/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:51:23,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:51:23,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:51:23,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:51:23,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:51:23,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:51:23,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:51:23,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:51:23,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:51:23,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:51:23,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:51:23,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:51:23,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:51:23,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:51:23,802 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:51:23,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:51:23,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:51:23,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:51:23,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:51:23,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:51:23,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:51:23,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:51:23,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:51:23,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:51:23,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:51:23,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:51:23,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:51:23,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:51:23,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:51:23,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:51:23,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:51:23,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:51:23,808 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:51:23,809 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:51:23,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:51:23,809 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:51:23,809 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:51:24,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:51:24,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:51:24,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:51:24,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:51:24,062 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:51:24,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i [2023-08-04 06:51:25,174 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:51:25,398 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:51:25,399 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i [2023-08-04 06:51:25,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65347d9ef/33df4ad4835f438088a1f41a1ce9f817/FLAG7001ac25a [2023-08-04 06:51:25,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65347d9ef/33df4ad4835f438088a1f41a1ce9f817 [2023-08-04 06:51:25,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:51:25,436 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:51:25,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:51:25,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:51:25,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:51:25,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:25,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c743824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25, skipping insertion in model container [2023-08-04 06:51:25,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:25,487 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:51:25,647 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i[945,958] [2023-08-04 06:51:25,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:51:25,842 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:51:25,853 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i[945,958] [2023-08-04 06:51:25,872 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:51:25,874 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:51:25,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:51:25,930 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:51:25,931 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:51:25,937 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:51:25,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25 WrapperNode [2023-08-04 06:51:25,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:51:25,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:51:25,940 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:51:25,940 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:51:25,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:25,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,001 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-04 06:51:26,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:51:26,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:51:26,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:51:26,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:51:26,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,021 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:51:26,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:51:26,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:51:26,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:51:26,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (1/1) ... [2023-08-04 06:51:26,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:51:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:26,078 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 06:51:26,105 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 06:51:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:51:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:51:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:51:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:51:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:51:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:51:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:51:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:51:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:51:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:51:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:51:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:51:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:51:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:51:26,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:51:26,127 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 06:51:26,288 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:51:26,289 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:51:26,456 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:51:26,462 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:51:26,462 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:51:26,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:51:26 BoogieIcfgContainer [2023-08-04 06:51:26,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:51:26,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:51:26,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:51:26,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:51:26,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:51:25" (1/3) ... [2023-08-04 06:51:26,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4be4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:51:26, skipping insertion in model container [2023-08-04 06:51:26,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:51:25" (2/3) ... [2023-08-04 06:51:26,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4be4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:51:26, skipping insertion in model container [2023-08-04 06:51:26,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:51:26" (3/3) ... [2023-08-04 06:51:26,471 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe012_tso_bound2.i [2023-08-04 06:51:26,478 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:51:26,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:51:26,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:51:26,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:51:26,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:51:26,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 06:51:26,725 INFO L124 PetriNetUnfolderBase]: 30/415 cut-off events. [2023-08-04 06:51:26,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 415 events. 30/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1860 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-08-04 06:51:26,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 06:51:26,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 193 flow [2023-08-04 06:51:26,742 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:51:26,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 193 flow [2023-08-04 06:51:26,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 193 flow [2023-08-04 06:51:26,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 193 flow [2023-08-04 06:51:26,807 INFO L124 PetriNetUnfolderBase]: 22/312 cut-off events. [2023-08-04 06:51:26,808 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:26,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 312 events. 22/312 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1251 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 190. Up to 16 conditions per place. [2023-08-04 06:51:26,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-08-04 06:51:28,727 INFO L134 LiptonReduction]: Checked pairs total: 2829 [2023-08-04 06:51:28,727 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 06:51:28,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:51:28,753 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;@2ef01859, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:51:28,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:51:28,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:51:28,758 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 06:51:28,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:28,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:51:28,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:28,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash 356569683, now seen corresponding path program 1 times [2023-08-04 06:51:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555206575] [2023-08-04 06:51:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:29,056 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 06:51:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555206575] [2023-08-04 06:51:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555206575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:51:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:51:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414255806] [2023-08-04 06:51:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:29,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:29,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:51:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 181 [2023-08-04 06:51:29,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 181 [2023-08-04 06:51:29,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:29,245 INFO L124 PetriNetUnfolderBase]: 400/736 cut-off events. [2023-08-04 06:51:29,245 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:51:29,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 736 events. 400/736 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3724 event pairs, 310 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1432. Up to 668 conditions per place. [2023-08-04 06:51:29,252 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 20 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 06:51:29,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 06:51:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-04 06:51:29,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56353591160221 [2023-08-04 06:51:29,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-04 06:51:29,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-04 06:51:29,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:29,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-04 06:51:29,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,280 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 55 flow. Second operand 3 states and 306 transitions. [2023-08-04 06:51:29,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 06:51:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:51:29,283 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 63 flow [2023-08-04 06:51:29,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 06:51:29,287 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 06:51:29,288 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 63 flow [2023-08-04 06:51:29,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:29,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:51:29,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:29,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -974272433, now seen corresponding path program 1 times [2023-08-04 06:51:29,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:29,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71901531] [2023-08-04 06:51:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:29,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:29,387 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 06:51:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71901531] [2023-08-04 06:51:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71901531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585080091] [2023-08-04 06:51:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:29,391 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 06:51:29,403 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 06:51:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:29,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:51:29,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:29,507 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 06:51:29,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:51:29,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585080091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:29,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:51:29,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:51:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127833785] [2023-08-04 06:51:29,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:29,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:29,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:29,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 181 [2023-08-04 06:51:29,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:29,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 181 [2023-08-04 06:51:29,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:29,591 INFO L124 PetriNetUnfolderBase]: 338/602 cut-off events. [2023-08-04 06:51:29,592 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 06:51:29,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 602 events. 338/602 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2824 event pairs, 202 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1182. Up to 529 conditions per place. [2023-08-04 06:51:29,595 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 22 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 06:51:29,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 123 flow [2023-08-04 06:51:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-08-04 06:51:29,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.567219152854512 [2023-08-04 06:51:29,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-08-04 06:51:29,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-08-04 06:51:29,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:29,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-08-04 06:51:29,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,602 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 63 flow. Second operand 3 states and 308 transitions. [2023-08-04 06:51:29,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 123 flow [2023-08-04 06:51:29,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 119 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:51:29,603 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 67 flow [2023-08-04 06:51:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-04 06:51:29,604 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-04 06:51:29,604 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 67 flow [2023-08-04 06:51:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:29,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:29,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:29,616 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 06:51:29,810 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 06:51:29,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:29,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 747984146, now seen corresponding path program 1 times [2023-08-04 06:51:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:29,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603348001] [2023-08-04 06:51:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:29,897 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 06:51:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603348001] [2023-08-04 06:51:29,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603348001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:29,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196928445] [2023-08-04 06:51:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:29,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:29,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:29,905 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 06:51:29,931 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 06:51:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:30,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:51:30,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:30,014 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 06:51:30,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:51:30,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196928445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:30,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:51:30,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:51:30,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036154070] [2023-08-04 06:51:30,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:30,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:30,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:30,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:30,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 181 [2023-08-04 06:51:30,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:30,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 181 [2023-08-04 06:51:30,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:30,113 INFO L124 PetriNetUnfolderBase]: 314/532 cut-off events. [2023-08-04 06:51:30,113 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 06:51:30,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 532 events. 314/532 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2204 event pairs, 209 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 1097. Up to 407 conditions per place. [2023-08-04 06:51:30,116 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 24 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 06:51:30,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 135 flow [2023-08-04 06:51:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-04 06:51:30,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570902394106814 [2023-08-04 06:51:30,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-04 06:51:30,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-04 06:51:30,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:30,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-04 06:51:30,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,125 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 67 flow. Second operand 3 states and 310 transitions. [2023-08-04 06:51:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 135 flow [2023-08-04 06:51:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:51:30,127 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 71 flow [2023-08-04 06:51:30,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-04 06:51:30,128 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-04 06:51:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 71 flow [2023-08-04 06:51:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:30,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:30,137 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 06:51:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 06:51:30,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:30,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 895297528, now seen corresponding path program 1 times [2023-08-04 06:51:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460230439] [2023-08-04 06:51:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:30,415 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 06:51:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460230439] [2023-08-04 06:51:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460230439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599601765] [2023-08-04 06:51:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:30,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:30,421 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 06:51:30,424 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 06:51:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:30,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:51:30,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:30,535 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 06:51:30,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:51:30,555 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 06:51:30,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599601765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:51:30,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:51:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:51:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369889219] [2023-08-04 06:51:30,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:51:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:51:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:30,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:51:30,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:30,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 181 [2023-08-04 06:51:30,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:30,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 181 [2023-08-04 06:51:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:30,588 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:51:30,591 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:51:30,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:51:30,595 INFO L140 encePairwiseOnDemand]: 178/181 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:51:30,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:51:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:51:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:51:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2023-08-04 06:51:30,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276243093922652 [2023-08-04 06:51:30,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2023-08-04 06:51:30,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2023-08-04 06:51:30,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:30,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2023-08-04 06:51:30,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,602 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,602 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 71 flow. Second operand 4 states and 382 transitions. [2023-08-04 06:51:30,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:51:30,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:51:30,603 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:51:30,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 06:51:30,604 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -12 predicate places. [2023-08-04 06:51:30,604 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:51:30,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:30,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:51:30,619 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 06:51:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:30,814 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:51:30,815 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:51:30,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 06:51:30,853 INFO L124 PetriNetUnfolderBase]: 30/415 cut-off events. [2023-08-04 06:51:30,854 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:30,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 415 events. 30/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1860 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-08-04 06:51:30,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 06:51:30,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 79 transitions, 173 flow [2023-08-04 06:51:30,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:51:30,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 79 transitions, 173 flow [2023-08-04 06:51:30,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 79 transitions, 173 flow [2023-08-04 06:51:30,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 79 transitions, 173 flow [2023-08-04 06:51:30,873 INFO L124 PetriNetUnfolderBase]: 6/191 cut-off events. [2023-08-04 06:51:30,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:30,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 191 events. 6/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 591 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-04 06:51:30,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 06:51:32,348 INFO L134 LiptonReduction]: Checked pairs total: 2199 [2023-08-04 06:51:32,349 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-04 06:51:32,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:51:32,351 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;@2ef01859, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:51:32,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:51:32,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:51:32,353 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 06:51:32,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:32,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:32,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:51:32,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:51:32,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -33113604, now seen corresponding path program 1 times [2023-08-04 06:51:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293210697] [2023-08-04 06:51:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:51:32,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:51:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:51:32,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:51:32,387 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:51:32,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:51:32,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:51:32,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:51:32,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:51:32,388 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:51:32,389 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:51:32,389 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:51:32,389 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:51:32,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:51:32,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 06:51:32,507 INFO L124 PetriNetUnfolderBase]: 93/1305 cut-off events. [2023-08-04 06:51:32,508 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:51:32,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1305 events. 93/1305 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8899 event pairs, 0 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 946. Up to 54 conditions per place. [2023-08-04 06:51:32,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 06:51:32,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 113 transitions, 250 flow [2023-08-04 06:51:32,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:51:32,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 113 transitions, 250 flow [2023-08-04 06:51:32,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 113 transitions, 250 flow [2023-08-04 06:51:32,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 113 transitions, 250 flow [2023-08-04 06:51:32,584 INFO L124 PetriNetUnfolderBase]: 66/968 cut-off events. [2023-08-04 06:51:32,584 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:51:32,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 968 events. 66/968 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6028 event pairs, 0 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 718. Up to 54 conditions per place. [2023-08-04 06:51:32,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 06:51:34,341 INFO L134 LiptonReduction]: Checked pairs total: 8190 [2023-08-04 06:51:34,341 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-04 06:51:34,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:51:34,343 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;@2ef01859, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:51:34,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:51:34,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:51:34,345 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-04 06:51:34,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:51:34,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:34,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 06:51:34,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:34,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 20521054, now seen corresponding path program 1 times [2023-08-04 06:51:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:34,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9565573] [2023-08-04 06:51:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:34,395 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 06:51:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9565573] [2023-08-04 06:51:34,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9565573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:34,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:51:34,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:51:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766870098] [2023-08-04 06:51:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:51:34,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-04 06:51:34,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:34,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:34,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-04 06:51:34,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:37,977 INFO L124 PetriNetUnfolderBase]: 33046/48161 cut-off events. [2023-08-04 06:51:37,977 INFO L125 PetriNetUnfolderBase]: For 1497/1497 co-relation queries the response was YES. [2023-08-04 06:51:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93552 conditions, 48161 events. 33046/48161 cut-off events. For 1497/1497 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 341373 event pairs, 26064 based on Foata normal form. 0/45320 useless extension candidates. Maximal degree in co-relation 26620. Up to 43520 conditions per place. [2023-08-04 06:51:38,289 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 06:51:38,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 06:51:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 06:51:38,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860979462875198 [2023-08-04 06:51:38,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 06:51:38,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 06:51:38,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:38,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 06:51:38,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:38,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:38,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:38,296 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 371 transitions. [2023-08-04 06:51:38,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 06:51:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:51:38,300 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 06:51:38,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 06:51:38,302 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 06:51:38,302 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 06:51:38,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:51:38,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:38,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1341808804, now seen corresponding path program 1 times [2023-08-04 06:51:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:38,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22821360] [2023-08-04 06:51:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:38,352 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 06:51:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22821360] [2023-08-04 06:51:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22821360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481248858] [2023-08-04 06:51:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:38,356 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 06:51:38,382 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 06:51:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:38,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:51:38,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:38,437 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 06:51:38,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:51:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481248858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:38,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:51:38,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:51:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010897821] [2023-08-04 06:51:38,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:38,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:38,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-04 06:51:38,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:38,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:38,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-04 06:51:38,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:41,153 INFO L124 PetriNetUnfolderBase]: 31406/45017 cut-off events. [2023-08-04 06:51:41,153 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 06:51:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87898 conditions, 45017 events. 31406/45017 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 310406 event pairs, 24928 based on Foata normal form. 0/42785 useless extension candidates. Maximal degree in co-relation 87861. Up to 40987 conditions per place. [2023-08-04 06:51:41,405 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 06:51:41,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 06:51:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 06:51:41,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5908372827804107 [2023-08-04 06:51:41,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 06:51:41,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 06:51:41,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:41,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 06:51:41,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:41,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:41,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:41,411 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 374 transitions. [2023-08-04 06:51:41,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 06:51:41,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:51:41,413 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 06:51:41,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 06:51:41,414 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 06:51:41,414 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 06:51:41,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:41,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:41,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:41,420 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 06:51:41,619 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 06:51:41,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:41,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 353105477, now seen corresponding path program 1 times [2023-08-04 06:51:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131369491] [2023-08-04 06:51:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 06:51:41,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:41,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131369491] [2023-08-04 06:51:41,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131369491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:41,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424160125] [2023-08-04 06:51:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:41,675 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 06:51:41,677 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 06:51:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:41,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:51:41,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:41,748 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 06:51:41,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:51:41,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424160125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:41,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:51:41,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:51:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482426018] [2023-08-04 06:51:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:41,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:41,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-04 06:51:41,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:41,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:41,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-04 06:51:41,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:44,353 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 06:51:44,353 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 06:51:44,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290436 event pairs, 23582 based on Foata normal form. 0/41627 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 06:51:44,578 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 06:51:44,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 06:51:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 06:51:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5971563981042654 [2023-08-04 06:51:44,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 06:51:44,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 06:51:44,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:44,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 06:51:44,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:44,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:44,584 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 378 transitions. [2023-08-04 06:51:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 06:51:44,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:51:44,588 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 06:51:44,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-04 06:51:44,589 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 06:51:44,589 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 06:51:44,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:44,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:44,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:44,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 06:51:44,794 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 06:51:44,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:44,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:44,795 INFO L85 PathProgramCache]: Analyzing trace with hash 171674635, now seen corresponding path program 1 times [2023-08-04 06:51:44,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:44,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78410485] [2023-08-04 06:51:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:44,843 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 06:51:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78410485] [2023-08-04 06:51:44,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78410485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58497169] [2023-08-04 06:51:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:44,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:44,847 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 06:51:44,849 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 06:51:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:44,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:51:44,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:44,945 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 06:51:44,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:51:44,965 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 06:51:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58497169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:51:44,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:51:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:51:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847309250] [2023-08-04 06:51:44,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:51:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:51:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:51:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:44,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-04 06:51:44,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:44,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:44,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-04 06:51:44,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:47,126 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 06:51:47,127 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 06:51:47,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 214040 event pairs, 14820 based on Foata normal form. 3/33869 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 06:51:47,354 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 06:51:47,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 06:51:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:51:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:51:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 06:51:47,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722748815165877 [2023-08-04 06:51:47,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 06:51:47,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 06:51:47,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:47,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 06:51:47,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:47,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:47,359 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:47,359 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 483 transitions. [2023-08-04 06:51:47,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 06:51:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:51:47,367 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 06:51:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 06:51:47,369 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 06:51:47,369 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 06:51:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:47,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:47,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:47,378 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 06:51:47,575 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 06:51:47,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:47,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash 496649454, now seen corresponding path program 1 times [2023-08-04 06:51:47,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:47,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686759915] [2023-08-04 06:51:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:51:47,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:47,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686759915] [2023-08-04 06:51:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686759915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457554991] [2023-08-04 06:51:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:47,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:47,630 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 06:51:47,654 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 06:51:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:47,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:51:47,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:51:47,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:51:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:51:47,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457554991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:51:47,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:51:47,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:51:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088175266] [2023-08-04 06:51:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:51:47,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:51:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:51:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:47,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-04 06:51:47,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:47,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:47,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-04 06:51:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:49,496 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 06:51:49,496 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 06:51:49,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160180 event pairs, 11902 based on Foata normal form. 27/26512 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 06:51:49,659 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 06:51:49,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 06:51:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:51:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:51:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-04 06:51:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817535545023697 [2023-08-04 06:51:49,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-04 06:51:49,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-04 06:51:49,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:49,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-04 06:51:49,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:49,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:49,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:49,666 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 491 transitions. [2023-08-04 06:51:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 06:51:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:51:49,673 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 06:51:49,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 06:51:49,674 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 06:51:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 06:51:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:51:49,683 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 06:51:49,880 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 06:51:49,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:49,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1323297398, now seen corresponding path program 1 times [2023-08-04 06:51:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135801055] [2023-08-04 06:51:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:51:49,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135801055] [2023-08-04 06:51:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135801055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:51:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371646391] [2023-08-04 06:51:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:49,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:51:49,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:51:49,941 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 06:51:49,964 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 06:51:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:50,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:51:50,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:51:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:51:50,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:51:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:51:50,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371646391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:51:50,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:51:50,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:51:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449999051] [2023-08-04 06:51:50,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:51:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:51:50,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:51:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:51:50,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-04 06:51:50,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:50,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:50,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-04 06:51:50,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:51,606 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 06:51:51,607 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 06:51:51,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 128055 event pairs, 6886 based on Foata normal form. 243/23452 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 06:51:51,738 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 06:51:51,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 06:51:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:51:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:51:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-04 06:51:51,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912322274881516 [2023-08-04 06:51:51,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-04 06:51:51,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-04 06:51:51,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:51,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-04 06:51:51,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:51,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:51,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:51,744 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 499 transitions. [2023-08-04 06:51:51,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 06:51:51,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:51:51,748 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 06:51:51,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-04 06:51:51,749 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 06:51:51,749 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 06:51:51,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:51,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:51,749 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] [2023-08-04 06:51:51,757 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 06:51:51,954 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 06:51:51,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:51,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1816783043, now seen corresponding path program 1 times [2023-08-04 06:51:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635746180] [2023-08-04 06:51:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:51:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635746180] [2023-08-04 06:51:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635746180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:51:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:51:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084918675] [2023-08-04 06:51:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:52,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:51:52,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:51:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:51:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 211 [2023-08-04 06:51:52,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:52,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:52,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 211 [2023-08-04 06:51:52,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:54,569 INFO L124 PetriNetUnfolderBase]: 26842/36304 cut-off events. [2023-08-04 06:51:54,569 INFO L125 PetriNetUnfolderBase]: For 18476/18476 co-relation queries the response was YES. [2023-08-04 06:51:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81241 conditions, 36304 events. 26842/36304 cut-off events. For 18476/18476 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 218163 event pairs, 10771 based on Foata normal form. 9/36282 useless extension candidates. Maximal degree in co-relation 81150. Up to 33886 conditions per place. [2023-08-04 06:51:54,776 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 54 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-08-04 06:51:54,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 396 flow [2023-08-04 06:51:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:51:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:51:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 06:51:54,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5924170616113744 [2023-08-04 06:51:54,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 06:51:54,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 06:51:54,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:51:54,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 06:51:54,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:54,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:54,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:54,780 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 375 transitions. [2023-08-04 06:51:54,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 396 flow [2023-08-04 06:51:54,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 382 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:51:54,788 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 184 flow [2023-08-04 06:51:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 06:51:54,788 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 06:51:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 184 flow [2023-08-04 06:51:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:51:54,789 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] [2023-08-04 06:51:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 06:51:54,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:51:54,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:51:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -485700032, now seen corresponding path program 1 times [2023-08-04 06:51:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:51:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602326077] [2023-08-04 06:51:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:51:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:51:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:51:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:51:54,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:51:54,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602326077] [2023-08-04 06:51:54,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602326077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:51:54,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:51:54,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:51:54,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171029977] [2023-08-04 06:51:54,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:51:54,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:51:54,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:51:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:51:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:51:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 211 [2023-08-04 06:51:54,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:51:54,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:51:54,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 211 [2023-08-04 06:51:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:51:59,676 INFO L124 PetriNetUnfolderBase]: 64510/81325 cut-off events. [2023-08-04 06:51:59,677 INFO L125 PetriNetUnfolderBase]: For 37846/37846 co-relation queries the response was YES. [2023-08-04 06:51:59,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195507 conditions, 81325 events. 64510/81325 cut-off events. For 37846/37846 co-relation queries the response was YES. Maximal size of possible extension queue 2906. Compared 445847 event pairs, 7927 based on Foata normal form. 1008/82301 useless extension candidates. Maximal degree in co-relation 124722. Up to 46333 conditions per place. [2023-08-04 06:52:00,446 INFO L140 encePairwiseOnDemand]: 201/211 looper letters, 93 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2023-08-04 06:52:00,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 117 transitions, 675 flow [2023-08-04 06:52:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:52:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:52:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2023-08-04 06:52:00,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895734597156398 [2023-08-04 06:52:00,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 622 transitions. [2023-08-04 06:52:00,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 622 transitions. [2023-08-04 06:52:00,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:00,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 622 transitions. [2023-08-04 06:52:00,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:00,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:00,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:00,452 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 184 flow. Second operand 5 states and 622 transitions. [2023-08-04 06:52:00,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 117 transitions, 675 flow [2023-08-04 06:52:00,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:00,474 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 330 flow [2023-08-04 06:52:00,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2023-08-04 06:52:00,474 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-04 06:52:00,474 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 330 flow [2023-08-04 06:52:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:00,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:00,475 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] [2023-08-04 06:52:00,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:52:00,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:00,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -374565838, now seen corresponding path program 1 times [2023-08-04 06:52:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84821378] [2023-08-04 06:52:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 06:52:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:00,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84821378] [2023-08-04 06:52:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84821378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:00,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751308578] [2023-08-04 06:52:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:00,640 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 06:52:00,672 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 06:52:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:00,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 06:52:00,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:52:00,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:52:00,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751308578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:00,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:52:00,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2] total 3 [2023-08-04 06:52:00,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129391652] [2023-08-04 06:52:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:52:00,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 211 [2023-08-04 06:52:00,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:00,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:00,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 211 [2023-08-04 06:52:00,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:05,285 INFO L124 PetriNetUnfolderBase]: 44865/60362 cut-off events. [2023-08-04 06:52:05,286 INFO L125 PetriNetUnfolderBase]: For 83519/86030 co-relation queries the response was YES. [2023-08-04 06:52:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188596 conditions, 60362 events. 44865/60362 cut-off events. For 83519/86030 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 381734 event pairs, 30108 based on Foata normal form. 846/59503 useless extension candidates. Maximal degree in co-relation 188509. Up to 49805 conditions per place. [2023-08-04 06:52:05,866 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 66 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2023-08-04 06:52:05,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 633 flow [2023-08-04 06:52:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-04 06:52:05,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208530805687204 [2023-08-04 06:52:05,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-04 06:52:05,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-04 06:52:05,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:05,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-04 06:52:05,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:05,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:05,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:05,871 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 330 flow. Second operand 3 states and 393 transitions. [2023-08-04 06:52:05,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 633 flow [2023-08-04 06:52:05,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 616 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:05,905 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 376 flow [2023-08-04 06:52:05,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-04 06:52:05,905 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2023-08-04 06:52:05,906 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 376 flow [2023-08-04 06:52:05,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:05,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:05,906 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] [2023-08-04 06:52:05,911 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 06:52:06,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 06:52:06,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:06,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash -922350358, now seen corresponding path program 1 times [2023-08-04 06:52:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:06,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776797011] [2023-08-04 06:52:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 06:52:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776797011] [2023-08-04 06:52:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776797011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937904469] [2023-08-04 06:52:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:06,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:06,286 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 06:52:06,290 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 06:52:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:06,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 06:52:06,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:52:06,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:52:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937904469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:06,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:52:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-04 06:52:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925388461] [2023-08-04 06:52:06,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 06:52:06,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 211 [2023-08-04 06:52:06,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:06,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:06,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 211 [2023-08-04 06:52:06,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:10,734 INFO L124 PetriNetUnfolderBase]: 41809/57006 cut-off events. [2023-08-04 06:52:10,734 INFO L125 PetriNetUnfolderBase]: For 89308/91018 co-relation queries the response was YES. [2023-08-04 06:52:11,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179004 conditions, 57006 events. 41809/57006 cut-off events. For 89308/91018 co-relation queries the response was YES. Maximal size of possible extension queue 2440. Compared 364376 event pairs, 6803 based on Foata normal form. 792/56839 useless extension candidates. Maximal degree in co-relation 110163. Up to 41119 conditions per place. [2023-08-04 06:52:11,288 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 60 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2023-08-04 06:52:11,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 621 flow [2023-08-04 06:52:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-04 06:52:11,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050552922590837 [2023-08-04 06:52:11,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-04 06:52:11,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-04 06:52:11,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:11,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-04 06:52:11,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:11,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:11,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:11,293 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 376 flow. Second operand 3 states and 383 transitions. [2023-08-04 06:52:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 621 flow [2023-08-04 06:52:11,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:11,364 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 432 flow [2023-08-04 06:52:11,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-08-04 06:52:11,364 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 25 predicate places. [2023-08-04 06:52:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 432 flow [2023-08-04 06:52:11,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:11,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:11,365 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] [2023-08-04 06:52:11,376 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 06:52:11,570 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,SelfDestructingSolverStorable14 [2023-08-04 06:52:11,571 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:11,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash 970769577, now seen corresponding path program 1 times [2023-08-04 06:52:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19873644] [2023-08-04 06:52:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19873644] [2023-08-04 06:52:11,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19873644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242174315] [2023-08-04 06:52:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:11,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:11,979 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 06:52:11,982 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 06:52:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:12,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 06:52:12,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:52:12,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:52:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242174315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:12,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:52:12,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-04 06:52:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174310982] [2023-08-04 06:52:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:52:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:52:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 06:52:12,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 211 [2023-08-04 06:52:12,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:12,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:12,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 211 [2023-08-04 06:52:12,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:23,458 INFO L124 PetriNetUnfolderBase]: 115428/152756 cut-off events. [2023-08-04 06:52:23,458 INFO L125 PetriNetUnfolderBase]: For 397390/403837 co-relation queries the response was YES. [2023-08-04 06:52:24,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489457 conditions, 152756 events. 115428/152756 cut-off events. For 397390/403837 co-relation queries the response was YES. Maximal size of possible extension queue 6667. Compared 1024764 event pairs, 15977 based on Foata normal form. 5450/153611 useless extension candidates. Maximal degree in co-relation 220941. Up to 60237 conditions per place. [2023-08-04 06:52:25,088 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 113 selfloop transitions, 15 changer transitions 0/143 dead transitions. [2023-08-04 06:52:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 143 transitions, 1163 flow [2023-08-04 06:52:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:52:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:52:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-08-04 06:52:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066350710900474 [2023-08-04 06:52:25,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-08-04 06:52:25,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-08-04 06:52:25,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:25,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-08-04 06:52:25,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:25,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:25,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:25,093 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 432 flow. Second operand 4 states and 512 transitions. [2023-08-04 06:52:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 143 transitions, 1163 flow [2023-08-04 06:52:25,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 143 transitions, 1150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:25,164 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 616 flow [2023-08-04 06:52:25,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=616, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2023-08-04 06:52:25,165 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2023-08-04 06:52:25,165 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 616 flow [2023-08-04 06:52:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:25,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:25,165 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] [2023-08-04 06:52:25,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 06:52:25,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 06:52:25,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:25,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:25,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1126039235, now seen corresponding path program 1 times [2023-08-04 06:52:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:25,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931599106] [2023-08-04 06:52:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931599106] [2023-08-04 06:52:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931599106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833232483] [2023-08-04 06:52:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:25,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:25,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:52:25,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 06:52:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:25,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 06:52:25,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:25,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:52:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:25,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833232483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:52:25,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:52:25,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-04 06:52:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21973373] [2023-08-04 06:52:25,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:52:25,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 06:52:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 06:52:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 06:52:25,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 211 [2023-08-04 06:52:25,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 616 flow. Second operand has 7 states, 7 states have (on average 118.42857142857143) internal successors, (829), 7 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:25,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:25,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 211 [2023-08-04 06:52:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:39,454 INFO L124 PetriNetUnfolderBase]: 132885/175436 cut-off events. [2023-08-04 06:52:39,454 INFO L125 PetriNetUnfolderBase]: For 532303/537366 co-relation queries the response was YES. [2023-08-04 06:52:40,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603104 conditions, 175436 events. 132885/175436 cut-off events. For 532303/537366 co-relation queries the response was YES. Maximal size of possible extension queue 7842. Compared 1207918 event pairs, 20199 based on Foata normal form. 3543/174280 useless extension candidates. Maximal degree in co-relation 283662. Up to 77276 conditions per place. [2023-08-04 06:52:40,909 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 97 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2023-08-04 06:52:40,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 1066 flow [2023-08-04 06:52:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:52:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:52:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-08-04 06:52:40,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007109004739336 [2023-08-04 06:52:40,911 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-08-04 06:52:40,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-08-04 06:52:40,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:40,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-08-04 06:52:40,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:40,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:40,913 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:40,913 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 616 flow. Second operand 4 states and 507 transitions. [2023-08-04 06:52:40,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 1066 flow [2023-08-04 06:52:41,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1049 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:41,067 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 668 flow [2023-08-04 06:52:41,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2023-08-04 06:52:41,067 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 33 predicate places. [2023-08-04 06:52:41,068 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 668 flow [2023-08-04 06:52:41,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.42857142857143) internal successors, (829), 7 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:41,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:41,068 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] [2023-08-04 06:52:41,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 06:52:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 06:52:41,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:41,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -512460428, now seen corresponding path program 1 times [2023-08-04 06:52:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:41,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024158421] [2023-08-04 06:52:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:52:41,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:41,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024158421] [2023-08-04 06:52:41,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024158421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:41,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:52:41,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:52:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217284963] [2023-08-04 06:52:41,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:41,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:41,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:52:41,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 211 [2023-08-04 06:52:41,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:41,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:41,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 211 [2023-08-04 06:52:41,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:53,897 INFO L124 PetriNetUnfolderBase]: 105611/139306 cut-off events. [2023-08-04 06:52:53,897 INFO L125 PetriNetUnfolderBase]: For 593375/604385 co-relation queries the response was YES. [2023-08-04 06:52:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510280 conditions, 139306 events. 105611/139306 cut-off events. For 593375/604385 co-relation queries the response was YES. Maximal size of possible extension queue 7219. Compared 930965 event pairs, 21874 based on Foata normal form. 3486/132123 useless extension candidates. Maximal degree in co-relation 267430. Up to 124656 conditions per place. [2023-08-04 06:52:55,164 INFO L140 encePairwiseOnDemand]: 203/211 looper letters, 117 selfloop transitions, 7 changer transitions 2/145 dead transitions. [2023-08-04 06:52:55,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 1409 flow [2023-08-04 06:52:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 06:52:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6034755134281201 [2023-08-04 06:52:55,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 06:52:55,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 06:52:55,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:55,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 06:52:55,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:55,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:55,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:55,168 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 668 flow. Second operand 3 states and 382 transitions. [2023-08-04 06:52:55,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 1409 flow [2023-08-04 06:52:55,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 145 transitions, 1391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:52:55,388 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 703 flow [2023-08-04 06:52:55,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=703, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2023-08-04 06:52:55,389 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2023-08-04 06:52:55,389 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 703 flow [2023-08-04 06:52:55,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:55,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:55,389 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] [2023-08-04 06:52:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 06:52:55,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:55,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1918808188, now seen corresponding path program 1 times [2023-08-04 06:52:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237873615] [2023-08-04 06:52:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 06:52:55,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237873615] [2023-08-04 06:52:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237873615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418616082] [2023-08-04 06:52:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:55,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:55,522 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:52:55,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 06:52:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:55,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-04 06:52:55,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:55,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:52:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:52:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418616082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:52:56,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:52:56,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 16 [2023-08-04 06:52:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100516782] [2023-08-04 06:52:56,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:52:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 06:52:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 06:52:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-08-04 06:52:56,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 211 [2023-08-04 06:52:56,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 703 flow. Second operand has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:56,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:56,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 211 [2023-08-04 06:52:56,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:53:26,672 INFO L124 PetriNetUnfolderBase]: 276683/352073 cut-off events. [2023-08-04 06:53:26,672 INFO L125 PetriNetUnfolderBase]: For 1108952/1108952 co-relation queries the response was YES. [2023-08-04 06:53:28,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371606 conditions, 352073 events. 276683/352073 cut-off events. For 1108952/1108952 co-relation queries the response was YES. Maximal size of possible extension queue 12377. Compared 2228477 event pairs, 5377 based on Foata normal form. 9240/361300 useless extension candidates. Maximal degree in co-relation 1371481. Up to 163665 conditions per place. [2023-08-04 06:53:29,659 INFO L140 encePairwiseOnDemand]: 192/211 looper letters, 405 selfloop transitions, 192 changer transitions 81/681 dead transitions. [2023-08-04 06:53:29,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 681 transitions, 6369 flow [2023-08-04 06:53:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 06:53:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 06:53:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1872 transitions. [2023-08-04 06:53:29,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545023696682464 [2023-08-04 06:53:29,664 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1872 transitions. [2023-08-04 06:53:29,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1872 transitions. [2023-08-04 06:53:29,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:53:29,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1872 transitions. [2023-08-04 06:53:29,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:29,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 211.0) internal successors, (3587), 17 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:29,673 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 211.0) internal successors, (3587), 17 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:29,673 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 703 flow. Second operand 16 states and 1872 transitions. [2023-08-04 06:53:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 681 transitions, 6369 flow [2023-08-04 06:53:31,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 681 transitions, 6342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:53:31,714 INFO L231 Difference]: Finished difference. Result has 110 places, 284 transitions, 2961 flow [2023-08-04 06:53:31,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2961, PETRI_PLACES=110, PETRI_TRANSITIONS=284} [2023-08-04 06:53:31,714 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2023-08-04 06:53:31,715 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 284 transitions, 2961 flow [2023-08-04 06:53:31,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.11764705882354) internal successors, (1668), 17 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:31,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:53:31,715 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 06:53:31,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 06:53:31,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:31,922 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:53:31,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:53:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1670651016, now seen corresponding path program 1 times [2023-08-04 06:53:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:53:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817521438] [2023-08-04 06:53:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:53:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 06:53:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:53:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817521438] [2023-08-04 06:53:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817521438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:53:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818514678] [2023-08-04 06:53:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:32,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:53:32,047 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:53:32,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 06:53:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:32,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 06:53:32,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:53:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 06:53:32,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:53:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 06:53:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818514678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:53:32,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:53:32,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 19 [2023-08-04 06:53:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218610704] [2023-08-04 06:53:32,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:53:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 06:53:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:53:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 06:53:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2023-08-04 06:53:32,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 211 [2023-08-04 06:53:32,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 284 transitions, 2961 flow. Second operand has 20 states, 20 states have (on average 97.55) internal successors, (1951), 20 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:32,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:53:32,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 211 [2023-08-04 06:53:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:01,826 INFO L124 PetriNetUnfolderBase]: 214274/272593 cut-off events. [2023-08-04 06:54:01,826 INFO L125 PetriNetUnfolderBase]: For 1743246/1743246 co-relation queries the response was YES. [2023-08-04 06:54:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413117 conditions, 272593 events. 214274/272593 cut-off events. For 1743246/1743246 co-relation queries the response was YES. Maximal size of possible extension queue 11338. Compared 1712501 event pairs, 3852 based on Foata normal form. 8208/280788 useless extension candidates. Maximal degree in co-relation 1412968. Up to 96489 conditions per place. [2023-08-04 06:54:04,621 INFO L140 encePairwiseOnDemand]: 193/211 looper letters, 493 selfloop transitions, 225 changer transitions 22/743 dead transitions. [2023-08-04 06:54:04,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 743 transitions, 8591 flow [2023-08-04 06:54:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 06:54:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 06:54:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2299 transitions. [2023-08-04 06:54:04,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54478672985782 [2023-08-04 06:54:04,626 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2299 transitions. [2023-08-04 06:54:04,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2299 transitions. [2023-08-04 06:54:04,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:04,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2299 transitions. [2023-08-04 06:54:04,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.95) internal successors, (2299), 20 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:04,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 211.0) internal successors, (4431), 21 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:04,636 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 211.0) internal successors, (4431), 21 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:04,637 INFO L175 Difference]: Start difference. First operand has 110 places, 284 transitions, 2961 flow. Second operand 20 states and 2299 transitions. [2023-08-04 06:54:04,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 743 transitions, 8591 flow [2023-08-04 06:56:02,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 743 transitions, 8275 flow, removed 136 selfloop flow, removed 2 redundant places. [2023-08-04 06:56:02,562 INFO L231 Difference]: Finished difference. Result has 134 places, 347 transitions, 3997 flow [2023-08-04 06:56:02,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3997, PETRI_PLACES=134, PETRI_TRANSITIONS=347} [2023-08-04 06:56:02,562 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2023-08-04 06:56:02,562 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 347 transitions, 3997 flow [2023-08-04 06:56:02,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.55) internal successors, (1951), 20 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:56:02,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:56:02,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:56:02,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 06:56:02,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:56:02,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:56:02,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:56:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash 543642632, now seen corresponding path program 1 times [2023-08-04 06:56:02,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:56:02,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796106271] [2023-08-04 06:56:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:56:02,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:56:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:56:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 06:56:02,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:56:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796106271] [2023-08-04 06:56:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796106271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:56:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725445176] [2023-08-04 06:56:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:56:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:56:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:56:02,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:56:02,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 06:56:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:56:03,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 06:56:03,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:56:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 06:56:03,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:56:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 06:56:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725445176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:56:03,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:56:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 16 [2023-08-04 06:56:03,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153276372] [2023-08-04 06:56:03,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:56:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 06:56:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:56:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 06:56:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-08-04 06:56:03,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 211 [2023-08-04 06:56:03,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 347 transitions, 3997 flow. Second operand has 17 states, 17 states have (on average 100.88235294117646) internal successors, (1715), 17 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:56:03,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:56:03,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 211 [2023-08-04 06:56:03,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:56:54,143 INFO L124 PetriNetUnfolderBase]: 251332/337412 cut-off events. [2023-08-04 06:56:54,143 INFO L125 PetriNetUnfolderBase]: For 2866459/2907184 co-relation queries the response was YES. [2023-08-04 06:56:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999144 conditions, 337412 events. 251332/337412 cut-off events. For 2866459/2907184 co-relation queries the response was YES. Maximal size of possible extension queue 18347. Compared 2532297 event pairs, 3301 based on Foata normal form. 13621/342361 useless extension candidates. Maximal degree in co-relation 1998979. Up to 134363 conditions per place. [2023-08-04 06:56:59,002 INFO L140 encePairwiseOnDemand]: 194/211 looper letters, 646 selfloop transitions, 327 changer transitions 205/1207 dead transitions. [2023-08-04 06:56:59,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1207 transitions, 15802 flow [2023-08-04 06:56:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-04 06:56:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-04 06:56:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3782 transitions. [2023-08-04 06:56:59,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431566853367801 [2023-08-04 06:56:59,010 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3782 transitions. [2023-08-04 06:56:59,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3782 transitions. [2023-08-04 06:56:59,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:56:59,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3782 transitions. [2023-08-04 06:56:59,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 114.60606060606061) internal successors, (3782), 33 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:56:59,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 211.0) internal successors, (7174), 34 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:56:59,028 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 211.0) internal successors, (7174), 34 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:56:59,028 INFO L175 Difference]: Start difference. First operand has 134 places, 347 transitions, 3997 flow. Second operand 33 states and 3782 transitions. [2023-08-04 06:56:59,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1207 transitions, 15802 flow Received shutdown request... [2023-08-04 07:04:38,836 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:04:38,836 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:04:39,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 07:04:39,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown