:20:20,898 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 02:20:20,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:20,898 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 02:20:20,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:20:21,103 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 02:20:21,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:21,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 655517802, now seen corresponding path program 1 times [2023-08-04 02:20:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:21,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668834937] [2023-08-04 02:20:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:21,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:21,156 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 02:20:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668834937] [2023-08-04 02:20:21,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668834937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062279001] [2023-08-04 02:20:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:21,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:21,159 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 02:20:21,163 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 02:20:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:21,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:20:21,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:21,237 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 02:20:21,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:21,263 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 02:20:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062279001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:21,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:21,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:20:21,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250469429] [2023-08-04 02:20:21,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:21,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:21,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:21,282 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 02:20:21,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:21,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:21,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:21,710 INFO L124 PetriNetUnfolderBase]: 6453/8554 cut-off events. [2023-08-04 02:20:21,710 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-04 02:20:21,721 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 282. Compared 38257 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 02:20:21,754 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 02:20:21,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 264 flow [2023-08-04 02:20:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2023-08-04 02:20:21,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49893162393162394 [2023-08-04 02:20:21,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2023-08-04 02:20:21,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2023-08-04 02:20:21,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:21,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2023-08-04 02:20:21,758 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 02:20:21,759 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 02:20:21,759 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 02:20:21,759 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 467 transitions. [2023-08-04 02:20:21,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 264 flow [2023-08-04 02:20:21,785 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 02:20:21,786 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 02:20:21,786 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 02:20:21,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 02:20:21,787 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 02:20:21,787 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 02:20:21,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:21,787 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 02:20:21,796 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 02:20:21,996 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 02:20:21,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:21,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1172920996, now seen corresponding path program 1 times [2023-08-04 02:20:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937280717] [2023-08-04 02:20:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:22,059 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 02:20:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:22,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937280717] [2023-08-04 02:20:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937280717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196727993] [2023-08-04 02:20:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:22,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:22,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:22,062 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 02:20:22,064 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 02:20:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:22,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:20:22,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:22,140 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 02:20:22,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:22,156 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 02:20:22,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196727993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:22,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:22,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:20:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280565344] [2023-08-04 02:20:22,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:22,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:22,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:22,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:22,170 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 02:20:22,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:22,618 INFO L124 PetriNetUnfolderBase]: 6114/8098 cut-off events. [2023-08-04 02:20:22,618 INFO L125 PetriNetUnfolderBase]: For 795/795 co-relation queries the response was YES. [2023-08-04 02:20:22,632 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 36575 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 02:20:22,658 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 49 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 02:20:22,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 02:20:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 02:20:22,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074786324786325 [2023-08-04 02:20:22,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 02:20:22,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 02:20:22,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:22,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 02:20:22,661 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 02:20:22,663 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 02:20:22,663 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 02:20:22,663 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 475 transitions. [2023-08-04 02:20:22,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 02:20:22,678 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 02:20:22,679 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 02:20:22,679 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 02:20:22,680 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 02:20:22,680 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 02:20:22,680 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 02:20:22,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:22,680 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 02:20:22,692 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 02:20:22,888 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 02:20:22,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:22,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash 212393760, now seen corresponding path program 1 times [2023-08-04 02:20:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996823919] [2023-08-04 02:20:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:22,945 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 02:20:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996823919] [2023-08-04 02:20:22,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996823919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967555714] [2023-08-04 02:20:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:22,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:22,948 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 02:20:22,952 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 02:20:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:23,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:20:23,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:23,039 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 02:20:23,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:23,056 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 02:20:23,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967555714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:23,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:20:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259901058] [2023-08-04 02:20:23,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:23,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:23,070 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 02:20:23,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:23,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:23,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:23,453 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-04 02:20:23,453 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2023-08-04 02:20:23,459 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 22779 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 02:20:23,473 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 02:20:23,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 346 flow [2023-08-04 02:20:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 02:20:23,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-04 02:20:23,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 02:20:23,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 02:20:23,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:23,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 02:20:23,478 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 02:20:23,479 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 02:20:23,479 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 02:20:23,480 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 481 transitions. [2023-08-04 02:20:23,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 346 flow [2023-08-04 02:20:23,487 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 02:20:23,488 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 02:20:23,489 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 02:20:23,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 02:20:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 02:20:23,490 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 02:20:23,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:23,490 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 02:20:23,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:20:23,695 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 02:20:23,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:23,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1219568048, now seen corresponding path program 1 times [2023-08-04 02:20:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756173149] [2023-08-04 02:20:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:23,770 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 02:20:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:23,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756173149] [2023-08-04 02:20:23,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756173149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867445738] [2023-08-04 02:20:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:23,772 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 02:20:23,776 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 02:20:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:23,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:20:23,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:23,864 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 02:20:23,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:23,878 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 02:20:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867445738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:20:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142239922] [2023-08-04 02:20:23,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:23,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:23,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-04 02:20:23,894 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 02:20:23,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:23,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-04 02:20:23,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:24,307 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-04 02:20:24,308 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-04 02:20:24,319 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 22607 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 02:20:24,336 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-04 02:20:24,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 358 flow [2023-08-04 02:20:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-04 02:20:24,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-04 02:20:24,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-04 02:20:24,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-04 02:20:24,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:24,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-04 02:20:24,340 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 02:20:24,342 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 02:20:24,342 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 02:20:24,342 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 481 transitions. [2023-08-04 02:20:24,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 358 flow [2023-08-04 02:20:24,356 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 02:20:24,358 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 02:20:24,358 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 02:20:24,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 02:20:24,359 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 02:20:24,359 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 02:20:24,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:24,359 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 02:20:24,369 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 02:20:24,565 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 02:20:24,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:24,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash 400079850, now seen corresponding path program 1 times [2023-08-04 02:20:24,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:24,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828882287] [2023-08-04 02:20:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:24,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:25,039 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 02:20:25,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:25,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828882287] [2023-08-04 02:20:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828882287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:25,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 02:20:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597973045] [2023-08-04 02:20:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:20:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:20:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:20:25,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-04 02:20:25,057 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 02:20:25,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:25,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-04 02:20:25,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:25,515 INFO L124 PetriNetUnfolderBase]: 4907/6387 cut-off events. [2023-08-04 02:20:25,515 INFO L125 PetriNetUnfolderBase]: For 3430/3430 co-relation queries the response was YES. [2023-08-04 02:20:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14814 conditions, 6387 events. 4907/6387 cut-off events. For 3430/3430 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25199 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 02:20:25,543 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 65 selfloop transitions, 5 changer transitions 1/79 dead transitions. [2023-08-04 02:20:25,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 490 flow [2023-08-04 02:20:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:20:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:20:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 02:20:25,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484330484330484 [2023-08-04 02:20:25,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 02:20:25,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 02:20:25,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:25,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 02:20:25,546 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 02:20:25,547 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 02:20:25,548 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 02:20:25,548 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 190 flow. Second operand 3 states and 385 transitions. [2023-08-04 02:20:25,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 490 flow [2023-08-04 02:20:25,558 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 02:20:25,559 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 215 flow [2023-08-04 02:20:25,559 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 02:20:25,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 02:20:25,560 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 215 flow [2023-08-04 02:20:25,560 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 02:20:25,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:25,561 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 02:20:25,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 02:20:25,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:25,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1619203551, now seen corresponding path program 1 times [2023-08-04 02:20:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:25,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961076513] [2023-08-04 02:20:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:25,750 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 02:20:25,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961076513] [2023-08-04 02:20:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961076513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:25,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:25,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:20:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306401392] [2023-08-04 02:20:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:25,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 02:20:25,786 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 02:20:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 02:20:25,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:26,793 INFO L124 PetriNetUnfolderBase]: 8416/11703 cut-off events. [2023-08-04 02:20:26,793 INFO L125 PetriNetUnfolderBase]: For 8185/8185 co-relation queries the response was YES. [2023-08-04 02:20:26,804 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 02:20:26,831 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 133 selfloop transitions, 5 changer transitions 0/144 dead transitions. [2023-08-04 02:20:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 144 transitions, 944 flow [2023-08-04 02:20:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:20:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:20:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-04 02:20:26,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-04 02:20:26,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-04 02:20:26,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-04 02:20:26,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:26,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-04 02:20:26,835 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 02:20:26,836 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 02:20:26,836 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 02:20:26,836 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 215 flow. Second operand 5 states and 627 transitions. [2023-08-04 02:20:26,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 144 transitions, 944 flow [2023-08-04 02:20:26,865 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 02:20:26,867 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 249 flow [2023-08-04 02:20:26,867 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 02:20:26,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-08-04 02:20:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 249 flow [2023-08-04 02:20:26,868 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 02:20:26,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:26,868 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 02:20:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:20:26,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:26,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash -496917923, now seen corresponding path program 1 times [2023-08-04 02:20:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297156158] [2023-08-04 02:20:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:26,998 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 02:20:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297156158] [2023-08-04 02:20:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297156158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451355084] [2023-08-04 02:20:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:27,001 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 02:20:27,007 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 02:20:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:27,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:27,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:27,154 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 02:20:27,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:27,222 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 02:20:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451355084] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:20:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 02:20:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578754974] [2023-08-04 02:20:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:20:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:20:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:27,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 02:20:27,241 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 02:20:27,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:27,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 02:20:27,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:28,215 INFO L124 PetriNetUnfolderBase]: 10324/14244 cut-off events. [2023-08-04 02:20:28,216 INFO L125 PetriNetUnfolderBase]: For 16083/16672 co-relation queries the response was YES. [2023-08-04 02:20:28,256 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 02:20:28,304 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 101 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-04 02:20:28,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 782 flow [2023-08-04 02:20:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 02:20:28,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-04 02:20:28,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 02:20:28,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 02:20:28,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:28,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 02:20:28,308 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 02:20:28,309 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 02:20:28,310 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 02:20:28,310 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 249 flow. Second operand 4 states and 508 transitions. [2023-08-04 02:20:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 782 flow [2023-08-04 02:20:28,368 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 02:20:28,369 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 294 flow [2023-08-04 02:20:28,370 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 02:20:28,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2023-08-04 02:20:28,370 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 294 flow [2023-08-04 02:20:28,370 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 02:20:28,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:28,371 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 02:20:28,377 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 02:20:28,576 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,SelfDestructingSolverStorable15 [2023-08-04 02:20:28,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:28,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1885720227, now seen corresponding path program 1 times [2023-08-04 02:20:28,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:28,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531060462] [2023-08-04 02:20:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:28,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:28,704 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 02:20:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531060462] [2023-08-04 02:20:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531060462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202729014] [2023-08-04 02:20:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:28,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:28,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:28,710 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 02:20:28,730 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 02:20:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:28,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:28,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:28,823 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 02:20:28,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:28,856 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 02:20:28,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202729014] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:28,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:20:28,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 02:20:28,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779149070] [2023-08-04 02:20:28,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:28,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:20:28,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:28,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:20:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:28,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 02:20:28,878 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 02:20:28,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:28,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 02:20:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:30,114 INFO L124 PetriNetUnfolderBase]: 12669/17686 cut-off events. [2023-08-04 02:20:30,115 INFO L125 PetriNetUnfolderBase]: For 35334/38448 co-relation queries the response was YES. [2023-08-04 02:20:30,159 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 02:20:30,233 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 100 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-04 02:20:30,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 820 flow [2023-08-04 02:20:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-04 02:20:30,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-04 02:20:30,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-04 02:20:30,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-04 02:20:30,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:30,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-04 02:20:30,235 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 02:20:30,236 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 02:20:30,236 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 02:20:30,237 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 294 flow. Second operand 4 states and 498 transitions. [2023-08-04 02:20:30,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 820 flow [2023-08-04 02:20:30,294 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 02:20:30,295 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 338 flow [2023-08-04 02:20:30,295 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 02:20:30,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2023-08-04 02:20:30,295 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 338 flow [2023-08-04 02:20:30,296 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 02:20:30,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:30,296 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 02:20:30,301 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 02:20:30,496 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 02:20:30,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:30,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 153068567, now seen corresponding path program 2 times [2023-08-04 02:20:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606394579] [2023-08-04 02:20:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:30,611 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 02:20:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606394579] [2023-08-04 02:20:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606394579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275694208] [2023-08-04 02:20:30,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:20:30,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:30,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:30,614 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 02:20:30,616 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 02:20:30,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:20:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:20:30,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:30,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:30,726 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 02:20:30,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:30,755 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 02:20:30,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275694208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:30,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:30,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-04 02:20:30,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100897344] [2023-08-04 02:20:30,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:30,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 02:20:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 02:20:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 02:20:30,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:20:30,805 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 02:20:30,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:30,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:20:30,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:32,890 INFO L124 PetriNetUnfolderBase]: 19537/27731 cut-off events. [2023-08-04 02:20:32,890 INFO L125 PetriNetUnfolderBase]: For 65693/67800 co-relation queries the response was YES. [2023-08-04 02:20:32,982 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 02:20:33,081 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 210 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2023-08-04 02:20:33,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 236 transitions, 1793 flow [2023-08-04 02:20:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:20:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:20:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 883 transitions. [2023-08-04 02:20:33,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539072039072039 [2023-08-04 02:20:33,084 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 883 transitions. [2023-08-04 02:20:33,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 883 transitions. [2023-08-04 02:20:33,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:33,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 883 transitions. [2023-08-04 02:20:33,086 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 02:20:33,088 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 02:20:33,089 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 02:20:33,089 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 338 flow. Second operand 7 states and 883 transitions. [2023-08-04 02:20:33,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 236 transitions, 1793 flow [2023-08-04 02:20:33,348 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 02:20:33,350 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 502 flow [2023-08-04 02:20:33,350 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 02:20:33,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2023-08-04 02:20:33,351 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 502 flow [2023-08-04 02:20:33,351 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 02:20:33,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:33,351 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 02:20:33,356 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 02:20:33,552 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 02:20:33,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:33,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1127955446, now seen corresponding path program 1 times [2023-08-04 02:20:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:33,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518705146] [2023-08-04 02:20:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:33,645 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 02:20:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518705146] [2023-08-04 02:20:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518705146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044074297] [2023-08-04 02:20:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:33,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:33,648 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 02:20:33,651 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 02:20:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:33,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:33,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:33,751 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 02:20:33,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:33,779 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 02:20:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044074297] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:33,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:20:33,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 02:20:33,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566198231] [2023-08-04 02:20:33,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:33,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:20:33,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:20:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:33,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 02:20:33,802 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 02:20:33,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:33,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 02:20:33,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:35,861 INFO L124 PetriNetUnfolderBase]: 18581/26200 cut-off events. [2023-08-04 02:20:35,861 INFO L125 PetriNetUnfolderBase]: For 85443/89834 co-relation queries the response was YES. [2023-08-04 02:20:35,987 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 02:20:36,109 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2023-08-04 02:20:36,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1106 flow [2023-08-04 02:20:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 02:20:36,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-04 02:20:36,111 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 02:20:36,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 02:20:36,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:36,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 02:20:36,113 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 02:20:36,114 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 02:20:36,114 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 02:20:36,114 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 502 flow. Second operand 4 states and 508 transitions. [2023-08-04 02:20:36,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1106 flow [2023-08-04 02:20:36,329 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 02:20:36,330 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 558 flow [2023-08-04 02:20:36,330 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 02:20:36,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2023-08-04 02:20:36,330 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 558 flow [2023-08-04 02:20:36,331 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 02:20:36,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:36,331 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 02:20:36,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 02:20:36,531 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 02:20:36,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:36,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2034284833, now seen corresponding path program 2 times [2023-08-04 02:20:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:36,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996902109] [2023-08-04 02:20:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:36,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:36,642 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 02:20:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996902109] [2023-08-04 02:20:36,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996902109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:36,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701732489] [2023-08-04 02:20:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:20:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:36,644 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 02:20:36,649 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 02:20:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:20:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:20:36,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:36,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:36,761 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 02:20:36,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:36,795 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 02:20:36,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701732489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:20:36,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:20:36,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:20:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244036606] [2023-08-04 02:20:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:20:36,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:20:36,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:20:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:20:36,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:20:36,830 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 02:20:36,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:36,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:20:36,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:41,388 INFO L124 PetriNetUnfolderBase]: 34592/48855 cut-off events. [2023-08-04 02:20:41,388 INFO L125 PetriNetUnfolderBase]: For 246673/268688 co-relation queries the response was YES. [2023-08-04 02:20:41,571 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 02:20:41,741 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 174 selfloop transitions, 15 changer transitions 0/200 dead transitions. [2023-08-04 02:20:41,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 200 transitions, 1936 flow [2023-08-04 02:20:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:20:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:20:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-04 02:20:41,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523931623931624 [2023-08-04 02:20:41,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-04 02:20:41,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-04 02:20:41,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:41,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-04 02:20:41,745 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 02:20:41,746 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 02:20:41,747 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 02:20:41,747 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 558 flow. Second operand 5 states and 613 transitions. [2023-08-04 02:20:41,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 200 transitions, 1936 flow [2023-08-04 02:20:42,320 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 02:20:42,322 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 668 flow [2023-08-04 02:20:42,322 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 02:20:42,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2023-08-04 02:20:42,322 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 668 flow [2023-08-04 02:20:42,323 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 02:20:42,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:42,323 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 02:20:42,328 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 02:20:42,523 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 02:20:42,524 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:42,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1530141404, now seen corresponding path program 1 times [2023-08-04 02:20:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299237572] [2023-08-04 02:20:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:42,638 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 02:20:42,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299237572] [2023-08-04 02:20:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299237572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:42,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:20:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757772478] [2023-08-04 02:20:42,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:42,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:42,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:42,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 02:20:42,664 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 02:20:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 02:20:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:48,043 INFO L124 PetriNetUnfolderBase]: 40899/59182 cut-off events. [2023-08-04 02:20:48,043 INFO L125 PetriNetUnfolderBase]: For 313444/340202 co-relation queries the response was YES. [2023-08-04 02:20:48,309 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 02:20:48,569 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 189 selfloop transitions, 11 changer transitions 0/211 dead transitions. [2023-08-04 02:20:48,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 211 transitions, 2091 flow [2023-08-04 02:20:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:20:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:20:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-08-04 02:20:48,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264957264957265 [2023-08-04 02:20:48,718 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-08-04 02:20:48,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-08-04 02:20:48,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:48,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-08-04 02:20:48,720 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 02:20:48,721 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 02:20:48,721 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 02:20:48,722 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 668 flow. Second operand 5 states and 616 transitions. [2023-08-04 02:20:48,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 211 transitions, 2091 flow [2023-08-04 02:20:49,638 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 02:20:49,639 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 740 flow [2023-08-04 02:20:49,640 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 02:20:49,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2023-08-04 02:20:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 740 flow [2023-08-04 02:20:49,640 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 02:20:49,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:49,640 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 02:20:49,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 02:20:49,641 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:49,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 881397658, now seen corresponding path program 2 times [2023-08-04 02:20:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:49,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993012682] [2023-08-04 02:20:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:49,752 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 02:20:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993012682] [2023-08-04 02:20:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993012682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714234403] [2023-08-04 02:20:49,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:20:49,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:20:49,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:20:49,755 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 02:20:49,757 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 02:20:49,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:20:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:20:49,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:20:49,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:20:49,878 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 02:20:49,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:20:49,918 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 02:20:49,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714234403] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:20:49,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:20:49,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-04 02:20:49,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639671417] [2023-08-04 02:20:49,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:49,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:20:49,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:20:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:20:49,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-04 02:20:49,944 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 02:20:49,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:49,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-04 02:20:49,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:20:55,254 INFO L124 PetriNetUnfolderBase]: 39118/56758 cut-off events. [2023-08-04 02:20:55,255 INFO L125 PetriNetUnfolderBase]: For 323214/351122 co-relation queries the response was YES. [2023-08-04 02:20:55,500 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 02:20:55,721 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 131 selfloop transitions, 12 changer transitions 0/157 dead transitions. [2023-08-04 02:20:55,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 157 transitions, 1530 flow [2023-08-04 02:20:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:20:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:20:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-04 02:20:55,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-04 02:20:55,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-04 02:20:55,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-04 02:20:55,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:20:55,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-04 02:20:55,724 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 02:20:55,724 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 02:20:55,725 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 02:20:55,725 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 740 flow. Second operand 4 states and 498 transitions. [2023-08-04 02:20:55,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 157 transitions, 1530 flow [2023-08-04 02:20:56,787 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 02:20:56,789 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 775 flow [2023-08-04 02:20:56,789 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 02:20:56,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2023-08-04 02:20:56,789 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 775 flow [2023-08-04 02:20:56,790 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 02:20:56,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:20:56,790 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 02:20:56,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 02:20:56,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 02:20:56,991 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:20:56,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:20:56,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1366899405, now seen corresponding path program 3 times [2023-08-04 02:20:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:20:56,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900092049] [2023-08-04 02:20:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:20:56,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:20:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:20:57,098 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 02:20:57,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:20:57,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900092049] [2023-08-04 02:20:57,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900092049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:20:57,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:20:57,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:20:57,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997833031] [2023-08-04 02:20:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:20:57,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:20:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:20:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:20:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:20:57,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:20:57,125 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 02:20:57,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:20:57,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:20:57,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:02,903 INFO L124 PetriNetUnfolderBase]: 42413/61451 cut-off events. [2023-08-04 02:21:02,903 INFO L125 PetriNetUnfolderBase]: For 369633/397510 co-relation queries the response was YES. [2023-08-04 02:21:03,215 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 02:21:03,690 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 213 selfloop transitions, 18 changer transitions 0/242 dead transitions. [2023-08-04 02:21:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 242 transitions, 2508 flow [2023-08-04 02:21:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:21:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:21:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2023-08-04 02:21:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-04 02:21:03,692 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 728 transitions. [2023-08-04 02:21:03,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 728 transitions. [2023-08-04 02:21:03,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:03,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 728 transitions. [2023-08-04 02:21:03,693 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 02:21:03,694 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 02:21:03,694 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 02:21:03,695 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 775 flow. Second operand 6 states and 728 transitions. [2023-08-04 02:21:03,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 242 transitions, 2508 flow [2023-08-04 02:21:05,135 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 02:21:05,137 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 892 flow [2023-08-04 02:21:05,138 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 02:21:05,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2023-08-04 02:21:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 892 flow [2023-08-04 02:21:05,138 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 02:21:05,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:05,138 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 02:21:05,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 02:21:05,139 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:05,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1217923850, now seen corresponding path program 3 times [2023-08-04 02:21:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265647521] [2023-08-04 02:21:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:05,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:05,231 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 02:21:05,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:05,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265647521] [2023-08-04 02:21:05,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265647521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:21:05,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043636215] [2023-08-04 02:21:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:21:05,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:05,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:05,233 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 02:21:05,237 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 02:21:05,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 02:21:05,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:21:05,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:21:05,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:21:05,349 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 02:21:05,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:21:05,383 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 02:21:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043636215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:21:05,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:21:05,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:21:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200298831] [2023-08-04 02:21:05,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:21:05,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:21:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:21:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:21:05,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:21:05,418 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 02:21:05,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:05,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:21:05,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:11,040 INFO L124 PetriNetUnfolderBase]: 41420/59705 cut-off events. [2023-08-04 02:21:11,040 INFO L125 PetriNetUnfolderBase]: For 378356/405189 co-relation queries the response was YES. [2023-08-04 02:21:11,630 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 02:21:11,884 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 180 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2023-08-04 02:21:11,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 210 transitions, 2211 flow [2023-08-04 02:21:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:21:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:21:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-04 02:21:11,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-04 02:21:11,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-04 02:21:11,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-04 02:21:11,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:11,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-04 02:21:11,888 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 02:21:11,889 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 02:21:11,889 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 02:21:11,889 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 892 flow. Second operand 5 states and 612 transitions. [2023-08-04 02:21:11,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 210 transitions, 2211 flow [2023-08-04 02:21:13,966 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 02:21:13,969 INFO L231 Difference]: Finished difference. Result has 114 places, 97 transitions, 931 flow [2023-08-04 02:21:13,969 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 02:21:13,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-04 02:21:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 97 transitions, 931 flow [2023-08-04 02:21:13,970 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 02:21:13,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:13,970 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 02:21:13,976 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 02:21:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:14,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:14,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1414604053, now seen corresponding path program 4 times [2023-08-04 02:21:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:14,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279304815] [2023-08-04 02:21:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:14,382 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 02:21:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279304815] [2023-08-04 02:21:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279304815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:21:14,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:21:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:21:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546723181] [2023-08-04 02:21:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:21:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:21:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:21:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:21:14,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 02:21:14,424 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 02:21:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 02:21:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:19,858 INFO L124 PetriNetUnfolderBase]: 40552/58696 cut-off events. [2023-08-04 02:21:19,859 INFO L125 PetriNetUnfolderBase]: For 412740/439489 co-relation queries the response was YES. [2023-08-04 02:21:20,175 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 02:21:20,678 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 183 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2023-08-04 02:21:20,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 210 transitions, 2254 flow [2023-08-04 02:21:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:21:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:21:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-04 02:21:20,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-04 02:21:20,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-04 02:21:20,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-04 02:21:20,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:20,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-04 02:21:20,682 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 02:21:20,683 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 02:21:20,683 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 02:21:20,683 INFO L175 Difference]: Start difference. First operand has 114 places, 97 transitions, 931 flow. Second operand 5 states and 612 transitions. [2023-08-04 02:21:20,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 210 transitions, 2254 flow [2023-08-04 02:21:22,637 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 02:21:22,639 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 991 flow [2023-08-04 02:21:22,639 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 02:21:22,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2023-08-04 02:21:22,639 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 991 flow [2023-08-04 02:21:22,640 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 02:21:22,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:22,640 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 02:21:22,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 02:21:22,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:22,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash -941379180, now seen corresponding path program 1 times [2023-08-04 02:21:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:22,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596037215] [2023-08-04 02:21:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:22,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:22,726 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 02:21:22,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:22,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596037215] [2023-08-04 02:21:22,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596037215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:21:22,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:21:22,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:21:22,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663996935] [2023-08-04 02:21:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:21:22,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:21:22,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:21:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:21:22,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-04 02:21:22,758 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 02:21:22,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:22,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-04 02:21:22,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:29,094 INFO L124 PetriNetUnfolderBase]: 40888/60929 cut-off events. [2023-08-04 02:21:29,094 INFO L125 PetriNetUnfolderBase]: For 496365/524599 co-relation queries the response was YES. [2023-08-04 02:21:29,463 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 02:21:30,001 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 233 selfloop transitions, 12 changer transitions 5/262 dead transitions. [2023-08-04 02:21:30,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 262 transitions, 3032 flow [2023-08-04 02:21:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:21:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:21:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 631 transitions. [2023-08-04 02:21:30,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393162393162393 [2023-08-04 02:21:30,003 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 631 transitions. [2023-08-04 02:21:30,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 631 transitions. [2023-08-04 02:21:30,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:30,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 631 transitions. [2023-08-04 02:21:30,004 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 02:21:30,005 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 02:21:30,005 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 02:21:30,005 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 991 flow. Second operand 5 states and 631 transitions. [2023-08-04 02:21:30,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 262 transitions, 3032 flow [2023-08-04 02:21:32,019 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 02:21:32,022 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 1035 flow [2023-08-04 02:21:32,022 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 02:21:32,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2023-08-04 02:21:32,022 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 1035 flow [2023-08-04 02:21:32,023 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 02:21:32,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:32,023 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 02:21:32,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 02:21:32,023 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:32,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 729221200, now seen corresponding path program 2 times [2023-08-04 02:21:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703854723] [2023-08-04 02:21:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:32,109 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 02:21:32,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703854723] [2023-08-04 02:21:32,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703854723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:21:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477397635] [2023-08-04 02:21:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:21:32,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:32,114 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 02:21:32,120 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 02:21:32,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:21:32,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:21:32,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:21:32,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:21:32,268 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 02:21:32,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:21:32,314 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 02:21:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477397635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:21:32,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:21:32,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:21:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82493030] [2023-08-04 02:21:32,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:21:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:21:32,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:21:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:21:32,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:21:32,358 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 02:21:32,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:32,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:21:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:38,773 INFO L124 PetriNetUnfolderBase]: 40058/59604 cut-off events. [2023-08-04 02:21:38,774 INFO L125 PetriNetUnfolderBase]: For 487971/513978 co-relation queries the response was YES. [2023-08-04 02:21:39,141 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 02:21:39,688 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 225 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2023-08-04 02:21:39,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 2889 flow [2023-08-04 02:21:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:21:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:21:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-04 02:21:39,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-04 02:21:39,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-04 02:21:39,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-04 02:21:39,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:39,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-04 02:21:39,690 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 02:21:39,692 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 02:21:39,692 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 02:21:39,692 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 1035 flow. Second operand 5 states and 627 transitions. [2023-08-04 02:21:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 2889 flow [2023-08-04 02:21:41,523 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 02:21:41,525 INFO L231 Difference]: Finished difference. Result has 130 places, 103 transitions, 1089 flow [2023-08-04 02:21:41,525 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 02:21:41,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-04 02:21:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 103 transitions, 1089 flow [2023-08-04 02:21:41,526 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 02:21:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:41,526 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 02:21:41,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-04 02:21:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 02:21:41,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:41,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash -332395767, now seen corresponding path program 2 times [2023-08-04 02:21:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:41,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776016552] [2023-08-04 02:21:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:41,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:41,804 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 02:21:41,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776016552] [2023-08-04 02:21:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776016552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:21:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047596277] [2023-08-04 02:21:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:21:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:41,806 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 02:21:41,817 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 02:21:41,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:21:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:21:41,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:21:41,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:21:41,953 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 02:21:41,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:21:41,991 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 02:21:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047596277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:21:41,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:21:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 02:21:41,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333256877] [2023-08-04 02:21:41,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:21:41,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:21:41,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:21:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:21:42,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-04 02:21:42,041 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 02:21:42,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:42,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-04 02:21:42,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:48,334 INFO L124 PetriNetUnfolderBase]: 37426/54884 cut-off events. [2023-08-04 02:21:48,335 INFO L125 PetriNetUnfolderBase]: For 468120/492488 co-relation queries the response was YES. [2023-08-04 02:21:48,701 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 02:21:48,903 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 221 selfloop transitions, 21 changer transitions 0/254 dead transitions. [2023-08-04 02:21:48,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 254 transitions, 2956 flow [2023-08-04 02:21:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:21:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:21:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2023-08-04 02:21:48,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2023-08-04 02:21:48,904 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2023-08-04 02:21:48,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2023-08-04 02:21:48,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:21:48,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2023-08-04 02:21:48,905 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 02:21:48,906 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 02:21:48,907 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 02:21:48,907 INFO L175 Difference]: Start difference. First operand has 130 places, 103 transitions, 1089 flow. Second operand 5 states and 625 transitions. [2023-08-04 02:21:48,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 254 transitions, 2956 flow [2023-08-04 02:21:51,085 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 02:21:51,087 INFO L231 Difference]: Finished difference. Result has 133 places, 105 transitions, 1149 flow [2023-08-04 02:21:51,087 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 02:21:51,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2023-08-04 02:21:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 105 transitions, 1149 flow [2023-08-04 02:21:51,089 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 02:21:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:51,089 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 02:21:51,093 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 02:21:51,289 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 02:21:51,289 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:21:51,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1903361551, now seen corresponding path program 1 times [2023-08-04 02:21:51,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343680408] [2023-08-04 02:21:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:51,743 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 02:21:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343680408] [2023-08-04 02:21:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343680408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:21:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245008076] [2023-08-04 02:21:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:51,746 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 02:21:51,758 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 02:21:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:51,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 02:21:51,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:21:52,334 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 02:21:52,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:21:52,576 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 02:21:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245008076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:21:52,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:21:52,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 02:21:52,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327399780] [2023-08-04 02:21:52,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:21:52,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:21:52,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:21:52,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-04 02:21:52,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-04 02:21:52,800 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 02:21:52,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:21:52,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-04 02:21:52,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:21:56,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:21:58,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:22:01,206 WARN L539 Checker$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 02:22:03,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:22:04,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:22:15,535 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 02:22:17,680 INFO L124 PetriNetUnfolderBase]: 49576/74876 cut-off events. [2023-08-04 02:22:17,681 INFO L125 PetriNetUnfolderBase]: For 565792/598717 co-relation queries the response was YES. [2023-08-04 02:22:18,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386217 conditions, 74876 events. 49576/74876 cut-off events. For 565792/598717 co-relation queries the response was YES. Maximal size of possible extension queue 2666. Compared 597375 event pairs, 6898 based on Foata normal form. 13134/86729 useless extension candidates. Maximal degree in co-relation 377991. Up to 40063 conditions per place. [2023-08-04 02:22:18,425 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 223 selfloop transitions, 51 changer transitions 88/378 dead transitions. [2023-08-04 02:22:18,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 378 transitions, 3789 flow [2023-08-04 02:22:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 02:22:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 02:22:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1325 transitions. [2023-08-04 02:22:18,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147630147630148 [2023-08-04 02:22:18,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1325 transitions. [2023-08-04 02:22:18,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1325 transitions. [2023-08-04 02:22:18,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:18,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1325 transitions. [2023-08-04 02:22:18,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states 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 02:22:18,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 02:22:18,432 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 02:22:18,432 INFO L175 Difference]: Start difference. First operand has 133 places, 105 transitions, 1149 flow. Second operand 11 states and 1325 transitions. [2023-08-04 02:22:18,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 378 transitions, 3789 flow [2023-08-04 02:22:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 378 transitions, 3735 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-04 02:22:22,668 INFO L231 Difference]: Finished difference. Result has 148 places, 143 transitions, 1825 flow [2023-08-04 02:22:22,668 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=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1825, PETRI_PLACES=148, PETRI_TRANSITIONS=143} [2023-08-04 02:22:22,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2023-08-04 02:22:22,669 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 143 transitions, 1825 flow [2023-08-04 02:22:22,669 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 02:22:22,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:22,669 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 02:22:22,675 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 02:22:22,872 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 02:22:22,873 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:22:22,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2009106867, now seen corresponding path program 1 times [2023-08-04 02:22:22,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:22,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726183650] [2023-08-04 02:22:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:22:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726183650] [2023-08-04 02:22:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726183650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831816981] [2023-08-04 02:22:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:23,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:23,254 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 02:22:23,258 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 02:22:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:23,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-04 02:22:23,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:23,387 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 02:22:23,420 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 02:22:23,512 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 21 treesize of output 20 [2023-08-04 02:22:23,602 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 16 treesize of output 18 [2023-08-04 02:22:23,734 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 16 treesize of output 18 [2023-08-04 02:22:23,823 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 02:22:23,853 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 02:22:23,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:22:24,102 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_616 (Array Int Int))) (let ((.cse0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (<= .cse0 2147483647) (not (= .cse0 (+ c_thread2Thread1of2ForFork1_thidvar0 4294967296)))))) (forall ((v_ArrVal_616 (Array Int Int))) (let ((.cse1 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= c_thread2Thread1of2ForFork1_thidvar0 .cse1)) (< 2147483647 .cse1))))) is different from false [2023-08-04 02:22:24,297 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_616 (Array Int Int))) (let ((.cse0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (<= .cse0 2147483647) (not (= .cse0 (+ 4294967296 |c_#pthreadsForks|)))))) (forall ((v_ArrVal_616 (Array Int Int))) (let ((.cse1 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse1 |c_#pthreadsForks|)) (< 2147483647 .cse1))))) is different from false [2023-08-04 02:22:24,569 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4) 4))) (and (forall ((v_ArrVal_616 (Array Int Int)) (v_ArrVal_614 Int)) (let ((.cse0 (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store .cse1 .cse2 v_ArrVal_614)) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse0 (+ 4294967297 |c_#pthreadsForks|))) (<= .cse0 2147483647)))) (forall ((v_ArrVal_616 (Array Int Int)) (v_ArrVal_614 Int)) (let ((.cse3 (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store .cse1 .cse2 v_ArrVal_614)) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~#t1~0#1.base|) |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (< 2147483647 .cse3) (not (= .cse3 (+ |c_#pthreadsForks| 1)))))))) is different from false [2023-08-04 02:22:24,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:22:24,627 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 68 treesize of output 53 [2023-08-04 02:22:24,638 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:22:24,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 58 [2023-08-04 02:22:24,644 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 40 treesize of output 36 [2023-08-04 02:22:24,693 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-04 02:22:24,693 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 54 treesize of output 1 [2023-08-04 02:22:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 10 not checked. [2023-08-04 02:22:24,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831816981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:22:24,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:22:24,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 10] total 26 [2023-08-04 02:22:24,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174348235] [2023-08-04 02:22:24,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:22:24,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-04 02:22:24,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-04 02:22:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=12, NotChecked=138, Total=702 [2023-08-04 02:22:24,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 234 [2023-08-04 02:22:24,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 143 transitions, 1825 flow. Second operand has 27 states, 27 states have (on average 64.33333333333333) internal successors, (1737), 27 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states 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 02:22:24,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:24,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 234 [2023-08-04 02:22:24,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:42,693 INFO L124 PetriNetUnfolderBase]: 60839/89317 cut-off events. [2023-08-04 02:22:42,694 INFO L125 PetriNetUnfolderBase]: For 811468/842868 co-relation queries the response was YES. [2023-08-04 02:22:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491590 conditions, 89317 events. 60839/89317 cut-off events. For 811468/842868 co-relation queries the response was YES. Maximal size of possible extension queue 2377. Compared 663407 event pairs, 6539 based on Foata normal form. 17817/106185 useless extension candidates. Maximal degree in co-relation 491415. Up to 47007 conditions per place. [2023-08-04 02:22:43,789 INFO L140 encePairwiseOnDemand]: 214/234 looper letters, 493 selfloop transitions, 348 changer transitions 32/890 dead transitions. [2023-08-04 02:22:43,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 890 transitions, 12494 flow [2023-08-04 02:22:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-04 02:22:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-04 02:22:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3143 transitions. [2023-08-04 02:22:43,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29848053181386514 [2023-08-04 02:22:43,793 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3143 transitions. [2023-08-04 02:22:43,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3143 transitions. [2023-08-04 02:22:43,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:43,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3143 transitions. [2023-08-04 02:22:43,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 69.84444444444445) internal successors, (3143), 45 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states 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 02:22:43,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 234.0) internal successors, (10764), 46 states have internal predecessors, (10764), 0 states have call successors, (0), 0 states 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 02:22:43,804 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 234.0) internal successors, (10764), 46 states have internal predecessors, (10764), 0 states have call successors, (0), 0 states 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 02:22:43,804 INFO L175 Difference]: Start difference. First operand has 148 places, 143 transitions, 1825 flow. Second operand 45 states and 3143 transitions. [2023-08-04 02:22:43,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 890 transitions, 12494 flow [2023-08-04 02:22:51,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 890 transitions, 12015 flow, removed 151 selfloop flow, removed 3 redundant places. [2023-08-04 02:22:51,814 INFO L231 Difference]: Finished difference. Result has 215 places, 522 transitions, 8456 flow [2023-08-04 02:22:51,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=8456, PETRI_PLACES=215, PETRI_TRANSITIONS=522} [2023-08-04 02:22:51,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2023-08-04 02:22:51,815 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 522 transitions, 8456 flow [2023-08-04 02:22:51,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 64.33333333333333) internal successors, (1737), 27 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states 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 02:22:51,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:51,816 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 02:22:51,821 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 02:22:52,018 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 02:22:52,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:22:52,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -619382347, now seen corresponding path program 1 times [2023-08-04 02:22:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381693788] [2023-08-04 02:22:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:52,637 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 02:22:52,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:52,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381693788] [2023-08-04 02:22:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381693788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991601465] [2023-08-04 02:22:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:52,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:52,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:52,642 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 02:22:52,644 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 02:22:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:53,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-04 02:22:53,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:53,059 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 02:22:53,136 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 02:22:53,212 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 16 treesize of output 18 [2023-08-04 02:22:53,297 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 16 treesize of output 18 [2023-08-04 02:22:53,424 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 02:22:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 02:22:53,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:22:54,083 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_648 (Array Int Int))) (let ((.cse0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (not (= .cse0 (+ 4294967296 |c_#pthreadsForks|))) (<= .cse0 2147483647)))) (forall ((v_ArrVal_648 (Array Int Int))) (let ((.cse2 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_648) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (< 2147483647 .cse2) (not (= .cse2 |c_#pthreadsForks|))))))) is different from false [2023-08-04 02:22:54,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:22:54,196 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 1 case distinctions, treesize of input 56 treesize of output 44 [2023-08-04 02:22:54,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:22:54,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 82 treesize of output 62 [2023-08-04 02:22:54,215 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 44 treesize of output 36 [2023-08-04 02:22:54,263 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-04 02:22:54,264 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 1 case distinctions, treesize of input 52 treesize of output 1 [2023-08-04 02:22:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 7 not checked. [2023-08-04 02:22:54,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991601465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:22:54,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:22:54,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-04 02:22:54,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634768505] [2023-08-04 02:22:54,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:22:54,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-04 02:22:54,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-04 02:22:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=670, Unknown=10, NotChecked=52, Total=812 [2023-08-04 02:22:54,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 234 [2023-08-04 02:22:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 522 transitions, 8456 flow. Second operand has 29 states, 29 states have (on average 74.3103448275862) internal successors, (2155), 29 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states 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 02:22:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 234 [2023-08-04 02:22:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:23:09,317 INFO L124 PetriNetUnfolderBase]: 50187/72309 cut-off events. [2023-08-04 02:23:09,318 INFO L125 PetriNetUnfolderBase]: For 1231799/1270645 co-relation queries the response was YES. [2023-08-04 02:23:10,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479619 conditions, 72309 events. 50187/72309 cut-off events. For 1231799/1270645 co-relation queries the response was YES. Maximal size of possible extension queue 2366. Compared 513356 event pairs, 404 based on Foata normal form. 21395/92716 useless extension candidates. Maximal degree in co-relation 470889. Up to 24891 conditions per place. [2023-08-04 02:23:10,475 INFO L140 encePairwiseOnDemand]: 215/234 looper letters, 1248 selfloop transitions, 47 changer transitions 10/1336 dead transitions. [2023-08-04 02:23:10,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1336 transitions, 23630 flow [2023-08-04 02:23:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 02:23:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 02:23:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1495 transitions. [2023-08-04 02:23:10,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362573099415205 [2023-08-04 02:23:10,478 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1495 transitions. [2023-08-04 02:23:10,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1495 transitions. [2023-08-04 02:23:10,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:23:10,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1495 transitions. [2023-08-04 02:23:10,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.6842105263158) internal successors, (1495), 19 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states 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 02:23:10,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 02:23:10,483 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 02:23:10,483 INFO L175 Difference]: Start difference. First operand has 215 places, 522 transitions, 8456 flow. Second operand 19 states and 1495 transitions. [2023-08-04 02:23:10,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1336 transitions, 23630 flow [2023-08-04 02:23:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1336 transitions, 22770 flow, removed 400 selfloop flow, removed 11 redundant places. [2023-08-04 02:23:18,826 INFO L231 Difference]: Finished difference. Result has 224 places, 523 transitions, 8090 flow [2023-08-04 02:23:18,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8090, PETRI_PLACES=224, PETRI_TRANSITIONS=523} [2023-08-04 02:23:18,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2023-08-04 02:23:18,826 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 523 transitions, 8090 flow [2023-08-04 02:23:18,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 74.3103448275862) internal successors, (2155), 29 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states 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 02:23:18,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:23:18,827 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 02:23:18,832 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 02:23:19,027 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 02:23:19,028 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:23:19,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:23:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -705668069, now seen corresponding path program 1 times [2023-08-04 02:23:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:23:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169285399] [2023-08-04 02:23:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:23:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:23:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:23:19,465 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 02:23:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:23:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169285399] [2023-08-04 02:23:19,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169285399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:23:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815414494] [2023-08-04 02:23:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:23:19,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:23:19,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:23:19,470 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 02:23:19,472 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 02:23:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:23:19,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-04 02:23:19,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:23:20,007 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 02:23:20,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:23:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:23:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815414494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:23:20,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:23:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2023-08-04 02:23:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342778826] [2023-08-04 02:23:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:23:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:23:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:23:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:23:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:23:20,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 234 [2023-08-04 02:23:20,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 523 transitions, 8090 flow. Second operand has 15 states, 15 states have (on average 101.0) internal successors, (1515), 15 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:23:20,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:23:20,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 234 [2023-08-04 02:23:20,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:23:48,638 INFO L124 PetriNetUnfolderBase]: 95237/140901 cut-off events. [2023-08-04 02:23:48,638 INFO L125 PetriNetUnfolderBase]: For 2425158/2448745 co-relation queries the response was YES. [2023-08-04 02:23:50,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991719 conditions, 140901 events. 95237/140901 cut-off events. For 2425158/2448745 co-relation queries the response was YES. Maximal size of possible extension queue 4296. Compared 1120406 event pairs, 15290 based on Foata normal form. 16002/155222 useless extension candidates. Maximal degree in co-relation 969931. Up to 68509 conditions per place. [2023-08-04 02:23:51,110 INFO L140 encePairwiseOnDemand]: 225/234 looper letters, 552 selfloop transitions, 925 changer transitions 41/1543 dead transitions. [2023-08-04 02:23:51,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1543 transitions, 23082 flow [2023-08-04 02:23:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 02:23:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 02:23:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1987 transitions. [2023-08-04 02:23:51,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49949723479135244 [2023-08-04 02:23:51,113 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1987 transitions. [2023-08-04 02:23:51,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1987 transitions. [2023-08-04 02:23:51,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:23:51,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1987 transitions. [2023-08-04 02:23:51,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 116.88235294117646) internal successors, (1987), 17 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states 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 02:23:51,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 234.0) internal successors, (4212), 18 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 02:23:51,120 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 234.0) internal successors, (4212), 18 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 02:23:51,120 INFO L175 Difference]: Start difference. First operand has 224 places, 523 transitions, 8090 flow. Second operand 17 states and 1987 transitions. [2023-08-04 02:23:51,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1543 transitions, 23082 flow [2023-08-04 02:24:32,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1543 transitions, 22140 flow, removed 154 selfloop flow, removed 26 redundant places. [2023-08-04 02:24:32,655 INFO L231 Difference]: Finished difference. Result has 220 places, 1163 transitions, 19224 flow [2023-08-04 02:24:32,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19224, PETRI_PLACES=220, PETRI_TRANSITIONS=1163} [2023-08-04 02:24:32,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2023-08-04 02:24:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 1163 transitions, 19224 flow [2023-08-04 02:24:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 101.0) internal successors, (1515), 15 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:24:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:24:32,657 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 02:24:32,662 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 02:24:32,857 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 02:24:32,857 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:24:32,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:24:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -74627503, now seen corresponding path program 1 times [2023-08-04 02:24:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:24:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227210794] [2023-08-04 02:24:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:24:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:24:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:24:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:24:33,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:24:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227210794] [2023-08-04 02:24:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227210794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:24:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211290343] [2023-08-04 02:24:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:24:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:24:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:24:33,169 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 02:24:33,172 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 02:24:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:24:33,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-04 02:24:33,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:24:33,284 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 02:24:33,345 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 02:24:33,396 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 16 treesize of output 18 [2023-08-04 02:24:33,467 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 16 treesize of output 18 [2023-08-04 02:24:33,625 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 02:24:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 02:24:33,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:24:34,149 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_706 (Array Int Int))) (let ((.cse0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (<= .cse0 2147483647) (not (= .cse0 (+ 4294967297 |c_#pthreadsForks|)))))) (forall ((v_ArrVal_706 (Array Int Int))) (let ((.cse2 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (not (= .cse2 (+ |c_#pthreadsForks| 1))) (< 2147483647 .cse2)))))) is different from false [2023-08-04 02:24:34,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:24:34,222 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 1 case distinctions, treesize of input 56 treesize of output 44 [2023-08-04 02:24:34,233 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 02:24:34,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 82 treesize of output 62 [2023-08-04 02:24:34,238 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 44 treesize of output 36 [2023-08-04 02:24:34,272 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-04 02:24:34,272 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 1 case distinctions, treesize of input 52 treesize of output 1 [2023-08-04 02:24:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 7 not checked. [2023-08-04 02:24:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211290343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:24:34,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:24:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2023-08-04 02:24:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076397681] [2023-08-04 02:24:34,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:24:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 02:24:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:24:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 02:24:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=4, NotChecked=44, Total=600 [2023-08-04 02:24:34,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 234 [2023-08-04 02:24:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 1163 transitions, 19224 flow. Second operand has 25 states, 25 states have (on average 69.92) internal successors, (1748), 25 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states 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 02:24:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:24:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 234 [2023-08-04 02:24:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:24:58,801 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_706 (Array Int Int))) (let ((.cse0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (< 2147483647 .cse0) (not (= .cse0 |c_#pthreadsForks|))))) (= c_~x_1~0 (* 4294967296 (div c_~x_1~0 4294967296))) (= c_thread2Thread2of2ForFork1_thidvar0 (+ 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) 4))) (forall ((v_ArrVal_706 (Array Int Int))) (let ((.cse2 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~#t1~0#1.base|) .cse1) 4294967296))) (or (<= .cse2 2147483647) (not (= .cse2 (+ 4294967296 |c_#pthreadsForks|)))))) (= (+ 2 |c_ULTIMATE.start_main_#t~mem12#1|) c_thread2Thread2of2ForFork1_thidvar0) (= c_~x_2~0 0) (= |c_ULTIMATE.start_main_~#t1~0#1.offset| 0) (= |c_ULTIMATE.start_main_~asdf~2#1| 1))) is different from false [2023-08-04 02:25:18,665 INFO L124 PetriNetUnfolderBase]: 106253/154552 cut-off events. [2023-08-04 02:25:18,665 INFO L125 PetriNetUnfolderBase]: For 3685193/3735807 co-relation queries the response was YES. [2023-08-04 02:25:20,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127615 conditions, 154552 events. 106253/154552 cut-off events. For 3685193/3735807 co-relation queries the response was YES. Maximal size of possible extension queue 4417. Compared 1183473 event pairs, 2298 based on Foata normal form. 33295/187222 useless extension candidates. Maximal degree in co-relation 1099210. Up to 54111 conditions per place. [2023-08-04 02:25:21,601 INFO L140 encePairwiseOnDemand]: 211/234 looper letters, 2507 selfloop transitions, 845 changer transitions 30/3400 dead transitions. [2023-08-04 02:25:21,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 3400 transitions, 64382 flow [2023-08-04 02:25:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-04 02:25:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-04 02:25:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4508 transitions. [2023-08-04 02:25:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210826210826211 [2023-08-04 02:25:21,608 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4508 transitions. [2023-08-04 02:25:21,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4508 transitions. [2023-08-04 02:25:21,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:25:21,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4508 transitions. [2023-08-04 02:25:21,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 75.13333333333334) internal successors, (4508), 60 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states 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 02:25:21,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 234.0) internal successors, (14274), 61 states have internal predecessors, (14274), 0 states have call successors, (0), 0 states 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 02:25:21,625 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 234.0) internal successors, (14274), 61 states have internal predecessors, (14274), 0 states have call successors, (0), 0 states 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 02:25:21,625 INFO L175 Difference]: Start difference. First operand has 220 places, 1163 transitions, 19224 flow. Second operand 60 states and 4508 transitions. [2023-08-04 02:25:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 3400 transitions, 64382 flow [2023-08-04 02:26:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 3400 transitions, 57490 flow, removed 3164 selfloop flow, removed 8 redundant places. [2023-08-04 02:26:28,693 INFO L231 Difference]: Finished difference. Result has 285 places, 1792 transitions, 29869 flow [2023-08-04 02:26:28,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=17262, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=29869, PETRI_PLACES=285, PETRI_TRANSITIONS=1792} [2023-08-04 02:26:28,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2023-08-04 02:26:28,695 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1792 transitions, 29869 flow [2023-08-04 02:26:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.92) internal successors, (1748), 25 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states 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 02:26:28,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:28,696 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 02:26:28,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-04 02:26:28,897 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 02:26:28,897 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:26:28,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1363286485, now seen corresponding path program 2 times [2023-08-04 02:26:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:28,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596144711] [2023-08-04 02:26:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:26:29,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596144711] [2023-08-04 02:26:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596144711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199849893] [2023-08-04 02:26:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:26:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:29,314 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 02:26:29,317 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 02:26:29,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:26:29,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:26:29,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 02:26:29,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:26:30,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:26:30,462 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 02:26:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199849893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:26:30,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:26:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 02:26:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62764424] [2023-08-04 02:26:30,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:26:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:26:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:26:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-04 02:26:30,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-04 02:26:30,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1792 transitions, 29869 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 02:26:30,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:30,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-04 02:26:30,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:35,603 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 02:26:39,387 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 02:27:33,084 INFO L124 PetriNetUnfolderBase]: 113722/172168 cut-off events. [2023-08-04 02:27:33,084 INFO L125 PetriNetUnfolderBase]: For 3311040/3371811 co-relation queries the response was YES. [2023-08-04 02:27:35,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213752 conditions, 172168 events. 113722/172168 cut-off events. For 3311040/3371811 co-relation queries the response was YES. Maximal size of possible extension queue 5257. Compared 1451765 event pairs, 34037 based on Foata normal form. 31018/200338 useless extension candidates. Maximal degree in co-relation 1179584. Up to 130171 conditions per place. [2023-08-04 02:27:36,662 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 1448 selfloop transitions, 403 changer transitions 291/2216 dead transitions. [2023-08-04 02:27:36,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 2216 transitions, 40953 flow [2023-08-04 02:27:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:27:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:27:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-08-04 02:27:36,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085470085470085 [2023-08-04 02:27:36,664 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-08-04 02:27:36,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-08-04 02:27:36,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:36,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-08-04 02:27:36,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 02:27:36,667 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 02:27:36,667 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 02:27:36,668 INFO L175 Difference]: Start difference. First operand has 285 places, 1792 transitions, 29869 flow. Second operand 8 states and 952 transitions. [2023-08-04 02:27:36,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 2216 transitions, 40953 flow [2023-08-04 02:28:58,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 2216 transitions, 39298 flow, removed 678 selfloop flow, removed 12 redundant places. [2023-08-04 02:28:58,097 INFO L231 Difference]: Finished difference. Result has 285 places, 1864 transitions, 31416 flow [2023-08-04 02:28:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=28389, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=31416, PETRI_PLACES=285, PETRI_TRANSITIONS=1864} [2023-08-04 02:28:58,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2023-08-04 02:28:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1864 transitions, 31416 flow [2023-08-04 02:28:58,099 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 02:28:58,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:58,100 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 02:28:58,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-04 02:28:58,309 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 02:28:58,309 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:28:58,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -252861161, now seen corresponding path program 2 times [2023-08-04 02:28:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:58,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053041535] [2023-08-04 02:28:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:28:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053041535] [2023-08-04 02:28:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053041535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133379887] [2023-08-04 02:28:58,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:28:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:58,711 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 02:28:58,713 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 02:28:58,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:28:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:28:58,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 02:28:58,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:28:59,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:29:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:29:01,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133379887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:29:01,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:29:01,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-04 02:29:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649380760] [2023-08-04 02:29:01,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:29:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:29:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:29:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:29:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=106, Unknown=1, NotChecked=0, Total=156 [2023-08-04 02:29:03,536 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 02:29:05,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:29:07,587 WARN L539 Checker$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 02:29:09,666 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 02:29:09,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 234 [2023-08-04 02:29:09,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1864 transitions, 31416 flow. Second operand has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 02:29:09,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:29:09,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 234 [2023-08-04 02:29:09,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:05,083 INFO L124 PetriNetUnfolderBase]: 106451/160123 cut-off events. [2023-08-04 02:30:05,083 INFO L125 PetriNetUnfolderBase]: For 3250951/3297947 co-relation queries the response was YES. [2023-08-04 02:30:07,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173675 conditions, 160123 events. 106451/160123 cut-off events. For 3250951/3297947 co-relation queries the response was YES. Maximal size of possible extension queue 4850. Compared 1314560 event pairs, 30154 based on Foata normal form. 28432/186903 useless extension candidates. Maximal degree in co-relation 1173172. Up to 95818 conditions per place. [2023-08-04 02:30:08,726 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 1118 selfloop transitions, 1086 changer transitions 20/2272 dead transitions. [2023-08-04 02:30:08,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 2272 transitions, 41158 flow [2023-08-04 02:30:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 02:30:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 02:30:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1270 transitions. [2023-08-04 02:30:08,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933954933954934 [2023-08-04 02:30:08,728 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1270 transitions. [2023-08-04 02:30:08,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1270 transitions. [2023-08-04 02:30:08,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:08,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1270 transitions. [2023-08-04 02:30:08,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.45454545454545) internal successors, (1270), 11 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 02:30:08,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 02:30:08,732 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 02:30:08,732 INFO L175 Difference]: Start difference. First operand has 285 places, 1864 transitions, 31416 flow. Second operand 11 states and 1270 transitions. [2023-08-04 02:30:08,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 2272 transitions, 41158 flow [2023-08-04 02:31:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2272 transitions, 40237 flow, removed 261 selfloop flow, removed 2 redundant places. [2023-08-04 02:31:02,335 INFO L231 Difference]: Finished difference. Result has 294 places, 2042 transitions, 36852 flow [2023-08-04 02:31:02,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=30677, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=950, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=36852, PETRI_PLACES=294, PETRI_TRANSITIONS=2042} [2023-08-04 02:31:02,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2023-08-04 02:31:02,337 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 2042 transitions, 36852 flow [2023-08-04 02:31:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 02:31:02,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:02,338 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 02:31:02,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 02:31:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-04 02:31:02,538 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:02,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 473537375, now seen corresponding path program 3 times [2023-08-04 02:31:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873887891] [2023-08-04 02:31:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:31:02,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873887891] [2023-08-04 02:31:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873887891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:31:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939890920] [2023-08-04 02:31:02,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:31:02,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:02,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:31:02,918 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:31:02,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-04 02:31:03,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 02:31:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:31:03,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-04 02:31:03,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:31:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:31:03,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:31:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:31:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939890920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:31:05,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:31:05,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 6] total 17 [2023-08-04 02:31:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331586520] [2023-08-04 02:31:05,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:31:05,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 02:31:05,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 02:31:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=248, Unknown=1, NotChecked=0, Total=342 [2023-08-04 02:31:08,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:31:10,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:31:12,630 WARN L539 Checker$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 02:31:13,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 234 [2023-08-04 02:31:13,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 2042 transitions, 36852 flow. Second operand has 19 states, 19 states have (on average 87.52631578947368) internal successors, (1663), 19 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states 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 02:31:13,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:13,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 234 [2023-08-04 02:31:13,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:27,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:31:32,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:31:35,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-04 02:31:40,067 WARN L539 Checker$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 02:31:42,887 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] Received shutdown request... [2023-08-04 02:32:24,698 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 02:32:24,698 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 02:32:25,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-04 02:32:25,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 02:32:26,811 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:32:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-04 02:32:26,811 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 02:32:26,812 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:32:26,812 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (2/2) [2023-08-04 02:32:26,813 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:32:26,813 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:32:26,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:32:26 BasicIcfg [2023-08-04 02:32:26,816 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:32:26,816 INFO L158 Benchmark]: Toolchain (without parser) took 740218.49ms. Allocated memory was 486.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 440.2MB in the beginning and 12.7GB in the end (delta: -12.2GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. [2023-08-04 02:32:26,817 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 341.8MB. Free memory was 294.4MB in the beginning and 294.4MB in the end (delta: 58.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:32:26,817 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.43ms. Allocated memory is still 486.5MB. Free memory was 440.2MB in the beginning and 429.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:32:26,817 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.07ms. Allocated memory is still 486.5MB. Free memory was 429.2MB in the beginning and 427.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:32:26,817 INFO L158 Benchmark]: Boogie Preprocessor took 23.25ms. Allocated memory is still 486.5MB. Free memory was 427.6MB in the beginning and 426.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:32:26,818 INFO L158 Benchmark]: RCFGBuilder took 362.95ms. Allocated memory is still 486.5MB. Free memory was 426.2MB in the beginning and 412.9MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 02:32:26,818 INFO L158 Benchmark]: TraceAbstraction took 739553.13ms. Allocated memory was 486.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 412.3MB in the beginning and 12.7GB in the end (delta: -12.2GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. [2023-08-04 02:32:26,819 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 341.8MB. Free memory was 294.4MB in the beginning and 294.4MB in the end (delta: 58.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 241.43ms. Allocated memory is still 486.5MB. Free memory was 440.2MB in the beginning and 429.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.07ms. Allocated memory is still 486.5MB. Free memory was 429.2MB in the beginning and 427.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.25ms. Allocated memory is still 486.5MB. Free memory was 427.6MB in the beginning and 426.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 362.95ms. Allocated memory is still 486.5MB. Free memory was 426.2MB in the beginning and 412.9MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 739553.13ms. Allocated memory was 486.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 412.3MB in the beginning and 12.7GB in the end (delta: -12.2GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 99 PlacesBefore, 29 PlacesAfterwards, 107 TransitionsBefore, 30 TransitionsAfterwards, 2400 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 7 ChoiceCompositions, 87 TotalNumberOfCompositions, 2818 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2720, independent: 2712, independent conditional: 0, independent unconditional: 2712, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1297, independent: 1291, independent conditional: 0, independent unconditional: 1291, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2720, independent: 1421, independent conditional: 0, independent unconditional: 1421, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 1297, unknown conditional: 0, unknown unconditional: 1297] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 121 PlacesBefore, 41 PlacesAfterwards, 133 TransitionsBefore, 44 TransitionsAfterwards, 6000 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 9 ChoiceCompositions, 101 TotalNumberOfCompositions, 8863 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8537, independent: 8525, independent conditional: 0, independent unconditional: 8525, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3200, independent: 3190, independent conditional: 0, independent unconditional: 3190, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8537, independent: 5335, independent conditional: 0, independent unconditional: 5335, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 3200, unknown conditional: 0, unknown unconditional: 3200] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 214, Positive conditional cache size: 0, Positive unconditional cache size: 214, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 121 PlacesBefore, 41 PlacesAfterwards, 133 TransitionsBefore, 44 TransitionsAfterwards, 6000 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 9 ChoiceCompositions, 101 TotalNumberOfCompositions, 8863 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8538, independent: 8526, independent conditional: 0, independent unconditional: 8526, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3194, independent: 3184, independent conditional: 0, independent unconditional: 3184, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8538, independent: 5342, independent conditional: 0, independent unconditional: 5342, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 3194, unknown conditional: 0, unknown unconditional: 3194] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 214, Positive conditional cache size: 0, Positive unconditional cache size: 214, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 131 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.3s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 154 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 272 IncrementalHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 0 mSDtfsCounter, 272 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 309 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 131 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 731.7s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 703.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 71 mSolverCounterUnknown, 5043 SdHoareTripleChecker+Valid, 70.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4575 mSDsluCounter, 2380 SdHoareTripleChecker+Invalid, 67.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2092 IncrementalHoareTripleChecker+Unchecked, 2133 mSDsCounter, 323 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18114 IncrementalHoareTripleChecker+Invalid, 20600 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 323 mSolverCounterUnsat, 247 mSDtfsCounter, 18114 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2154 GetRequests, 1743 SyntacticMatches, 47 SemanticMatches, 364 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 31.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36852occurred in iteration=30, InterpolantAutomatonStates: 271, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 2194 NumberOfCodeBlocks, 2194 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 3034 ConstructedInterpolants, 47 QuantifiedInterpolants, 24782 SizeOfPredicates, 95 NumberOfNonLiveVariables, 4035 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 76 InterpolantComputations, 14 PerfectInterpolantSequences, 1226/1481 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown