/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_security.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:28:55,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:28:55,682 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:28:55,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:28:55,687 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:28:55,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:28:55,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:28:55,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:28:55,723 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:28:55,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:28:55,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:28:55,727 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:28:55,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:28:55,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:28:55,729 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:28:55,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:28:55,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:28:55,730 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:28:55,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:28:55,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:28:55,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:28:55,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:28:55,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:28:55,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:28:55,732 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:28:55,732 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:28:55,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:28:55,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:28:55,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:28:55,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:28:55,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:28:55,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:28:55,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:28:55,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:28:55,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:28:55,736 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:28:55,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:28:55,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:28:55,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:28:55,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:28:55,983 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:28:55,984 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:28:55,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-04 03:28:57,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:28:57,397 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:28:57,398 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-04 03:28:57,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b18e7252/f31397f0a9dd45189527957d63ee3b62/FLAGd6e0b63fd [2023-08-04 03:28:57,422 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b18e7252/f31397f0a9dd45189527957d63ee3b62 [2023-08-04 03:28:57,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:28:57,430 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:28:57,433 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:28:57,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:28:57,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:28:57,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,437 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b14764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57, skipping insertion in model container [2023-08-04 03:28:57,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,461 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:28:57,636 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_security.wvr_bound2.c[2093,2106] [2023-08-04 03:28:57,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:28:57,646 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:28:57,672 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_security.wvr_bound2.c[2093,2106] [2023-08-04 03:28:57,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:28:57,685 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:28:57,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57 WrapperNode [2023-08-04 03:28:57,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:28:57,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:28:57,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:28:57,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:28:57,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,729 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-04 03:28:57,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:28:57,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:28:57,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:28:57,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:28:57,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,743 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,760 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,762 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,763 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:28:57,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:28:57,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:28:57,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:28:57,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (1/1) ... [2023-08-04 03:28:57,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:28:57,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:57,794 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 03:28:57,809 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 03:28:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:28:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:28:57,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:28:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:28:57,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:28:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:28:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:28:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:28:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:28:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:28:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:28:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:28:57,837 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 03:28:57,926 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:28:57,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:28:58,123 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:28:58,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:28:58,131 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 03:28:58,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:28:58 BoogieIcfgContainer [2023-08-04 03:28:58,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:28:58,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:28:58,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:28:58,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:28:58,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:28:57" (1/3) ... [2023-08-04 03:28:58,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5677a14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:28:58, skipping insertion in model container [2023-08-04 03:28:58,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:28:57" (2/3) ... [2023-08-04 03:28:58,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5677a14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:28:58, skipping insertion in model container [2023-08-04 03:28:58,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:28:58" (3/3) ... [2023-08-04 03:28:58,140 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_security.wvr_bound2.c [2023-08-04 03:28:58,146 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:28:58,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:28:58,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:28:58,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:28:58,213 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:28:58,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,330 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 03:28:58,330 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:28:58,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 03:28:58,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:28:58,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,362 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-04 03:28:58,405 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-04 03:28:58,406 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:28:58,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-04 03:28:58,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 03:29:00,651 INFO L134 LiptonReduction]: Checked pairs total: 2847 [2023-08-04 03:29:00,651 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 03:29:00,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:29:00,670 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;@2ae7f0ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:29:00,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:29:00,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:29:00,676 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 03:29:00,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:29:00,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:00,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:29:00,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:29:00,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -605276652, now seen corresponding path program 1 times [2023-08-04 03:29:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:00,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438733476] [2023-08-04 03:29:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:29:00,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:29:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:29:00,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:29:00,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:29:00,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:29:00,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:29:00,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:29:00,833 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:29:00,836 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:29:00,836 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:29:00,837 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:29:00,864 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:29:00,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:00,984 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 03:29:00,984 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:29:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 03:29:00,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:00,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:00,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:29:01,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:01,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:01,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:01,088 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 03:29:01,088 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:29:01,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 03:29:01,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 03:29:02,912 INFO L134 LiptonReduction]: Checked pairs total: 17823 [2023-08-04 03:29:02,912 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 03:29:02,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:29:02,915 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;@2ae7f0ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:29:02,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:29:02,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:29:02,921 INFO L124 PetriNetUnfolderBase]: 5/73 cut-off events. [2023-08-04 03:29:02,921 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:29:02,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:02,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:29:02,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:29:02,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 806080073, now seen corresponding path program 1 times [2023-08-04 03:29:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351448598] [2023-08-04 03:29:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:02,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:03,038 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 03:29:03,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351448598] [2023-08-04 03:29:03,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351448598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065297191] [2023-08-04 03:29:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:03,045 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 03:29:03,054 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 03:29:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:03,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:29:03,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:03,183 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 03:29:03,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065297191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:03,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:29:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332183856] [2023-08-04 03:29:03,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:29:03,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 03:29:03,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:03,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:03,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 03:29:03,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:05,324 INFO L124 PetriNetUnfolderBase]: 17790/26844 cut-off events. [2023-08-04 03:29:05,324 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2023-08-04 03:29:05,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51821 conditions, 26844 events. 17790/26844 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 187440 event pairs, 8272 based on Foata normal form. 0/21178 useless extension candidates. Maximal degree in co-relation 10476. Up to 23164 conditions per place. [2023-08-04 03:29:05,470 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 49 selfloop transitions, 5 changer transitions 2/68 dead transitions. [2023-08-04 03:29:05,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 292 flow [2023-08-04 03:29:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:29:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:29:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 628 transitions. [2023-08-04 03:29:05,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367521367521367 [2023-08-04 03:29:05,490 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 628 transitions. [2023-08-04 03:29:05,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 628 transitions. [2023-08-04 03:29:05,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:05,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 628 transitions. [2023-08-04 03:29:05,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:05,503 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 03:29:05,504 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 03:29:05,505 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 154 flow. Second operand 5 states and 628 transitions. [2023-08-04 03:29:05,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 292 flow [2023-08-04 03:29:05,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:05,519 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 157 flow [2023-08-04 03:29:05,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2023-08-04 03:29:05,525 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 03:29:05,525 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 157 flow [2023-08-04 03:29:05,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:05,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:05,526 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:29:05,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:29:05,726 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 03:29:05,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:29:05,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1150833184, now seen corresponding path program 1 times [2023-08-04 03:29:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098492894] [2023-08-04 03:29:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:05,804 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 03:29:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098492894] [2023-08-04 03:29:05,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098492894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:05,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:29:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:29:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214861768] [2023-08-04 03:29:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:29:05,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-04 03:29:05,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:05,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:05,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-04 03:29:05,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:07,558 INFO L124 PetriNetUnfolderBase]: 17096/25885 cut-off events. [2023-08-04 03:29:07,558 INFO L125 PetriNetUnfolderBase]: For 1940/1940 co-relation queries the response was YES. [2023-08-04 03:29:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49584 conditions, 25885 events. 17096/25885 cut-off events. For 1940/1940 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 178035 event pairs, 10385 based on Foata normal form. 1/20328 useless extension candidates. Maximal degree in co-relation 8829. Up to 22216 conditions per place. [2023-08-04 03:29:07,778 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 43 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 03:29:07,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 256 flow [2023-08-04 03:29:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-04 03:29:07,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 03:29:07,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-04 03:29:07,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-04 03:29:07,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:07,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-04 03:29:07,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:07,783 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 03:29:07,784 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 03:29:07,784 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 157 flow. Second operand 3 states and 390 transitions. [2023-08-04 03:29:07,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 256 flow [2023-08-04 03:29:07,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:07,787 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 155 flow [2023-08-04 03:29:07,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-04 03:29:07,788 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 03:29:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 155 flow [2023-08-04 03:29:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:07,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:07,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:29:07,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:29:07,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1119288174, now seen corresponding path program 1 times [2023-08-04 03:29:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:07,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228625380] [2023-08-04 03:29:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:07,866 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 03:29:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:07,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228625380] [2023-08-04 03:29:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228625380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:07,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029146166] [2023-08-04 03:29:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:07,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:07,869 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 03:29:07,871 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 03:29:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:07,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:07,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:07,958 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 03:29:07,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:07,986 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 03:29:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029146166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:07,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:29:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800919620] [2023-08-04 03:29:07,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:08,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 03:29:08,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:08,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:08,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 03:29:08,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:09,218 INFO L124 PetriNetUnfolderBase]: 14407/21445 cut-off events. [2023-08-04 03:29:09,219 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2023-08-04 03:29:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41165 conditions, 21445 events. 14407/21445 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 141198 event pairs, 5416 based on Foata normal form. 5/16771 useless extension candidates. Maximal degree in co-relation 10731. Up to 18456 conditions per place. [2023-08-04 03:29:09,318 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 49 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-04 03:29:09,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 284 flow [2023-08-04 03:29:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-08-04 03:29:09,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438034188034188 [2023-08-04 03:29:09,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-08-04 03:29:09,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-08-04 03:29:09,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:09,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-08-04 03:29:09,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:09,324 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 03:29:09,324 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 03:29:09,325 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 155 flow. Second operand 4 states and 509 transitions. [2023-08-04 03:29:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 284 flow [2023-08-04 03:29:09,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:09,328 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 152 flow [2023-08-04 03:29:09,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-04 03:29:09,328 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 03:29:09,329 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 152 flow [2023-08-04 03:29:09,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:09,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:09,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:09,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:29:09,537 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 03:29:09,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:29:09,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 309655459, now seen corresponding path program 1 times [2023-08-04 03:29:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:09,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253597009] [2023-08-04 03:29:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:09,653 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 03:29:09,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253597009] [2023-08-04 03:29:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253597009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799711988] [2023-08-04 03:29:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:09,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:09,655 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 03:29:09,658 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 03:29:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:09,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:29:09,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:09,746 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 03:29:09,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:09,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799711988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:09,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:29:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568889699] [2023-08-04 03:29:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:29:09,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-04 03:29:09,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:09,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:09,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-04 03:29:09,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:10,814 INFO L124 PetriNetUnfolderBase]: 12716/18102 cut-off events. [2023-08-04 03:29:10,814 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2023-08-04 03:29:10,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36322 conditions, 18102 events. 12716/18102 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 111151 event pairs, 751 based on Foata normal form. 0/14063 useless extension candidates. Maximal degree in co-relation 9665. Up to 15030 conditions per place. [2023-08-04 03:29:10,862 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 0 selfloop transitions, 0 changer transitions 86/86 dead transitions. [2023-08-04 03:29:10,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 370 flow [2023-08-04 03:29:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:29:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:29:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 645 transitions. [2023-08-04 03:29:10,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2023-08-04 03:29:10,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 645 transitions. [2023-08-04 03:29:10,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 645 transitions. [2023-08-04 03:29:10,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:10,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 645 transitions. [2023-08-04 03:29:10,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:10,878 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 03:29:10,879 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 03:29:10,879 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 152 flow. Second operand 5 states and 645 transitions. [2023-08-04 03:29:10,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 370 flow [2023-08-04 03:29:10,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 86 transitions, 358 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 03:29:10,886 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-04 03:29:10,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-04 03:29:10,888 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 03:29:10,888 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-04 03:29:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:10,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:29:10,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:29:10,898 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 03:29:11,097 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 03:29:11,098 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:29:11,099 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:29:11,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,166 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 03:29:11,167 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:29:11,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 03:29:11,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:29:11,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-04 03:29:11,320 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-04 03:29:11,321 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:29:11,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-04 03:29:11,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 03:29:13,014 INFO L134 LiptonReduction]: Checked pairs total: 19429 [2023-08-04 03:29:13,015 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 03:29:13,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:29:13,017 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;@2ae7f0ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:29:13,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:29:13,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:29:13,019 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 03:29:13,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:29:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:13,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:29:13,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:13,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash 736447343, now seen corresponding path program 1 times [2023-08-04 03:29:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784961139] [2023-08-04 03:29:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:13,046 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 03:29:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784961139] [2023-08-04 03:29:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784961139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:13,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:29:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:29:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918948947] [2023-08-04 03:29:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:29:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 232 [2023-08-04 03:29:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 232 [2023-08-04 03:29:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:14,951 INFO L124 PetriNetUnfolderBase]: 27846/41550 cut-off events. [2023-08-04 03:29:14,951 INFO L125 PetriNetUnfolderBase]: For 3366/3366 co-relation queries the response was YES. [2023-08-04 03:29:15,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78995 conditions, 41550 events. 27846/41550 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 296168 event pairs, 16162 based on Foata normal form. 0/32143 useless extension candidates. Maximal degree in co-relation 17358. Up to 35191 conditions per place. [2023-08-04 03:29:15,179 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 46 selfloop transitions, 2 changer transitions 1/62 dead transitions. [2023-08-04 03:29:15,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 268 flow [2023-08-04 03:29:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-04 03:29:15,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675287356321839 [2023-08-04 03:29:15,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-04 03:29:15,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-04 03:29:15,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:15,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-04 03:29:15,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:15,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:15,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:15,190 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 160 flow. Second operand 3 states and 395 transitions. [2023-08-04 03:29:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 268 flow [2023-08-04 03:29:15,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:29:15,195 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 164 flow [2023-08-04 03:29:15,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-08-04 03:29:15,197 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 03:29:15,198 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 164 flow [2023-08-04 03:29:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:15,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:15,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:15,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:29:15,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:15,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1430898459, now seen corresponding path program 1 times [2023-08-04 03:29:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72593941] [2023-08-04 03:29:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:15,368 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 03:29:15,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:15,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72593941] [2023-08-04 03:29:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72593941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228859178] [2023-08-04 03:29:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:15,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:15,370 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 03:29:15,381 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 03:29:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:15,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:29:15,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:15,436 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 03:29:15,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:15,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228859178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:15,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:29:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984846202] [2023-08-04 03:29:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:15,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:15,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:15,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 232 [2023-08-04 03:29:15,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:15,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:15,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 232 [2023-08-04 03:29:15,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:17,367 INFO L124 PetriNetUnfolderBase]: 27969/40985 cut-off events. [2023-08-04 03:29:17,368 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2023-08-04 03:29:17,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79064 conditions, 40985 events. 27969/40985 cut-off events. For 2959/2959 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 284631 event pairs, 19284 based on Foata normal form. 0/31692 useless extension candidates. Maximal degree in co-relation 79015. Up to 35157 conditions per place. [2023-08-04 03:29:17,550 INFO L140 encePairwiseOnDemand]: 229/232 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-04 03:29:17,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 308 flow [2023-08-04 03:29:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-04 03:29:17,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2023-08-04 03:29:17,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-04 03:29:17,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-04 03:29:17,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:17,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-04 03:29:17,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:17,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:17,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:17,555 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 164 flow. Second operand 3 states and 402 transitions. [2023-08-04 03:29:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 308 flow [2023-08-04 03:29:17,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:17,560 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 171 flow [2023-08-04 03:29:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-04 03:29:17,561 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 03:29:17,561 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 171 flow [2023-08-04 03:29:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:17,573 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 03:29:17,773 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 03:29:17,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:17,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1410172508, now seen corresponding path program 1 times [2023-08-04 03:29:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:17,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311000707] [2023-08-04 03:29:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:17,831 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 03:29:17,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311000707] [2023-08-04 03:29:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311000707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339599382] [2023-08-04 03:29:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:17,833 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 03:29:17,858 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 03:29:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:17,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:29:17,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:17,908 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 03:29:17,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339599382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:29:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133193334] [2023-08-04 03:29:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:17,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 232 [2023-08-04 03:29:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 232 [2023-08-04 03:29:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:19,611 INFO L124 PetriNetUnfolderBase]: 21689/31841 cut-off events. [2023-08-04 03:29:19,611 INFO L125 PetriNetUnfolderBase]: For 2922/2922 co-relation queries the response was YES. [2023-08-04 03:29:19,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64111 conditions, 31841 events. 21689/31841 cut-off events. For 2922/2922 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 212496 event pairs, 12505 based on Foata normal form. 0/25300 useless extension candidates. Maximal degree in co-relation 15401. Up to 20402 conditions per place. [2023-08-04 03:29:19,771 INFO L140 encePairwiseOnDemand]: 229/232 looper letters, 63 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 03:29:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 356 flow [2023-08-04 03:29:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-04 03:29:19,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876436781609196 [2023-08-04 03:29:19,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-04 03:29:19,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-04 03:29:19,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:19,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-04 03:29:19,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:19,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:19,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:19,777 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 171 flow. Second operand 3 states and 409 transitions. [2023-08-04 03:29:19,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 356 flow [2023-08-04 03:29:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:19,780 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 181 flow [2023-08-04 03:29:19,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-04 03:29:19,781 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-08-04 03:29:19,781 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 181 flow [2023-08-04 03:29:19,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:19,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:19,789 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 03:29:19,986 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 03:29:19,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:19,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1819648022, now seen corresponding path program 1 times [2023-08-04 03:29:19,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:19,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505259542] [2023-08-04 03:29:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:19,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:20,062 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 03:29:20,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505259542] [2023-08-04 03:29:20,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505259542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151611564] [2023-08-04 03:29:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:20,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:20,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:20,067 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 03:29:20,069 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 03:29:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:20,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:29:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:20,138 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 03:29:20,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151611564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 03:29:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135863548] [2023-08-04 03:29:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:20,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 232 [2023-08-04 03:29:20,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:20,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:20,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 232 [2023-08-04 03:29:20,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:21,753 INFO L124 PetriNetUnfolderBase]: 21208/31674 cut-off events. [2023-08-04 03:29:21,753 INFO L125 PetriNetUnfolderBase]: For 7053/7053 co-relation queries the response was YES. [2023-08-04 03:29:21,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65650 conditions, 31674 events. 21208/31674 cut-off events. For 7053/7053 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 213690 event pairs, 14867 based on Foata normal form. 0/26457 useless extension candidates. Maximal degree in co-relation 21593. Up to 23376 conditions per place. [2023-08-04 03:29:21,908 INFO L140 encePairwiseOnDemand]: 229/232 looper letters, 64 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 03:29:21,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 368 flow [2023-08-04 03:29:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-04 03:29:21,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876436781609196 [2023-08-04 03:29:21,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-04 03:29:21,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-04 03:29:21,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:21,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-04 03:29:21,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:21,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:21,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:21,913 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 181 flow. Second operand 3 states and 409 transitions. [2023-08-04 03:29:21,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 368 flow [2023-08-04 03:29:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:21,949 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 191 flow [2023-08-04 03:29:21,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2023-08-04 03:29:21,950 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 03:29:21,950 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 191 flow [2023-08-04 03:29:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:21,950 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, 1, 1, 1, 1] [2023-08-04 03:29:21,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:29:22,152 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 03:29:22,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:22,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash 836413064, now seen corresponding path program 1 times [2023-08-04 03:29:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073835642] [2023-08-04 03:29:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:22,210 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 03:29:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073835642] [2023-08-04 03:29:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073835642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303890816] [2023-08-04 03:29:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:22,213 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 03:29:22,216 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 03:29:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:22,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:22,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:22,301 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 03:29:22,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:22,332 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 03:29:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303890816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:22,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:22,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:29:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261528135] [2023-08-04 03:29:22,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:22,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:22,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:22,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 232 [2023-08-04 03:29:22,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:22,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:22,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 232 [2023-08-04 03:29:22,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:23,995 INFO L124 PetriNetUnfolderBase]: 19408/28787 cut-off events. [2023-08-04 03:29:23,995 INFO L125 PetriNetUnfolderBase]: For 5118/5118 co-relation queries the response was YES. [2023-08-04 03:29:24,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60344 conditions, 28787 events. 19408/28787 cut-off events. For 5118/5118 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 189770 event pairs, 7444 based on Foata normal form. 5/24184 useless extension candidates. Maximal degree in co-relation 46377. Up to 25433 conditions per place. [2023-08-04 03:29:24,160 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 57 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-08-04 03:29:24,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 345 flow [2023-08-04 03:29:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-04 03:29:24,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549568965517241 [2023-08-04 03:29:24,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-04 03:29:24,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-04 03:29:24,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:24,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-04 03:29:24,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:24,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:24,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:24,165 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 191 flow. Second operand 4 states and 515 transitions. [2023-08-04 03:29:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 345 flow [2023-08-04 03:29:24,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:24,512 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 209 flow [2023-08-04 03:29:24,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-04 03:29:24,513 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 03:29:24,513 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 209 flow [2023-08-04 03:29:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:24,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:24,513 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, 1, 1, 1, 1] [2023-08-04 03:29:24,518 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 03:29:24,714 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 03:29:24,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:24,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1604912478, now seen corresponding path program 1 times [2023-08-04 03:29:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358555941] [2023-08-04 03:29:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:24,770 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 03:29:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358555941] [2023-08-04 03:29:24,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358555941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784926981] [2023-08-04 03:29:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:24,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:24,772 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 03:29:24,776 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 03:29:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:24,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:24,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:24,858 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 03:29:24,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:24,873 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 03:29:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784926981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:24,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:24,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:29:24,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223033283] [2023-08-04 03:29:24,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:24,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:24,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 232 [2023-08-04 03:29:24,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:24,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:24,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 232 [2023-08-04 03:29:24,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:26,254 INFO L124 PetriNetUnfolderBase]: 18283/26464 cut-off events. [2023-08-04 03:29:26,254 INFO L125 PetriNetUnfolderBase]: For 2980/2980 co-relation queries the response was YES. [2023-08-04 03:29:26,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56755 conditions, 26464 events. 18283/26464 cut-off events. For 2980/2980 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 164524 event pairs, 6992 based on Foata normal form. 125/22286 useless extension candidates. Maximal degree in co-relation 42942. Up to 19011 conditions per place. [2023-08-04 03:29:26,389 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 73 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-04 03:29:26,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 425 flow [2023-08-04 03:29:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 530 transitions. [2023-08-04 03:29:26,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711206896551724 [2023-08-04 03:29:26,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 530 transitions. [2023-08-04 03:29:26,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 530 transitions. [2023-08-04 03:29:26,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:26,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 530 transitions. [2023-08-04 03:29:26,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:26,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:26,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:26,394 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 209 flow. Second operand 4 states and 530 transitions. [2023-08-04 03:29:26,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 425 flow [2023-08-04 03:29:26,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 421 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:26,548 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 225 flow [2023-08-04 03:29:26,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-04 03:29:26,548 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2023-08-04 03:29:26,549 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 225 flow [2023-08-04 03:29:26,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:26,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:26,549 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, 1, 1, 1, 1] [2023-08-04 03:29:26,557 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 03:29:26,757 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 03:29:26,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:26,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash 592994942, now seen corresponding path program 1 times [2023-08-04 03:29:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347670360] [2023-08-04 03:29:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:26,937 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 03:29:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347670360] [2023-08-04 03:29:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347670360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440678210] [2023-08-04 03:29:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:26,946 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 03:29:26,957 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 03:29:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:27,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:27,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:27,028 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 03:29:27,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:27,041 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 03:29:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440678210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:27,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:27,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:29:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641539205] [2023-08-04 03:29:27,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:27,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 232 [2023-08-04 03:29:27,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:27,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:27,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 232 [2023-08-04 03:29:27,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:28,331 INFO L124 PetriNetUnfolderBase]: 14700/21718 cut-off events. [2023-08-04 03:29:28,331 INFO L125 PetriNetUnfolderBase]: For 9633/9633 co-relation queries the response was YES. [2023-08-04 03:29:28,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 21718 events. 14700/21718 cut-off events. For 9633/9633 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 136483 event pairs, 5909 based on Foata normal form. 425/18477 useless extension candidates. Maximal degree in co-relation 46436. Up to 9282 conditions per place. [2023-08-04 03:29:28,440 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 81 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-04 03:29:28,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 482 flow [2023-08-04 03:29:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-04 03:29:28,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786637931034483 [2023-08-04 03:29:28,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-04 03:29:28,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-04 03:29:28,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:28,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-04 03:29:28,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:28,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:28,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:28,446 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 225 flow. Second operand 4 states and 537 transitions. [2023-08-04 03:29:28,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 482 flow [2023-08-04 03:29:28,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:28,503 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 241 flow [2023-08-04 03:29:28,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-04 03:29:28,506 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2023-08-04 03:29:28,506 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 241 flow [2023-08-04 03:29:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:28,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:28,508 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, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:28,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:29:28,712 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 03:29:28,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:28,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -110066648, now seen corresponding path program 1 times [2023-08-04 03:29:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126146829] [2023-08-04 03:29:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:28,779 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 03:29:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126146829] [2023-08-04 03:29:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126146829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979446203] [2023-08-04 03:29:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:28,782 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 03:29:28,792 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 03:29:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:28,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:28,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:28,881 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 03:29:28,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:28,897 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 03:29:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979446203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:28,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:28,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:29:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493573805] [2023-08-04 03:29:28,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:28,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:28,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:28,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:28,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 232 [2023-08-04 03:29:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:28,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:28,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 232 [2023-08-04 03:29:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:30,194 INFO L124 PetriNetUnfolderBase]: 14683/21683 cut-off events. [2023-08-04 03:29:30,194 INFO L125 PetriNetUnfolderBase]: For 12633/12633 co-relation queries the response was YES. [2023-08-04 03:29:30,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51440 conditions, 21683 events. 14683/21683 cut-off events. For 12633/12633 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 136201 event pairs, 12168 based on Foata normal form. 20/17916 useless extension candidates. Maximal degree in co-relation 48881. Up to 18496 conditions per place. [2023-08-04 03:29:30,312 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 82 selfloop transitions, 3 changer transitions 1/99 dead transitions. [2023-08-04 03:29:30,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 500 flow [2023-08-04 03:29:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-04 03:29:30,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786637931034483 [2023-08-04 03:29:30,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-04 03:29:30,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-04 03:29:30,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:30,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-04 03:29:30,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:30,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:30,317 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:30,317 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 241 flow. Second operand 4 states and 537 transitions. [2023-08-04 03:29:30,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 500 flow [2023-08-04 03:29:30,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 496 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:30,648 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 251 flow [2023-08-04 03:29:30,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-04 03:29:30,650 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2023-08-04 03:29:30,650 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 251 flow [2023-08-04 03:29:30,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:30,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:30,651 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, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:30,659 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 03:29:30,855 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 03:29:30,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:30,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash -996804569, now seen corresponding path program 1 times [2023-08-04 03:29:30,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:30,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371544614] [2023-08-04 03:29:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:30,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:31,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371544614] [2023-08-04 03:29:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371544614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278177583] [2023-08-04 03:29:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:31,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:31,346 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 03:29:31,349 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 03:29:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:31,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 03:29:31,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:31,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278177583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:31,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:31,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-04 03:29:31,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805024140] [2023-08-04 03:29:31,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:31,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 03:29:31,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:31,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 03:29:31,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-08-04 03:29:31,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 232 [2023-08-04 03:29:31,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 251 flow. Second operand has 15 states, 15 states have (on average 100.33333333333333) internal successors, (1505), 15 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:31,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:31,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 232 [2023-08-04 03:29:31,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:39,358 INFO L124 PetriNetUnfolderBase]: 86326/116759 cut-off events. [2023-08-04 03:29:39,358 INFO L125 PetriNetUnfolderBase]: For 79587/79587 co-relation queries the response was YES. [2023-08-04 03:29:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282487 conditions, 116759 events. 86326/116759 cut-off events. For 79587/79587 co-relation queries the response was YES. Maximal size of possible extension queue 2780. Compared 731754 event pairs, 5362 based on Foata normal form. 2/104171 useless extension candidates. Maximal degree in co-relation 281778. Up to 25874 conditions per place. [2023-08-04 03:29:39,860 INFO L140 encePairwiseOnDemand]: 210/232 looper letters, 274 selfloop transitions, 37 changer transitions 201/516 dead transitions. [2023-08-04 03:29:39,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 516 transitions, 3006 flow [2023-08-04 03:29:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 03:29:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 03:29:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1788 transitions. [2023-08-04 03:29:39,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504926108374384 [2023-08-04 03:29:39,866 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1788 transitions. [2023-08-04 03:29:39,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1788 transitions. [2023-08-04 03:29:39,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:39,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1788 transitions. [2023-08-04 03:29:39,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:39,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 232.0) internal successors, (3480), 15 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:39,874 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 232.0) internal successors, (3480), 15 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:39,875 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 251 flow. Second operand 14 states and 1788 transitions. [2023-08-04 03:29:39,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 516 transitions, 3006 flow [2023-08-04 03:29:40,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 516 transitions, 2970 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:40,684 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 553 flow [2023-08-04 03:29:40,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=553, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2023-08-04 03:29:40,685 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 44 predicate places. [2023-08-04 03:29:40,685 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 553 flow [2023-08-04 03:29:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 100.33333333333333) internal successors, (1505), 15 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:40,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:40,686 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, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:40,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 03:29:40,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:29:40,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:40,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash -816931989, now seen corresponding path program 2 times [2023-08-04 03:29:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249889500] [2023-08-04 03:29:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249889500] [2023-08-04 03:29:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249889500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520710053] [2023-08-04 03:29:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:29:41,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:41,182 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 03:29:41,184 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 03:29:41,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:29:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:29:41,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-04 03:29:41,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:41,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:41,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520710053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:41,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:41,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-04 03:29:41,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305795334] [2023-08-04 03:29:41,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 03:29:41,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 03:29:41,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-04 03:29:42,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 232 [2023-08-04 03:29:42,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 553 flow. Second operand has 14 states, 14 states have (on average 99.64285714285714) internal successors, (1395), 14 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:42,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:42,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 232 [2023-08-04 03:29:42,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:59,225 INFO L124 PetriNetUnfolderBase]: 145162/208822 cut-off events. [2023-08-04 03:29:59,226 INFO L125 PetriNetUnfolderBase]: For 384915/384915 co-relation queries the response was YES. [2023-08-04 03:30:00,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723145 conditions, 208822 events. 145162/208822 cut-off events. For 384915/384915 co-relation queries the response was YES. Maximal size of possible extension queue 5286. Compared 1643483 event pairs, 9210 based on Foata normal form. 2/197274 useless extension candidates. Maximal degree in co-relation 723099. Up to 42509 conditions per place. [2023-08-04 03:30:00,756 INFO L140 encePairwiseOnDemand]: 210/232 looper letters, 520 selfloop transitions, 143 changer transitions 163/830 dead transitions. [2023-08-04 03:30:00,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 830 transitions, 6466 flow [2023-08-04 03:30:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-04 03:30:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-04 03:30:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2840 transitions. [2023-08-04 03:30:00,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322338830584707 [2023-08-04 03:30:00,763 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2840 transitions. [2023-08-04 03:30:00,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2840 transitions. [2023-08-04 03:30:00,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:00,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2840 transitions. [2023-08-04 03:30:00,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 123.47826086956522) internal successors, (2840), 23 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:00,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 232.0) internal successors, (5568), 24 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:00,779 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 232.0) internal successors, (5568), 24 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:00,779 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 553 flow. Second operand 23 states and 2840 transitions. [2023-08-04 03:30:00,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 830 transitions, 6466 flow [2023-08-04 03:30:12,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 830 transitions, 6285 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-04 03:30:12,750 INFO L231 Difference]: Finished difference. Result has 128 places, 219 transitions, 2053 flow [2023-08-04 03:30:12,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2053, PETRI_PLACES=128, PETRI_TRANSITIONS=219} [2023-08-04 03:30:12,751 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2023-08-04 03:30:12,751 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 219 transitions, 2053 flow [2023-08-04 03:30:12,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.64285714285714) internal successors, (1395), 14 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:12,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:12,752 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, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:12,760 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 03:30:12,957 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,SelfDestructingSolverStorable14 [2023-08-04 03:30:12,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:30:12,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1620922417, now seen corresponding path program 1 times [2023-08-04 03:30:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:12,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227728646] [2023-08-04 03:30:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:12,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:30:13,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:13,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227728646] [2023-08-04 03:30:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227728646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:13,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472251474] [2023-08-04 03:30:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:13,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:13,284 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 03:30:13,289 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 03:30:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:13,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-04 03:30:13,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:30:13,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:30:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:30:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472251474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:30:14,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:30:14,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-04 03:30:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46933276] [2023-08-04 03:30:14,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:30:14,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 03:30:14,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 03:30:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-04 03:30:14,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 232 [2023-08-04 03:30:14,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 219 transitions, 2053 flow. Second operand has 15 states, 15 states have (on average 100.26666666666667) internal successors, (1504), 15 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:14,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 232 [2023-08-04 03:30:14,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:51,299 INFO L124 PetriNetUnfolderBase]: 217856/325517 cut-off events. [2023-08-04 03:30:51,300 INFO L125 PetriNetUnfolderBase]: For 2072776/2072776 co-relation queries the response was YES. [2023-08-04 03:30:53,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528024 conditions, 325517 events. 217856/325517 cut-off events. For 2072776/2072776 co-relation queries the response was YES. Maximal size of possible extension queue 9121. Compared 2877048 event pairs, 54041 based on Foata normal form. 3/311441 useless extension candidates. Maximal degree in co-relation 1527939. Up to 125154 conditions per place. [2023-08-04 03:30:54,102 INFO L140 encePairwiseOnDemand]: 210/232 looper letters, 424 selfloop transitions, 103 changer transitions 144/675 dead transitions. [2023-08-04 03:30:54,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 675 transitions, 7781 flow [2023-08-04 03:30:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 03:30:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 03:30:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1712 transitions. [2023-08-04 03:30:54,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2023-08-04 03:30:54,106 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1712 transitions. [2023-08-04 03:30:54,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1712 transitions. [2023-08-04 03:30:54,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:54,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1712 transitions. [2023-08-04 03:30:54,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 122.28571428571429) internal successors, (1712), 14 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:54,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 232.0) internal successors, (3480), 15 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:54,115 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 232.0) internal successors, (3480), 15 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:54,115 INFO L175 Difference]: Start difference. First operand has 128 places, 219 transitions, 2053 flow. Second operand 14 states and 1712 transitions. [2023-08-04 03:30:54,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 675 transitions, 7781 flow