/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_parallel-misc-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:30:32,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:30:32,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:30:32,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:30:32,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:30:32,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:30:32,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:30:32,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:30:32,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:30:32,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:30:32,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:30:32,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:30:32,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:30:32,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:30:32,418 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:30:32,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:30:32,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:30:32,419 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:30:32,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:30:32,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:30:32,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:30:32,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:30:32,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:30:32,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:30:32,421 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:30:32,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:30:32,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:30:32,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:30:32,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:30:32,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:30:32,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:30:32,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:30:32,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:30:32,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:30:32,424 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:30:32,425 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:30:32,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:30:32,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:30:32,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:30:32,648 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:30:32,648 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:30:32,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 02:30:33,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:30:34,044 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:30:34,044 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 02:30:34,054 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91e542ee/28bfc51995be45219a1d607a21ea3e2e/FLAG77a2a975f [2023-08-04 02:30:34,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91e542ee/28bfc51995be45219a1d607a21ea3e2e [2023-08-04 02:30:34,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:30:34,076 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:30:34,078 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:30:34,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:30:34,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:30:34,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6155edc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34, skipping insertion in model container [2023-08-04 02:30:34,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,105 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:30:34,258 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_parallel-misc-3.wvr_bound2.c[2572,2585] [2023-08-04 02:30:34,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:30:34,267 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:30:34,285 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_parallel-misc-3.wvr_bound2.c[2572,2585] [2023-08-04 02:30:34,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:30:34,293 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:30:34,293 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:30:34,298 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:30:34,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34 WrapperNode [2023-08-04 02:30:34,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:30:34,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:30:34,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:30:34,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:30:34,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,326 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-08-04 02:30:34,327 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:30:34,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:30:34,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:30:34,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:30:34,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,342 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:30:34,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:30:34,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:30:34,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:30:34,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (1/1) ... [2023-08-04 02:30:34,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:30:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:34,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:30:34,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:30:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:30:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:30:34,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:30:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:30:34,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:30:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:30:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:30:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:30:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:30:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:30:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:30:34,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:30:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:30:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:30:34,431 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:30:34,511 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:30:34,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:30:34,684 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:30:34,704 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:30:34,704 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:30:34,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:30:34 BoogieIcfgContainer [2023-08-04 02:30:34,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:30:34,716 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:30:34,716 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:30:34,719 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:30:34,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:30:34" (1/3) ... [2023-08-04 02:30:34,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4055ccc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:30:34, skipping insertion in model container [2023-08-04 02:30:34,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:30:34" (2/3) ... [2023-08-04 02:30:34,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4055ccc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:30:34, skipping insertion in model container [2023-08-04 02:30:34,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:30:34" (3/3) ... [2023-08-04 02:30:34,721 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-3.wvr_bound2.c [2023-08-04 02:30:34,729 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:30:34,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:30:34,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:30:34,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:30:34,804 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:30:34,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:34,958 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 02:30:34,958 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:30:34,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 02:30:34,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:34,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:34,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:30:34,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:35,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:35,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 122 transitions, 266 flow [2023-08-04 02:30:35,065 INFO L124 PetriNetUnfolderBase]: 41/270 cut-off events. [2023-08-04 02:30:35,066 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:30:35,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 270 events. 41/270 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 951 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 02:30:35,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 4608 [2023-08-04 02:30:37,900 INFO L134 LiptonReduction]: Checked pairs total: 4475 [2023-08-04 02:30:37,901 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 02:30:37,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:30:37,919 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;@42f1872d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:30:37,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:30:37,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:30:37,924 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-08-04 02:30:37,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:30:37,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:37,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:30:37,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:30:37,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2110498640, now seen corresponding path program 1 times [2023-08-04 02:30:37,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:37,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245205248] [2023-08-04 02:30:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:30:38,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:30:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:30:38,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:30:38,084 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:30:38,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:30:38,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:30:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:30:38,087 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:30:38,093 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:30:38,094 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:30:38,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:30:38,121 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:30:38,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,225 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 02:30:38,225 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:30:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 02:30:38,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:30:38,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:38,364 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 02:30:38,364 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:30:38,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 02:30:38,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 12528 [2023-08-04 02:30:40,218 INFO L134 LiptonReduction]: Checked pairs total: 39620 [2023-08-04 02:30:40,219 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 02:30:40,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:30:40,222 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;@42f1872d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:30:40,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:30:40,228 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:30:40,229 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2023-08-04 02:30:40,229 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:30:40,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:30:40,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:30:40,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1495652104, now seen corresponding path program 1 times [2023-08-04 02:30:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666715137] [2023-08-04 02:30:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:30:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666715137] [2023-08-04 02:30:40,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666715137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196526446] [2023-08-04 02:30:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:40,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:40,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:30:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:40,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:30:40,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:30:40,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:40,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196526446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:40,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:40,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:30:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289782205] [2023-08-04 02:30:40,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:40,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:30:40,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:40,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:40,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:40,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:40,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:42,253 INFO L124 PetriNetUnfolderBase]: 15112/19635 cut-off events. [2023-08-04 02:30:42,253 INFO L125 PetriNetUnfolderBase]: For 1183/1183 co-relation queries the response was YES. [2023-08-04 02:30:42,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 19635 events. 15112/19635 cut-off events. For 1183/1183 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 103177 event pairs, 3142 based on Foata normal form. 0/15040 useless extension candidates. Maximal degree in co-relation 9753. Up to 18303 conditions per place. [2023-08-04 02:30:42,390 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 62 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-08-04 02:30:42,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 362 flow [2023-08-04 02:30:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:30:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:30:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2023-08-04 02:30:42,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338181818181819 [2023-08-04 02:30:42,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2023-08-04 02:30:42,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2023-08-04 02:30:42,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:42,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2023-08-04 02:30:42,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,421 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 192 flow. Second operand 5 states and 734 transitions. [2023-08-04 02:30:42,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 362 flow [2023-08-04 02:30:42,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:30:42,427 INFO L231 Difference]: Finished difference. Result has 62 places, 73 transitions, 201 flow [2023-08-04 02:30:42,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=62, PETRI_TRANSITIONS=73} [2023-08-04 02:30:42,432 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 02:30:42,432 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 73 transitions, 201 flow [2023-08-04 02:30:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:42,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:30:42,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:42,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:30:42,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2054875763, now seen corresponding path program 1 times [2023-08-04 02:30:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883637663] [2023-08-04 02:30:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883637663] [2023-08-04 02:30:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883637663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:42,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:30:42,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:30:42,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305562634] [2023-08-04 02:30:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:42,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:30:42,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 02:30:42,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 73 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:42,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 02:30:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:44,081 INFO L124 PetriNetUnfolderBase]: 15019/19444 cut-off events. [2023-08-04 02:30:44,081 INFO L125 PetriNetUnfolderBase]: For 1054/1054 co-relation queries the response was YES. [2023-08-04 02:30:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38784 conditions, 19444 events. 15019/19444 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 100460 event pairs, 5043 based on Foata normal form. 1/14906 useless extension candidates. Maximal degree in co-relation 8782. Up to 18249 conditions per place. [2023-08-04 02:30:44,213 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 52 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 02:30:44,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 320 flow [2023-08-04 02:30:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-04 02:30:44,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527272727272727 [2023-08-04 02:30:44,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-04 02:30:44,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-04 02:30:44,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:44,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-04 02:30:44,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:44,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:44,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:44,220 INFO L175 Difference]: Start difference. First operand has 62 places, 73 transitions, 201 flow. Second operand 3 states and 456 transitions. [2023-08-04 02:30:44,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 320 flow [2023-08-04 02:30:44,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:44,225 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 199 flow [2023-08-04 02:30:44,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 02:30:44,226 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 02:30:44,226 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 199 flow [2023-08-04 02:30:44,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:44,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:44,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:30:44,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:30:44,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1798844984, now seen corresponding path program 1 times [2023-08-04 02:30:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:44,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898548342] [2023-08-04 02:30:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898548342] [2023-08-04 02:30:44,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898548342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968662581] [2023-08-04 02:30:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:44,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:44,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:44,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:30:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:44,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:44,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:44,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968662581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:44,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:44,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:30:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147950469] [2023-08-04 02:30:44,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:44,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:44,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:45,663 INFO L124 PetriNetUnfolderBase]: 14419/18556 cut-off events. [2023-08-04 02:30:45,663 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2023-08-04 02:30:45,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37069 conditions, 18556 events. 14419/18556 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 94277 event pairs, 4283 based on Foata normal form. 4/14295 useless extension candidates. Maximal degree in co-relation 11398. Up to 17441 conditions per place. [2023-08-04 02:30:45,871 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 62 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-04 02:30:45,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 364 flow [2023-08-04 02:30:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:30:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:30:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 598 transitions. [2023-08-04 02:30:45,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436363636363636 [2023-08-04 02:30:45,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 598 transitions. [2023-08-04 02:30:45,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 598 transitions. [2023-08-04 02:30:45,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:45,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 598 transitions. [2023-08-04 02:30:45,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.5) internal successors, (598), 4 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 02:30:45,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:45,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:45,878 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 199 flow. Second operand 4 states and 598 transitions. [2023-08-04 02:30:45,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 364 flow [2023-08-04 02:30:45,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:30:45,883 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 196 flow [2023-08-04 02:30:45,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2023-08-04 02:30:45,885 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-04 02:30:45,885 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 196 flow [2023-08-04 02:30:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:45,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:45,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:46,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:30:46,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:30:46,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1253782782, now seen corresponding path program 1 times [2023-08-04 02:30:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:46,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104645115] [2023-08-04 02:30:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:30:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104645115] [2023-08-04 02:30:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104645115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876411524] [2023-08-04 02:30:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:46,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:30:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:46,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:30:46,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:30:46,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876411524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:30:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474438916] [2023-08-04 02:30:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:30:46,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:46,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:46,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:46,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:46,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:47,154 INFO L124 PetriNetUnfolderBase]: 13603/17546 cut-off events. [2023-08-04 02:30:47,154 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2023-08-04 02:30:47,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34923 conditions, 17546 events. 13603/17546 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 89749 event pairs, 85 based on Foata normal form. 0/13721 useless extension candidates. Maximal degree in co-relation 9172. Up to 14688 conditions per place. [2023-08-04 02:30:47,198 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 0 selfloop transitions, 0 changer transitions 122/122 dead transitions. [2023-08-04 02:30:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 122 transitions, 490 flow [2023-08-04 02:30:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:30:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:30:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 763 transitions. [2023-08-04 02:30:47,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549090909090909 [2023-08-04 02:30:47,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 763 transitions. [2023-08-04 02:30:47,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 763 transitions. [2023-08-04 02:30:47,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:47,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 763 transitions. [2023-08-04 02:30:47,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:47,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:47,209 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:47,209 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 196 flow. Second operand 5 states and 763 transitions. [2023-08-04 02:30:47,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 122 transitions, 490 flow [2023-08-04 02:30:47,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 122 transitions, 478 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 02:30:47,214 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 02:30:47,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 02:30:47,215 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 02:30:47,216 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 02:30:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:47,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:30:47,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:30:47,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:47,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:47,421 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:30:47,422 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:30:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,499 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 02:30:47,499 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:30:47,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 02:30:47,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:30:47,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 164 transitions, 376 flow [2023-08-04 02:30:47,562 INFO L124 PetriNetUnfolderBase]: 157/885 cut-off events. [2023-08-04 02:30:47,562 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:30:47,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 885 events. 157/885 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4602 event pairs, 1 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2023-08-04 02:30:47,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 12528 [2023-08-04 02:30:49,521 INFO L134 LiptonReduction]: Checked pairs total: 44197 [2023-08-04 02:30:49,521 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 02:30:49,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:30:49,524 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;@42f1872d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:30:49,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:30:49,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:30:49,525 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 02:30:49,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:30:49,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:49,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 02:30:49,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:49,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 891540290, now seen corresponding path program 1 times [2023-08-04 02:30:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591985967] [2023-08-04 02:30:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:30:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591985967] [2023-08-04 02:30:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591985967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:49,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:30:49,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:30:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640726335] [2023-08-04 02:30:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:49,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:30:49,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 02:30:49,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:49,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:49,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 02:30:49,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:50,416 INFO L124 PetriNetUnfolderBase]: 15063/19492 cut-off events. [2023-08-04 02:30:50,417 INFO L125 PetriNetUnfolderBase]: For 1210/1210 co-relation queries the response was YES. [2023-08-04 02:30:50,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39037 conditions, 19492 events. 15063/19492 cut-off events. For 1210/1210 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 100643 event pairs, 5055 based on Foata normal form. 0/14933 useless extension candidates. Maximal degree in co-relation 9742. Up to 18313 conditions per place. [2023-08-04 02:30:50,544 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 51 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 02:30:50,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 312 flow [2023-08-04 02:30:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 02:30:50,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553939393939394 [2023-08-04 02:30:50,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 02:30:50,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 02:30:50,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:50,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 02:30:50,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:50,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:50,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:50,553 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 192 flow. Second operand 3 states and 457 transitions. [2023-08-04 02:30:50,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 312 flow [2023-08-04 02:30:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:30:50,557 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 196 flow [2023-08-04 02:30:50,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 02:30:50,560 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 02:30:50,560 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 196 flow [2023-08-04 02:30:50,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:50,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:50,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:50,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:30:50,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:50,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2118640439, now seen corresponding path program 1 times [2023-08-04 02:30:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625922928] [2023-08-04 02:30:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:30:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625922928] [2023-08-04 02:30:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625922928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187480400] [2023-08-04 02:30:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:50,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:50,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:50,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:30:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:50,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:30:50,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:30:50,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187480400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:50,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:50,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:30:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118375274] [2023-08-04 02:30:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:50,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:50,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 02:30:50,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:50,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:50,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 02:30:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:51,773 INFO L124 PetriNetUnfolderBase]: 15047/19518 cut-off events. [2023-08-04 02:30:51,773 INFO L125 PetriNetUnfolderBase]: For 1025/1025 co-relation queries the response was YES. [2023-08-04 02:30:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39066 conditions, 19518 events. 15047/19518 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 102389 event pairs, 5353 based on Foata normal form. 0/15019 useless extension candidates. Maximal degree in co-relation 22271. Up to 17892 conditions per place. [2023-08-04 02:30:51,940 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 62 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 02:30:51,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 360 flow [2023-08-04 02:30:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 02:30:51,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648484848484848 [2023-08-04 02:30:51,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 02:30:51,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 02:30:51,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:51,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 02:30:51,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:51,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:51,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:51,951 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 196 flow. Second operand 3 states and 466 transitions. [2023-08-04 02:30:51,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 360 flow [2023-08-04 02:30:51,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:30:51,957 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 203 flow [2023-08-04 02:30:51,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 02:30:51,958 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 02:30:51,959 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 203 flow [2023-08-04 02:30:51,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:51,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:51,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:52,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:52,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:52,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1348738254, now seen corresponding path program 1 times [2023-08-04 02:30:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623084999] [2023-08-04 02:30:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:30:52,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:52,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623084999] [2023-08-04 02:30:52,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623084999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:52,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276746360] [2023-08-04 02:30:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:52,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:52,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:30:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:52,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:30:52,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:30:52,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276746360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:30:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194833997] [2023-08-04 02:30:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:52,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 02:30:52,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:52,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:52,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 02:30:52,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:53,190 INFO L124 PetriNetUnfolderBase]: 12667/16698 cut-off events. [2023-08-04 02:30:53,190 INFO L125 PetriNetUnfolderBase]: For 1111/1111 co-relation queries the response was YES. [2023-08-04 02:30:53,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33991 conditions, 16698 events. 12667/16698 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 88380 event pairs, 4360 based on Foata normal form. 0/13312 useless extension candidates. Maximal degree in co-relation 7874. Up to 11538 conditions per place. [2023-08-04 02:30:53,301 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 71 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 02:30:53,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 412 flow [2023-08-04 02:30:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 02:30:53,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745454545454546 [2023-08-04 02:30:53,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 02:30:53,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 02:30:53,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:53,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 02:30:53,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:53,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:53,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:53,307 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 203 flow. Second operand 3 states and 474 transitions. [2023-08-04 02:30:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 412 flow [2023-08-04 02:30:53,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:53,313 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 213 flow [2023-08-04 02:30:53,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 02:30:53,314 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 02:30:53,314 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 213 flow [2023-08-04 02:30:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:53,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:53,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:53,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:30:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:53,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1700718275, now seen corresponding path program 1 times [2023-08-04 02:30:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:53,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891625792] [2023-08-04 02:30:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:30:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891625792] [2023-08-04 02:30:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891625792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16174795] [2023-08-04 02:30:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:53,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:53,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:30:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:53,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:30:53,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:30:53,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:53,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16174795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:53,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:53,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:30:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731710008] [2023-08-04 02:30:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:53,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 275 [2023-08-04 02:30:53,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:53,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:53,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 275 [2023-08-04 02:30:53,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:54,462 INFO L124 PetriNetUnfolderBase]: 12385/16454 cut-off events. [2023-08-04 02:30:54,463 INFO L125 PetriNetUnfolderBase]: For 2082/2082 co-relation queries the response was YES. [2023-08-04 02:30:54,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34531 conditions, 16454 events. 12385/16454 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 87424 event pairs, 4928 based on Foata normal form. 0/13462 useless extension candidates. Maximal degree in co-relation 10558. Up to 12503 conditions per place. [2023-08-04 02:30:54,550 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 72 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 02:30:54,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 424 flow [2023-08-04 02:30:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 02:30:54,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745454545454546 [2023-08-04 02:30:54,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 02:30:54,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 02:30:54,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:54,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 02:30:54,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:54,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:54,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:54,555 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 213 flow. Second operand 3 states and 474 transitions. [2023-08-04 02:30:54,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 424 flow [2023-08-04 02:30:54,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:54,575 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 223 flow [2023-08-04 02:30:54,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 02:30:54,575 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 02:30:54,575 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 223 flow [2023-08-04 02:30:54,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:54,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:54,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:54,580 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 02:30:54,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:54,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:54,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2013979954, now seen corresponding path program 1 times [2023-08-04 02:30:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290832329] [2023-08-04 02:30:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:54,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:30:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290832329] [2023-08-04 02:30:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290832329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:54,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197297630] [2023-08-04 02:30:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:54,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:54,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:30:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:54,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:54,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:30:54,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:30:54,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197297630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:54,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:54,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:30:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138654276] [2023-08-04 02:30:54,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:54,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:54,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:54,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:54,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:54,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:55,676 INFO L124 PetriNetUnfolderBase]: 11361/15006 cut-off events. [2023-08-04 02:30:55,676 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 02:30:55,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 15006 events. 11361/15006 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78266 event pairs, 2363 based on Foata normal form. 4/12415 useless extension candidates. Maximal degree in co-relation 22946. Up to 13894 conditions per place. [2023-08-04 02:30:55,750 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 65 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2023-08-04 02:30:55,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 401 flow [2023-08-04 02:30:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:30:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:30:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 02:30:55,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445454545454546 [2023-08-04 02:30:55,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 02:30:55,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 02:30:55,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:55,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 02:30:55,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 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 02:30:55,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:55,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:55,754 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 223 flow. Second operand 4 states and 599 transitions. [2023-08-04 02:30:55,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 401 flow [2023-08-04 02:30:55,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:55,798 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 235 flow [2023-08-04 02:30:55,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2023-08-04 02:30:55,799 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 02:30:55,799 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 235 flow [2023-08-04 02:30:55,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:55,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:55,800 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] [2023-08-04 02:30:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:56,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:56,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1792802078, now seen corresponding path program 1 times [2023-08-04 02:30:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619981574] [2023-08-04 02:30:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:56,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:56,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619981574] [2023-08-04 02:30:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619981574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:56,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881703350] [2023-08-04 02:30:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:56,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:56,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:56,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:56,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:30:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:56,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:56,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:56,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:56,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881703350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:56,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:56,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:30:56,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779466142] [2023-08-04 02:30:56,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:56,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:56,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:56,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:56,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:56,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:56,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:56,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:56,841 INFO L124 PetriNetUnfolderBase]: 10741/14194 cut-off events. [2023-08-04 02:30:56,841 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 02:30:56,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29999 conditions, 14194 events. 10741/14194 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 73336 event pairs, 2964 based on Foata normal form. 48/11845 useless extension candidates. Maximal degree in co-relation 21245. Up to 10579 conditions per place. [2023-08-04 02:30:56,919 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 83 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2023-08-04 02:30:56,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 485 flow [2023-08-04 02:30:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:30:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:30:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-04 02:30:56,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609090909090909 [2023-08-04 02:30:56,921 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-04 02:30:56,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-04 02:30:56,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:56,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-04 02:30:56,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:56,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:56,926 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:56,926 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 235 flow. Second operand 4 states and 617 transitions. [2023-08-04 02:30:56,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 485 flow [2023-08-04 02:30:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 476 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:30:56,957 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 246 flow [2023-08-04 02:30:56,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-04 02:30:56,958 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-04 02:30:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 246 flow [2023-08-04 02:30:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:56,959 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] [2023-08-04 02:30:56,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:57,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:30:57,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:57,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash 121207592, now seen corresponding path program 1 times [2023-08-04 02:30:57,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:57,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506003584] [2023-08-04 02:30:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:57,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:30:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506003584] [2023-08-04 02:30:57,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506003584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604621815] [2023-08-04 02:30:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:57,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:57,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:30:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:57,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:57,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:30:57,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:30:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604621815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:57,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:30:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714924263] [2023-08-04 02:30:57,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:57,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:57,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:57,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:57,918 INFO L124 PetriNetUnfolderBase]: 8342/11114 cut-off events. [2023-08-04 02:30:57,918 INFO L125 PetriNetUnfolderBase]: For 2552/2552 co-relation queries the response was YES. [2023-08-04 02:30:57,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 11114 events. 8342/11114 cut-off events. For 2552/2552 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55441 event pairs, 1945 based on Foata normal form. 168/9333 useless extension candidates. Maximal degree in co-relation 22140. Up to 4918 conditions per place. [2023-08-04 02:30:57,979 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-04 02:30:57,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 540 flow [2023-08-04 02:30:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:30:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:30:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-04 02:30:57,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 02:30:57,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-04 02:30:57,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-04 02:30:57,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:57,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-04 02:30:57,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:57,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:57,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:57,986 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 246 flow. Second operand 4 states and 625 transitions. [2023-08-04 02:30:57,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 540 flow [2023-08-04 02:30:58,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 536 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:58,003 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 262 flow [2023-08-04 02:30:58,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-08-04 02:30:58,004 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 16 predicate places. [2023-08-04 02:30:58,004 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 262 flow [2023-08-04 02:30:58,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:58,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:58,005 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] [2023-08-04 02:30:58,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:30:58,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:58,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:58,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash 32989200, now seen corresponding path program 1 times [2023-08-04 02:30:58,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:58,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055324983] [2023-08-04 02:30:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:58,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:30:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055324983] [2023-08-04 02:30:58,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055324983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:58,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514618994] [2023-08-04 02:30:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:58,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:58,271 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:58,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:30:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:58,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:58,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:30:58,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:30:58,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514618994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:58,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:58,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:30:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821809757] [2023-08-04 02:30:58,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:58,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:58,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:30:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:30:58,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:59,045 INFO L124 PetriNetUnfolderBase]: 8322/11081 cut-off events. [2023-08-04 02:30:59,045 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2023-08-04 02:30:59,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24999 conditions, 11081 events. 8322/11081 cut-off events. For 3736/3736 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55476 event pairs, 3834 based on Foata normal form. 15/9103 useless extension candidates. Maximal degree in co-relation 23100. Up to 9420 conditions per place. [2023-08-04 02:30:59,084 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 93 selfloop transitions, 3 changer transitions 1/122 dead transitions. [2023-08-04 02:30:59,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 558 flow [2023-08-04 02:30:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:30:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:30:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-04 02:30:59,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 02:30:59,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-04 02:30:59,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-04 02:30:59,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:59,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-04 02:30:59,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:59,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:59,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:59,090 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 262 flow. Second operand 4 states and 625 transitions. [2023-08-04 02:30:59,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 558 flow [2023-08-04 02:30:59,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 554 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:59,110 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 272 flow [2023-08-04 02:30:59,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2023-08-04 02:30:59,110 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2023-08-04 02:30:59,110 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 272 flow [2023-08-04 02:30:59,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:59,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:59,111 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] [2023-08-04 02:30:59,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:59,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:30:59,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:59,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 986515274, now seen corresponding path program 1 times [2023-08-04 02:30:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410614430] [2023-08-04 02:30:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:30:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410614430] [2023-08-04 02:30:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410614430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:59,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:30:59,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:30:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401622040] [2023-08-04 02:30:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:30:59,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 275 [2023-08-04 02:30:59,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:59,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:59,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 275 [2023-08-04 02:30:59,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:00,248 INFO L124 PetriNetUnfolderBase]: 12070/16266 cut-off events. [2023-08-04 02:31:00,249 INFO L125 PetriNetUnfolderBase]: For 6375/6375 co-relation queries the response was YES. [2023-08-04 02:31:00,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35941 conditions, 16266 events. 12070/16266 cut-off events. For 6375/6375 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 89425 event pairs, 2129 based on Foata normal form. 489/13570 useless extension candidates. Maximal degree in co-relation 35719. Up to 10678 conditions per place. [2023-08-04 02:31:00,350 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 85 selfloop transitions, 3 changer transitions 1/114 dead transitions. [2023-08-04 02:31:00,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 607 flow [2023-08-04 02:31:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:31:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:31:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 02:31:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576969696969697 [2023-08-04 02:31:00,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 02:31:00,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 02:31:00,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:00,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 02:31:00,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:00,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:00,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:00,354 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 272 flow. Second operand 3 states and 476 transitions. [2023-08-04 02:31:00,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 607 flow [2023-08-04 02:31:00,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 599 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:31:00,388 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 287 flow [2023-08-04 02:31:00,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-04 02:31:00,389 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 21 predicate places. [2023-08-04 02:31:00,389 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 287 flow [2023-08-04 02:31:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:00,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:00,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:31:00,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 02:31:00,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:00,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash 257465483, now seen corresponding path program 1 times [2023-08-04 02:31:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235757128] [2023-08-04 02:31:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:31:00,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235757128] [2023-08-04 02:31:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235757128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:31:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:31:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890557310] [2023-08-04 02:31:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:31:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:31:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:31:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 275 [2023-08-04 02:31:00,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:00,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:00,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 275 [2023-08-04 02:31:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:01,654 INFO L124 PetriNetUnfolderBase]: 16637/22862 cut-off events. [2023-08-04 02:31:01,655 INFO L125 PetriNetUnfolderBase]: For 10169/10169 co-relation queries the response was YES. [2023-08-04 02:31:01,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52061 conditions, 22862 events. 16637/22862 cut-off events. For 10169/10169 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 130295 event pairs, 2568 based on Foata normal form. 691/18884 useless extension candidates. Maximal degree in co-relation 51832. Up to 14929 conditions per place. [2023-08-04 02:31:01,819 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 84 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2023-08-04 02:31:01,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 597 flow [2023-08-04 02:31:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:31:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:31:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 02:31:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709090909090909 [2023-08-04 02:31:01,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 02:31:01,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 02:31:01,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:01,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 02:31:01,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:01,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:01,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:01,824 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 287 flow. Second operand 3 states and 471 transitions. [2023-08-04 02:31:01,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 597 flow [2023-08-04 02:31:01,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:31:01,879 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 305 flow [2023-08-04 02:31:01,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-04 02:31:01,880 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 23 predicate places. [2023-08-04 02:31:01,880 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 305 flow [2023-08-04 02:31:01,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:01,881 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 02:31:01,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:31:01,881 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:01,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash -434126368, now seen corresponding path program 1 times [2023-08-04 02:31:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791654385] [2023-08-04 02:31:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:31:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791654385] [2023-08-04 02:31:01,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791654385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:01,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:31:01,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:31:01,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570688927] [2023-08-04 02:31:01,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:31:01,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:31:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:31:01,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 275 [2023-08-04 02:31:01,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:01,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:01,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 275 [2023-08-04 02:31:01,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:04,674 INFO L124 PetriNetUnfolderBase]: 43566/55994 cut-off events. [2023-08-04 02:31:04,674 INFO L125 PetriNetUnfolderBase]: For 33484/33484 co-relation queries the response was YES. [2023-08-04 02:31:04,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136358 conditions, 55994 events. 43566/55994 cut-off events. For 33484/33484 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 300029 event pairs, 5350 based on Foata normal form. 383/48250 useless extension candidates. Maximal degree in co-relation 136072. Up to 50521 conditions per place. [2023-08-04 02:31:05,102 INFO L140 encePairwiseOnDemand]: 270/275 looper letters, 84 selfloop transitions, 3 changer transitions 3/110 dead transitions. [2023-08-04 02:31:05,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 609 flow [2023-08-04 02:31:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:31:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:31:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 02:31:05,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2023-08-04 02:31:05,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 02:31:05,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 02:31:05,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:05,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 02:31:05,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:05,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:05,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:05,107 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 305 flow. Second operand 3 states and 465 transitions. [2023-08-04 02:31:05,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 609 flow [2023-08-04 02:31:05,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:31:05,718 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 317 flow [2023-08-04 02:31:05,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-08-04 02:31:05,718 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2023-08-04 02:31:05,718 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 317 flow [2023-08-04 02:31:05,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:05,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:05,719 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 02:31:05,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 02:31:05,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:05,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 321333492, now seen corresponding path program 1 times [2023-08-04 02:31:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:05,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532822352] [2023-08-04 02:31:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:31:05,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:05,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532822352] [2023-08-04 02:31:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532822352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:05,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:31:05,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:31:05,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363533109] [2023-08-04 02:31:05,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:31:05,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:31:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:31:05,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-04 02:31:05,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 317 flow. Second operand has 4 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 02:31:05,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:05,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-04 02:31:05,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:18,022 INFO L124 PetriNetUnfolderBase]: 117150/158647 cut-off events. [2023-08-04 02:31:18,022 INFO L125 PetriNetUnfolderBase]: For 97498/97498 co-relation queries the response was YES. [2023-08-04 02:31:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389215 conditions, 158647 events. 117150/158647 cut-off events. For 97498/97498 co-relation queries the response was YES. Maximal size of possible extension queue 5166. Compared 1122250 event pairs, 33563 based on Foata normal form. 0/128401 useless extension candidates. Maximal degree in co-relation 388602. Up to 74115 conditions per place. [2023-08-04 02:31:19,240 INFO L140 encePairwiseOnDemand]: 266/275 looper letters, 109 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-08-04 02:31:19,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 134 transitions, 779 flow [2023-08-04 02:31:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:31:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:31:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 02:31:19,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490909090909091 [2023-08-04 02:31:19,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 02:31:19,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 02:31:19,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:19,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 02:31:19,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:19,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:19,245 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:19,245 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 317 flow. Second operand 4 states and 604 transitions. [2023-08-04 02:31:19,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 134 transitions, 779 flow [2023-08-04 02:31:20,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 770 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:31:20,764 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 346 flow [2023-08-04 02:31:20,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-04 02:31:20,765 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2023-08-04 02:31:20,765 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 346 flow [2023-08-04 02:31:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 02:31:20,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:20,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1] [2023-08-04 02:31:20,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 02:31:20,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:20,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash -875786392, now seen corresponding path program 1 times [2023-08-04 02:31:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:20,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033700430] [2023-08-04 02:31:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:31:20,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033700430] [2023-08-04 02:31:20,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033700430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:20,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:31:20,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:31:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982263504] [2023-08-04 02:31:20,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:20,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:31:20,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:31:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:31:20,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-04 02:31:20,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:20,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:20,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-04 02:31:20,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:32:00,438 INFO L124 PetriNetUnfolderBase]: 369230/509376 cut-off events. [2023-08-04 02:32:00,439 INFO L125 PetriNetUnfolderBase]: For 446892/477556 co-relation queries the response was YES. [2023-08-04 02:32:02,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337792 conditions, 509376 events. 369230/509376 cut-off events. For 446892/477556 co-relation queries the response was YES. Maximal size of possible extension queue 13545. Compared 4124287 event pairs, 116284 based on Foata normal form. 45896/525857 useless extension candidates. Maximal degree in co-relation 1336383. Up to 254343 conditions per place. [2023-08-04 02:32:04,579 INFO L140 encePairwiseOnDemand]: 266/275 looper letters, 103 selfloop transitions, 7 changer transitions 0/130 dead transitions. [2023-08-04 02:32:04,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 770 flow [2023-08-04 02:32:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:32:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:32:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 02:32:04,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445454545454546 [2023-08-04 02:32:04,581 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 02:32:04,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 02:32:04,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:32:04,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 02:32:04,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 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 02:32:04,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:04,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:04,584 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 346 flow. Second operand 4 states and 599 transitions. [2023-08-04 02:32:04,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 770 flow [2023-08-04 02:32:09,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:32:09,507 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 392 flow [2023-08-04 02:32:09,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2023-08-04 02:32:09,508 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 31 predicate places. [2023-08-04 02:32:09,508 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 392 flow [2023-08-04 02:32:09,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:09,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:32:09,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2023-08-04 02:32:09,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 02:32:09,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:32:09,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:32:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1150135109, now seen corresponding path program 1 times [2023-08-04 02:32:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:32:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861393330] [2023-08-04 02:32:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:32:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:32:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:32:09,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861393330] [2023-08-04 02:32:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861393330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:32:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449615342] [2023-08-04 02:32:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:32:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:32:09,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:32:09,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:32:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:09,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 02:32:09,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:32:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:32:09,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:32:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:32:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449615342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:32:10,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:32:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 02:32:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605145786] [2023-08-04 02:32:10,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:32:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:32:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:32:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:32:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:32:10,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 275 [2023-08-04 02:32:10,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:10,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:32:10,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 275 [2023-08-04 02:32:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:34:12,228 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([798] L75-->L76-1: Formula: (not (= (mod v_~d2~0_83 256) 0)) InVars {~d2~0=v_~d2~0_83} OutVars{thread2Thread2of2ForFork1_#t~nondet4=|v_thread2Thread2of2ForFork1_#t~nondet4_32|, ~d2~0=v_~d2~0_83} AuxVars[] AssignedVars[thread2Thread2of2ForFork1_#t~nondet4][148], [Black: 283#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 992#(= ~g1~0 1), Black: 584#true, 1014#(not (= (* (div ~d2~0 256) 256) ~d2~0)), 587#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 423#(<= |ULTIMATE.start_main_~asdf~1#1| 1), thread2Thread1of2ForFork1InUse, 63#L54-2true, 53#L97-3true, 1008#(and (<= 0 ~d1~0) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 997#(= ~g2~0 1), 108#L75true, thread1Thread1of2ForFork0InUse, Black: 1002#(= ~d2~0 1), Black: 170#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 1007#(not (= (* 256 (div ~d1~0 256)) ~d1~0)), Black: 145#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 420#true, Black: 277#(<= |ULTIMATE.start_main_~asdf~3#1| 0), Black: 1015#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 775#(<= |ULTIMATE.start_main_~asdf~3#1| 1), Black: 216#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 126#L76-1true, 1019#true]) [2023-08-04 02:34:12,229 INFO L294 olderBase$Statistics]: this new event has 60 ancestors and is cut-off event [2023-08-04 02:34:12,229 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 02:34:12,229 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 02:34:12,229 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 02:34:12,230 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([865] L75-->L76-2: Formula: (and (not (= (mod |v_thread2Thread1of2ForFork1_#t~nondet4_36| 256) 0)) (not (= (mod v_~d2~0_89 256) 0))) InVars {~d2~0=v_~d2~0_89} OutVars{thread2Thread1of2ForFork1_#t~nondet4=|v_thread2Thread1of2ForFork1_#t~nondet4_36|, ~d2~0=v_~d2~0_89} AuxVars[] AssignedVars[thread2Thread1of2ForFork1_#t~nondet4][147], [Black: 283#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 992#(= ~g1~0 1), Black: 584#true, 1014#(not (= (* (div ~d2~0 256) 256) ~d2~0)), 587#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 423#(<= |ULTIMATE.start_main_~asdf~1#1| 1), thread2Thread1of2ForFork1InUse, 88#L76-2true, 63#L54-2true, 6#L75true, 53#L97-3true, 1008#(and (<= 0 ~d1~0) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 997#(= ~g2~0 1), thread1Thread1of2ForFork0InUse, Black: 1002#(= ~d2~0 1), Black: 170#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 1007#(not (= (* 256 (div ~d1~0 256)) ~d1~0)), Black: 145#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 420#true, Black: 277#(<= |ULTIMATE.start_main_~asdf~3#1| 0), Black: 1015#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 775#(<= |ULTIMATE.start_main_~asdf~3#1| 1), Black: 216#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 1019#true]) [2023-08-04 02:34:12,230 INFO L294 olderBase$Statistics]: this new event has 60 ancestors and is cut-off event [2023-08-04 02:34:12,230 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 02:34:12,230 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-04 02:34:12,230 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event