/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:53:36,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:53:36,397 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:53:36,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:53:36,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:53:36,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:53:36,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:53:36,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:53:36,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:53:36,428 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:53:36,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:53:36,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:53:36,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:53:36,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:53:36,430 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:53:36,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:53:36,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:53:36,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:53:36,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:53:36,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:53:36,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:53:36,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:53:36,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:53:36,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:53:36,433 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:53:36,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:53:36,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:53:36,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:53:36,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:53:36,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:53:36,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:53:36,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:53:36,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:53:36,620 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:53:36,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.opt_bound2.i [2023-08-03 16:53:37,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:53:37,693 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:53:37,693 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.opt_bound2.i [2023-08-03 16:53:37,703 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60f602d57/600dcd0d04b64e32b47a92d60e420ffe/FLAG043b252cd [2023-08-03 16:53:37,711 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60f602d57/600dcd0d04b64e32b47a92d60e420ffe [2023-08-03 16:53:37,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:53:37,713 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:53:37,714 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:53:37,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:53:37,721 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:53:37,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:53:37" (1/1) ... [2023-08-03 16:53:37,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1089c84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:37, skipping insertion in model container [2023-08-03 16:53:37,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:53:37" (1/1) ... [2023-08-03 16:53:37,759 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:53:37,858 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_mix001.opt_bound2.i[944,957] [2023-08-03 16:53:37,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:53:37,961 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:53:37,968 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_mix001.opt_bound2.i[944,957] [2023-08-03 16:53:37,973 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:53:37,974 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:53:37,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:53:38,014 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:53:38,014 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:53:38,018 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:53:38,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38 WrapperNode [2023-08-03 16:53:38,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:53:38,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:53:38,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:53:38,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:53:38,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,056 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 176 [2023-08-03 16:53:38,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:53:38,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:53:38,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:53:38,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:53:38,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,071 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,078 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:53:38,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:53:38,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:53:38,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:53:38,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (1/1) ... [2023-08-03 16:53:38,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:53:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:38,103 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) [2023-08-03 16:53:38,110 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 [2023-08-03 16:53:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:53:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 16:53:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:53:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:53:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:53:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 16:53:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 16:53:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 16:53:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 16:53:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 16:53:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 16:53:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:53:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 16:53:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:53:38,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:53:38,135 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 16:53:38,238 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:53:38,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:53:38,474 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:53:38,556 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:53:38,556 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 16:53:38,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:53:38 BoogieIcfgContainer [2023-08-03 16:53:38,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:53:38,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:53:38,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:53:38,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:53:38,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:53:37" (1/3) ... [2023-08-03 16:53:38,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b27d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:53:38, skipping insertion in model container [2023-08-03 16:53:38,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:38" (2/3) ... [2023-08-03 16:53:38,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b27d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:53:38, skipping insertion in model container [2023-08-03 16:53:38,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:53:38" (3/3) ... [2023-08-03 16:53:38,566 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix001.opt_bound2.i [2023-08-03 16:53:38,571 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:53:38,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:53:38,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 16:53:38,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:53:38,619 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:53:38,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,719 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 16:53:38,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:38,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2012 event pairs, 0 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-03 16:53:38,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,729 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:53:38,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 16:53:38,828 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 16:53:38,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:38,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2012 event pairs, 0 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-03 16:53:38,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 2774 [2023-08-03 16:53:41,625 INFO L134 LiptonReduction]: Checked pairs total: 7723 [2023-08-03 16:53:41,625 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-03 16:53:41,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:53:41,638 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;@15d18e68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:53:41,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 16:53:41,640 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:53:41,641 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-03 16:53:41,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:41,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:41,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 16:53:41,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 16:53:41,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 339223215, now seen corresponding path program 1 times [2023-08-03 16:53:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:41,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953885393] [2023-08-03 16:53:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:53:41,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:41,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953885393] [2023-08-03 16:53:41,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953885393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:41,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:41,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:53:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281459247] [2023-08-03 16:53:41,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:41,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:41,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 246 [2023-08-03 16:53:41,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:41,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:41,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 246 [2023-08-03 16:53:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:42,094 INFO L124 PetriNetUnfolderBase]: 1828/2948 cut-off events. [2023-08-03 16:53:42,094 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 16:53:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 2948 events. 1828/2948 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17827 event pairs, 1501 based on Foata normal form. 105/2556 useless extension candidates. Maximal degree in co-relation 5831. Up to 2807 conditions per place. [2023-08-03 16:53:42,107 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-03 16:53:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 153 flow [2023-08-03 16:53:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-03 16:53:42,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2023-08-03 16:53:42,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-03 16:53:42,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-03 16:53:42,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:42,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-03 16:53:42,123 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) [2023-08-03 16:53:42,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:42,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:42,127 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 87 flow. Second operand 3 states and 378 transitions. [2023-08-03 16:53:42,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 153 flow [2023-08-03 16:53:42,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:53:42,130 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 93 flow [2023-08-03 16:53:42,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-08-03 16:53:42,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-03 16:53:42,133 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 93 flow [2023-08-03 16:53:42,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:42,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:42,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:53:42,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:53:42,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 16:53:42,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash 326461649, now seen corresponding path program 1 times [2023-08-03 16:53:42,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587344529] [2023-08-03 16:53:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:42,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:42,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:53:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:42,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:53:42,192 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:53:42,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 16:53:42,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 16:53:42,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 16:53:42,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 16:53:42,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 16:53:42,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 16:53:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:53:42,195 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 16:53:42,196 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:53:42,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:53:42,213 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:53:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,344 INFO L124 PetriNetUnfolderBase]: 93/1415 cut-off events. [2023-08-03 16:53:42,345 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 16:53:42,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 1415 events. 93/1415 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9841 event pairs, 0 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 1020. Up to 54 conditions per place. [2023-08-03 16:53:42,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:53:42,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 16:53:42,455 INFO L124 PetriNetUnfolderBase]: 93/1415 cut-off events. [2023-08-03 16:53:42,455 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 16:53:42,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 1415 events. 93/1415 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9841 event pairs, 0 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 1020. Up to 54 conditions per place. [2023-08-03 16:53:42,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 6736 [2023-08-03 16:53:45,350 INFO L134 LiptonReduction]: Checked pairs total: 21003 [2023-08-03 16:53:45,350 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-03 16:53:45,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:53:45,353 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;@15d18e68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:53:45,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 16:53:45,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:53:45,355 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 16:53:45,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:45,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:45,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 16:53:45,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:53:45,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 831402488, now seen corresponding path program 1 times [2023-08-03 16:53:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055331501] [2023-08-03 16:53:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:53:45,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055331501] [2023-08-03 16:53:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055331501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:45,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:53:45,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226917076] [2023-08-03 16:53:45,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 281 [2023-08-03 16:53:45,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 281 [2023-08-03 16:53:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:54:22,284 INFO L124 PetriNetUnfolderBase]: 378842/493693 cut-off events. [2023-08-03 16:54:22,284 INFO L125 PetriNetUnfolderBase]: For 5748/5748 co-relation queries the response was YES. [2023-08-03 16:54:23,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977934 conditions, 493693 events. 378842/493693 cut-off events. For 5748/5748 co-relation queries the response was YES. Maximal size of possible extension queue 16030. Compared 3589921 event pairs, 346158 based on Foata normal form. 10836/439000 useless extension candidates. Maximal degree in co-relation 282394. Up to 476892 conditions per place. [2023-08-03 16:54:24,933 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 43 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 16:54:24,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 244 flow [2023-08-03 16:54:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:54:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:54:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-03 16:54:24,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290628706998813 [2023-08-03 16:54:24,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-03 16:54:24,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-03 16:54:24,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:54:24,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-03 16:54:24,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:54:24,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:54:24,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:54:24,940 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 148 flow. Second operand 3 states and 446 transitions. [2023-08-03 16:54:24,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 244 flow [2023-08-03 16:54:24,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 59 transitions, 238 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 16:54:24,955 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 152 flow [2023-08-03 16:54:24,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-08-03 16:54:24,955 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-03 16:54:24,956 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 152 flow [2023-08-03 16:54:24,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:54:24,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:54:24,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:54:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 16:54:24,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:54:24,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:54:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 477054723, now seen corresponding path program 1 times [2023-08-03 16:54:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:54:24,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343463093] [2023-08-03 16:54:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:54:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:54:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:54:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:54:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:54:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343463093] [2023-08-03 16:54:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343463093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:54:25,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002599840] [2023-08-03 16:54:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:54:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:54:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:54:25,036 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) [2023-08-03 16:54:25,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 16:54:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:54:25,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 16:54:25,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:54:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:54:25,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:54:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002599840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:54:25,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:54:25,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 16:54:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986224903] [2023-08-03 16:54:25,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:54:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:54:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:54:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:54:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:54:25,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 281 [2023-08-03 16:54:25,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:54:25,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:54:25,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 281 [2023-08-03 16:54:25,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:54:59,444 INFO L124 PetriNetUnfolderBase]: 366838/478051 cut-off events. [2023-08-03 16:54:59,445 INFO L125 PetriNetUnfolderBase]: For 4155/4155 co-relation queries the response was YES. [2023-08-03 16:55:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944579 conditions, 478051 events. 366838/478051 cut-off events. For 4155/4155 co-relation queries the response was YES. Maximal size of possible extension queue 15895. Compared 3454386 event pairs, 296770 based on Foata normal form. 0/417819 useless extension candidates. Maximal degree in co-relation 944541. Up to 460105 conditions per place. [2023-08-03 16:55:02,293 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 49 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-03 16:55:02,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 272 flow [2023-08-03 16:55:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:55:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:55:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-03 16:55:02,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338078291814946 [2023-08-03 16:55:02,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-03 16:55:02,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-03 16:55:02,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:55:02,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-03 16:55:02,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:02,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:02,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:02,298 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 152 flow. Second operand 3 states and 450 transitions. [2023-08-03 16:55:02,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 272 flow [2023-08-03 16:55:02,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 65 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:55:02,300 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 162 flow [2023-08-03 16:55:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2023-08-03 16:55:02,301 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-03 16:55:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 162 flow [2023-08-03 16:55:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:02,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:55:02,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:55:02,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 16:55:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:55:02,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:55:02,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:55:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1720992206, now seen corresponding path program 1 times [2023-08-03 16:55:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:55:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077234454] [2023-08-03 16:55:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:55:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:55:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:55:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:55:02,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:55:02,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077234454] [2023-08-03 16:55:02,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077234454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:55:02,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826260165] [2023-08-03 16:55:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:55:02,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:55:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:55:02,566 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) [2023-08-03 16:55:02,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 16:55:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:55:02,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:55:02,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:55:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:55:02,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:55:02,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826260165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:55:02,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:55:02,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:55:02,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120578070] [2023-08-03 16:55:02,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:55:02,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:55:02,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:55:02,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:55:02,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:55:02,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 281 [2023-08-03 16:55:02,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:02,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:55:02,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 281 [2023-08-03 16:55:02,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:55:36,713 INFO L124 PetriNetUnfolderBase]: 366826/477987 cut-off events. [2023-08-03 16:55:36,714 INFO L125 PetriNetUnfolderBase]: For 4679/4679 co-relation queries the response was YES. [2023-08-03 16:55:38,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945017 conditions, 477987 events. 366826/477987 cut-off events. For 4679/4679 co-relation queries the response was YES. Maximal size of possible extension queue 16008. Compared 3471173 event pairs, 281206 based on Foata normal form. 9/418032 useless extension candidates. Maximal degree in co-relation 273483. Up to 460209 conditions per place. [2023-08-03 16:55:39,682 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 47 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 16:55:39,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 281 flow [2023-08-03 16:55:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:55:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:55:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 711 transitions. [2023-08-03 16:55:39,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060498220640569 [2023-08-03 16:55:39,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 711 transitions. [2023-08-03 16:55:39,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 711 transitions. [2023-08-03 16:55:39,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:55:39,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 711 transitions. [2023-08-03 16:55:39,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.2) internal successors, (711), 5 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:39,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:39,688 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:39,688 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 162 flow. Second operand 5 states and 711 transitions. [2023-08-03 16:55:39,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 281 flow [2023-08-03 16:55:39,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:55:39,690 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 178 flow [2023-08-03 16:55:39,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-08-03 16:55:39,690 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-08-03 16:55:39,691 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 178 flow [2023-08-03 16:55:39,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:39,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:55:39,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:55:39,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 16:55:39,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:55:39,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:55:39,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:55:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2010663422, now seen corresponding path program 1 times [2023-08-03 16:55:39,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:55:39,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68942684] [2023-08-03 16:55:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:55:39,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:55:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:55:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:55:39,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:55:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68942684] [2023-08-03 16:55:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68942684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:55:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685021582] [2023-08-03 16:55:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:55:39,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:55:39,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:55:39,943 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) [2023-08-03 16:55:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 16:55:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:55:40,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:55:40,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:55:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:55:40,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:55:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:55:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685021582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:55:40,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:55:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 16:55:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640020255] [2023-08-03 16:55:40,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:55:40,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:55:40,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:55:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:55:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:55:40,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 281 [2023-08-03 16:55:40,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:55:40,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:55:40,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 281 [2023-08-03 16:55:40,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand