/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:33:26,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:33:26,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:33:26,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:33:26,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:33:26,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:33:26,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:33:26,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:33:26,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:33:26,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:33:26,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:33:26,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:33:26,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:33:26,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:33:26,479 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:33:26,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:33:26,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:33:26,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:33:26,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:33:26,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:33:26,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:33:26,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:33:26,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:33:26,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:33:26,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:33:26,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:33:26,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:33:26,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:33:26,483 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:33:26,484 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:33:26,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:33:26,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:33:26,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:33:26,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:33:26,677 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:33:26,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i [2023-08-04 00:33:27,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:33:27,894 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:33:27,895 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i [2023-08-04 00:33:27,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3dc2d67/6c11030ec0ec4cdaab7bbe32e92e84cf/FLAG60ac1491a [2023-08-04 00:33:27,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3dc2d67/6c11030ec0ec4cdaab7bbe32e92e84cf [2023-08-04 00:33:27,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:33:27,931 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:33:27,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:33:27,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:33:27,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:33:27,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:33:27" (1/1) ... [2023-08-04 00:33:27,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6362745a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:27, skipping insertion in model container [2023-08-04 00:33:27,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:33:27" (1/1) ... [2023-08-04 00:33:27,986 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:33:28,107 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_safe015_power.opt_bound2.i[994,1007] [2023-08-04 00:33:28,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:33:28,285 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:33:28,292 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_safe015_power.opt_bound2.i[994,1007] [2023-08-04 00:33:28,297 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:33:28,298 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:33:28,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:33:28,344 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:33:28,344 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:33:28,349 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:33:28,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28 WrapperNode [2023-08-04 00:33:28,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:33:28,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:33:28,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:33:28,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:33:28,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,393 INFO L138 Inliner]: procedures = 176, calls = 86, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 193 [2023-08-04 00:33:28,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:33:28,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:33:28,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:33:28,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:33:28,399 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:33:28,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:33:28,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:33:28,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:33:28,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (1/1) ... [2023-08-04 00:33:28,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:33:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:33:28,466 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 00:33:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:33:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:33:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:33:28,488 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:33:28,488 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:33:28,488 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:33:28,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:33:28,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:33:28,490 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 00:33:28,480 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 00:33:28,623 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:33:28,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:33:28,974 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:33:29,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:33:29,196 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:33:29,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:33:29 BoogieIcfgContainer [2023-08-04 00:33:29,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:33:29,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:33:29,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:33:29,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:33:29,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:33:27" (1/3) ... [2023-08-04 00:33:29,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2380b352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:33:29, skipping insertion in model container [2023-08-04 00:33:29,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:33:28" (2/3) ... [2023-08-04 00:33:29,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2380b352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:33:29, skipping insertion in model container [2023-08-04 00:33:29,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:33:29" (3/3) ... [2023-08-04 00:33:29,205 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe015_power.opt_bound2.i [2023-08-04 00:33:29,210 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:33:29,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:33:29,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:33:29,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:33:29,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:33:29,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:33:29,415 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 00:33:29,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:33:29,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1951 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 00:33:29,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:33:29,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 00:33:29,425 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:33:29,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:33:29,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:33:29,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 00:33:29,459 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 00:33:29,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:33:29,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 614 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 00:33:29,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 00:33:34,119 INFO L134 LiptonReduction]: Checked pairs total: 3288 [2023-08-04 00:33:34,119 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 00:33:34,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:33:34,135 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;@157ba37c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:33:34,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:33:34,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:33:34,139 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:33:34,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:33:34,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:33:34,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:33:34,140 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 00:33:34,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:33:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1815473870, now seen corresponding path program 1 times [2023-08-04 00:33:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:33:34,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813289944] [2023-08-04 00:33:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:33:34,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:33:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:33:34,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:33:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:33:34,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:33:34,294 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:33:34,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:33:34,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:33:34,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:33:34,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:33:34,297 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:33:34,298 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:33:34,299 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:33:34,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:33:34,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:33:34,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:33:34,446 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:33:34,446 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:33:34,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9385 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:33:34,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:33:34,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-04 00:33:34,453 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:33:34,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:33:34,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:33:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-04 00:33:34,504 INFO L124 PetriNetUnfolderBase]: 12/608 cut-off events. [2023-08-04 00:33:34,504 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:33:34,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 608 events. 12/608 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2973 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 492. Up to 27 conditions per place. [2023-08-04 00:33:34,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 3388 [2023-08-04 00:33:40,409 INFO L134 LiptonReduction]: Checked pairs total: 11547 [2023-08-04 00:33:40,409 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 00:33:40,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:33:40,411 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;@157ba37c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:33:40,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:33:40,420 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:33:40,420 INFO L124 PetriNetUnfolderBase]: 0/57 cut-off events. [2023-08-04 00:33:40,420 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:33:40,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:33:40,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:33:40,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:33:40,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:33:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1872697244, now seen corresponding path program 1 times [2023-08-04 00:33:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:33:40,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189568523] [2023-08-04 00:33:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:33:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:33:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:33:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:33:40,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:33:40,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189568523] [2023-08-04 00:33:40,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189568523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:33:40,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:33:40,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:33:40,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860551494] [2023-08-04 00:33:40,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:33:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:33:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:33:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:33:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:33:40,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:33:40,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:40,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:33:40,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:33:40,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:33:51,557 INFO L124 PetriNetUnfolderBase]: 64827/88718 cut-off events. [2023-08-04 00:33:51,557 INFO L125 PetriNetUnfolderBase]: For 5928/5928 co-relation queries the response was YES. [2023-08-04 00:33:51,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179217 conditions, 88718 events. 64827/88718 cut-off events. For 5928/5928 co-relation queries the response was YES. Maximal size of possible extension queue 2639. Compared 587774 event pairs, 50940 based on Foata normal form. 0/87326 useless extension candidates. Maximal degree in co-relation 41521. Up to 83344 conditions per place. [2023-08-04 00:33:52,094 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:33:52,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 204 flow [2023-08-04 00:33:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:33:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:33:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-04 00:33:52,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728395061728395 [2023-08-04 00:33:52,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-04 00:33:52,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-04 00:33:52,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:33:52,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-04 00:33:52,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:52,115 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 120 flow. Second operand 3 states and 464 transitions. [2023-08-04 00:33:52,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 204 flow [2023-08-04 00:33:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 198 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:33:52,124 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 126 flow [2023-08-04 00:33:52,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-04 00:33:52,127 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-04 00:33:52,127 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 126 flow [2023-08-04 00:33:52,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:52,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:33:52,128 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:33:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:33:52,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:33:52,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:33:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 489440852, now seen corresponding path program 1 times [2023-08-04 00:33:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:33:52,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476259292] [2023-08-04 00:33:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:33:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:33:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:33:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:33:52,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:33:52,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476259292] [2023-08-04 00:33:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476259292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:33:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287760862] [2023-08-04 00:33:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:33:52,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:33:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:33:52,196 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 00:33:52,203 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 00:33:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:33:52,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:33:52,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:33:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:33:52,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:33:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287760862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:33:52,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:33:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:33:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427074570] [2023-08-04 00:33:52,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:33:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:33:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:33:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:33:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:33:52,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:33:52,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:33:52,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:33:52,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:33:52,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:03,360 INFO L124 PetriNetUnfolderBase]: 64803/88754 cut-off events. [2023-08-04 00:34:03,361 INFO L125 PetriNetUnfolderBase]: For 5384/5384 co-relation queries the response was YES. [2023-08-04 00:34:03,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178772 conditions, 88754 events. 64803/88754 cut-off events. For 5384/5384 co-relation queries the response was YES. Maximal size of possible extension queue 2638. Compared 589136 event pairs, 39840 based on Foata normal form. 16/87450 useless extension candidates. Maximal degree in co-relation 46995. Up to 83261 conditions per place. [2023-08-04 00:34:04,048 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 40 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-04 00:34:04,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 234 flow [2023-08-04 00:34:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:34:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:34:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-04 00:34:04,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 00:34:04,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-04 00:34:04,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-04 00:34:04,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:04,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-04 00:34:04,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:04,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:04,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:04,057 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 126 flow. Second operand 5 states and 750 transitions. [2023-08-04 00:34:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 234 flow [2023-08-04 00:34:04,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:34:04,058 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 140 flow [2023-08-04 00:34:04,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-04 00:34:04,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-04 00:34:04,059 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 140 flow [2023-08-04 00:34:04,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:04,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:04,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:04,067 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 00:34:04,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:04,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:04,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:04,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1202303307, now seen corresponding path program 1 times [2023-08-04 00:34:04,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:04,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807845026] [2023-08-04 00:34:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:04,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:34:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:04,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807845026] [2023-08-04 00:34:04,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807845026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:34:04,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890416913] [2023-08-04 00:34:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:04,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:04,320 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 00:34:04,322 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 00:34:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:04,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:34:04,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:34:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:34:04,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:34:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890416913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:04,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:34:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:34:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777659061] [2023-08-04 00:34:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:04,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:34:04,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:34:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:34:04,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:34:04,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:04,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:04,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:34:04,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:14,719 INFO L124 PetriNetUnfolderBase]: 62916/86407 cut-off events. [2023-08-04 00:34:14,719 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-04 00:34:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174061 conditions, 86407 events. 62916/86407 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 2697. Compared 577039 event pairs, 49614 based on Foata normal form. 0/84967 useless extension candidates. Maximal degree in co-relation 40450. Up to 80321 conditions per place. [2023-08-04 00:34:15,150 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 00:34:15,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 252 flow [2023-08-04 00:34:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:34:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:34:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-04 00:34:15,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2023-08-04 00:34:15,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-04 00:34:15,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-04 00:34:15,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:15,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-04 00:34:15,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:15,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:15,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:15,155 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 140 flow. Second operand 3 states and 470 transitions. [2023-08-04 00:34:15,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 252 flow [2023-08-04 00:34:15,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 245 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:34:15,158 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 148 flow [2023-08-04 00:34:15,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-04 00:34:15,159 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-04 00:34:15,159 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 148 flow [2023-08-04 00:34:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:15,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:15,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:15,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:34:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 00:34:15,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:15,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1153029463, now seen corresponding path program 1 times [2023-08-04 00:34:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:15,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728736675] [2023-08-04 00:34:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:34:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728736675] [2023-08-04 00:34:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728736675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:34:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34870024] [2023-08-04 00:34:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:15,405 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 00:34:15,407 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 00:34:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:15,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:34:15,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:34:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:34:15,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:34:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:34:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34870024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:34:15,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:34:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:34:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977142092] [2023-08-04 00:34:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:34:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:34:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:34:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:34:15,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:34:15,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:15,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:15,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:34:15,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:24,072 INFO L124 PetriNetUnfolderBase]: 52458/71229 cut-off events. [2023-08-04 00:34:24,073 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2023-08-04 00:34:24,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144189 conditions, 71229 events. 52458/71229 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 2333. Compared 453870 event pairs, 31248 based on Foata normal form. 4/70385 useless extension candidates. Maximal degree in co-relation 37793. Up to 66569 conditions per place. [2023-08-04 00:34:24,458 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:34:24,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 249 flow [2023-08-04 00:34:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:34:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:34:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 00:34:24,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2023-08-04 00:34:24,460 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 00:34:24,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 00:34:24,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:24,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 00:34:24,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:24,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:24,463 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:24,463 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 148 flow. Second operand 4 states and 608 transitions. [2023-08-04 00:34:24,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 249 flow [2023-08-04 00:34:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:34:24,466 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 143 flow [2023-08-04 00:34:24,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:34:24,467 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:34:24,468 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 143 flow [2023-08-04 00:34:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:24,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:24,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:24,472 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 00:34:24,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:24,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:24,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:24,672 INFO L85 PathProgramCache]: Analyzing trace with hash 994133127, now seen corresponding path program 1 times [2023-08-04 00:34:24,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:24,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638316318] [2023-08-04 00:34:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:24,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:34:24,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638316318] [2023-08-04 00:34:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638316318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:34:24,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078880192] [2023-08-04 00:34:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:24,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:24,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:24,750 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 00:34:24,751 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 00:34:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:24,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:34:24,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:34:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:34:24,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:34:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078880192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:24,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:34:24,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:34:24,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585768154] [2023-08-04 00:34:24,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:24,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:34:24,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:34:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:34:24,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:34:24,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:24,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:24,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:34:24,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:33,323 INFO L124 PetriNetUnfolderBase]: 51690/70557 cut-off events. [2023-08-04 00:34:33,324 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2023-08-04 00:34:33,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142594 conditions, 70557 events. 51690/70557 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 2376. Compared 458159 event pairs, 12522 based on Foata normal form. 256/70173 useless extension candidates. Maximal degree in co-relation 37361. Up to 64016 conditions per place. [2023-08-04 00:34:33,705 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 59 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-04 00:34:33,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 325 flow [2023-08-04 00:34:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:34:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:34:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 768 transitions. [2023-08-04 00:34:33,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688888888888889 [2023-08-04 00:34:33,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 768 transitions. [2023-08-04 00:34:33,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 768 transitions. [2023-08-04 00:34:33,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:33,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 768 transitions. [2023-08-04 00:34:33,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:33,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:33,711 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:33,711 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 143 flow. Second operand 5 states and 768 transitions. [2023-08-04 00:34:33,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 325 flow [2023-08-04 00:34:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:34:33,715 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 153 flow [2023-08-04 00:34:33,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-04 00:34:33,716 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-04 00:34:33,716 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 153 flow [2023-08-04 00:34:33,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:33,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:33,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:33,721 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 00:34:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:33,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:33,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash 302190016, now seen corresponding path program 1 times [2023-08-04 00:34:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:33,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918307344] [2023-08-04 00:34:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:34:34,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918307344] [2023-08-04 00:34:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918307344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:34:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762244294] [2023-08-04 00:34:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:34,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:34,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:34,176 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 00:34:34,205 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 00:34:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:34,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:34:34,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:34:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:34:34,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:34:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:34:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762244294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:34:34,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:34:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:34:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751878576] [2023-08-04 00:34:34,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:34:34,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:34:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:34:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:34:34,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:34:34,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:34,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:34,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:34:34,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:41,473 INFO L124 PetriNetUnfolderBase]: 43290/58573 cut-off events. [2023-08-04 00:34:41,473 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-04 00:34:41,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119342 conditions, 58573 events. 43290/58573 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 2192. Compared 363370 event pairs, 26154 based on Foata normal form. 64/58125 useless extension candidates. Maximal degree in co-relation 31221. Up to 53081 conditions per place. [2023-08-04 00:34:41,739 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 53 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-04 00:34:41,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 303 flow [2023-08-04 00:34:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:34:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:34:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:34:41,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2023-08-04 00:34:41,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:34:41,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:34:41,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:41,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:34:41,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:41,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:41,743 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:41,744 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 153 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:34:41,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 303 flow [2023-08-04 00:34:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:34:41,746 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 146 flow [2023-08-04 00:34:41,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-04 00:34:41,746 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-04 00:34:41,746 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 146 flow [2023-08-04 00:34:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:41,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:41,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:41,752 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 00:34:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:41,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:41,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1548721884, now seen corresponding path program 1 times [2023-08-04 00:34:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:41,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803783699] [2023-08-04 00:34:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:34:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803783699] [2023-08-04 00:34:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803783699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:42,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:34:42,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:34:42,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444336790] [2023-08-04 00:34:42,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:34:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:42,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:34:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:34:42,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:34:42,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:42,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:42,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:34:42,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:46,089 INFO L124 PetriNetUnfolderBase]: 24858/34845 cut-off events. [2023-08-04 00:34:46,090 INFO L125 PetriNetUnfolderBase]: For 3866/3866 co-relation queries the response was YES. [2023-08-04 00:34:46,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72382 conditions, 34845 events. 24858/34845 cut-off events. For 3866/3866 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 214613 event pairs, 1818 based on Foata normal form. 4096/38941 useless extension candidates. Maximal degree in co-relation 28337. Up to 24320 conditions per place. [2023-08-04 00:34:46,189 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-04 00:34:46,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 318 flow [2023-08-04 00:34:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:34:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:34:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-04 00:34:46,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5814814814814815 [2023-08-04 00:34:46,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-04 00:34:46,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-04 00:34:46,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:46,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-04 00:34:46,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:46,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:46,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:46,195 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 146 flow. Second operand 4 states and 628 transitions. [2023-08-04 00:34:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 318 flow [2023-08-04 00:34:46,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:34:46,397 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 00:34:46,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 00:34:46,398 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:34:46,398 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 00:34:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:46,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:34:46,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:34:46,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:34:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 00:34:46,399 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:46,399 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:34:46,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:34:46,492 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:34:46,492 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:34:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9385 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:34:46,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:34:46,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 00:34:46,496 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:34:46,496 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:34:46,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:34:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 00:34:46,582 INFO L124 PetriNetUnfolderBase]: 66/1054 cut-off events. [2023-08-04 00:34:46,582 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:34:46,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1054 events. 66/1054 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6496 event pairs, 0 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 786. Up to 54 conditions per place. [2023-08-04 00:34:46,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 00:34:54,066 INFO L134 LiptonReduction]: Checked pairs total: 16373 [2023-08-04 00:34:54,066 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 00:34:54,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:34:54,067 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;@157ba37c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:34:54,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:34:54,070 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:34:54,070 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 00:34:54,070 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:34:54,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:54,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:54,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:34:54,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 449315437, now seen corresponding path program 1 times [2023-08-04 00:34:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912167334] [2023-08-04 00:34:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:54,103 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 00:34:54,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912167334] [2023-08-04 00:34:54,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912167334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:54,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:34:54,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:34:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178141698] [2023-08-04 00:34:54,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:54,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:34:54,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:34:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:34:54,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:34:54,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:54,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:54,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:34:54,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:38,761 INFO L124 PetriNetUnfolderBase]: 272349/359420 cut-off events. [2023-08-04 00:35:38,761 INFO L125 PetriNetUnfolderBase]: For 5408/5408 co-relation queries the response was YES. [2023-08-04 00:35:39,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709393 conditions, 359420 events. 272349/359420 cut-off events. For 5408/5408 co-relation queries the response was YES. Maximal size of possible extension queue 8789. Compared 2446900 event pairs, 218772 based on Foata normal form. 8820/348988 useless extension candidates. Maximal degree in co-relation 153292. Up to 343786 conditions per place. [2023-08-04 00:35:40,352 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 00:35:40,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 210 flow [2023-08-04 00:35:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:35:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:35:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:35:40,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-04 00:35:40,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:35:40,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:35:40,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:40,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:35:40,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:40,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:40,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:40,356 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 116 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:35:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 210 flow [2023-08-04 00:35:40,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:35:40,358 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 124 flow [2023-08-04 00:35:40,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 00:35:40,359 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-04 00:35:40,359 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 124 flow [2023-08-04 00:35:40,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:40,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:35:40,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:35:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 421716534, now seen corresponding path program 1 times [2023-08-04 00:35:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687000201] [2023-08-04 00:35:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:40,400 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 00:35:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687000201] [2023-08-04 00:35:40,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687000201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:35:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464970787] [2023-08-04 00:35:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:40,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:35:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:35:40,402 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 00:35:40,404 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 00:35:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:40,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:35:40,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:35:40,532 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 00:35:40,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:35:40,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464970787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:35:40,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:35:40,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:35:40,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797818202] [2023-08-04 00:35:40,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:35:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:35:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:35:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:35:40,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:35:40,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:40,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:40,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:35:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand