/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_safe007_power.opt-thin001_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:15:27,590 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:15:27,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:15:27,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:15:27,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:15:27,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:15:27,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:15:27,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:15:27,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:15:27,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:15:27,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:15:27,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:15:27,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:15:27,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:15:27,665 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:15:27,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:15:27,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:15:27,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:15:27,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:15:27,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:15:27,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:15:27,668 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:15:27,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:15:27,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:15:27,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:15:27,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:15:27,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:15:27,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:15:27,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:15:27,671 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:15:27,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:15:27,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:15:27,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:15:27,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:15:27,867 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:15:27,867 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:15:27,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 00:15:28,785 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:15:28,964 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:15:28,965 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 00:15:28,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bba71360/e470ff8a129841a3b53ff63612d2e092/FLAGe433fd961 [2023-08-04 00:15:28,992 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bba71360/e470ff8a129841a3b53ff63612d2e092 [2023-08-04 00:15:28,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:15:28,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:15:28,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:15:28,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:15:29,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:15:29,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:15:28" (1/1) ... [2023-08-04 00:15:29,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581e0dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29, skipping insertion in model container [2023-08-04 00:15:29,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:15:28" (1/1) ... [2023-08-04 00:15:29,047 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:15:29,180 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_safe007_power.opt-thin001_power.opt_bound2.i[969,982] [2023-08-04 00:15:29,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:15:29,348 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:15:29,355 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_safe007_power.opt-thin001_power.opt_bound2.i[969,982] [2023-08-04 00:15:29,360 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:15:29,361 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:15:29,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:15:29,422 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:15:29,422 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:15:29,427 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:15:29,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29 WrapperNode [2023-08-04 00:15:29,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:15:29,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:15:29,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:15:29,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:15:29,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,480 INFO L138 Inliner]: procedures = 176, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 206 [2023-08-04 00:15:29,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:15:29,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:15:29,480 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:15:29,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:15:29,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:15:29,531 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:15:29,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:15:29,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:15:29,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (1/1) ... [2023-08-04 00:15:29,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:15:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:29,560 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 00:15:29,573 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 00:15:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:15:29,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:15:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:15:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:15:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:15:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:15:29,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:15:29,585 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 00:15:29,699 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:15:29,700 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:15:30,059 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:15:30,234 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:15:30,234 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:15:30,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:15:30 BoogieIcfgContainer [2023-08-04 00:15:30,236 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:15:30,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:15:30,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:15:30,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:15:30,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:15:28" (1/3) ... [2023-08-04 00:15:30,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a80975f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:15:30, skipping insertion in model container [2023-08-04 00:15:30,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:29" (2/3) ... [2023-08-04 00:15:30,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a80975f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:15:30, skipping insertion in model container [2023-08-04 00:15:30,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:15:30" (3/3) ... [2023-08-04 00:15:30,243 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 00:15:30,248 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:15:30,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:15:30,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 00:15:30,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:15:30,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:15:30,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 00:15:30,450 INFO L124 PetriNetUnfolderBase]: 30/468 cut-off events. [2023-08-04 00:15:30,451 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:30,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 468 events. 30/468 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1972 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 289. Up to 16 conditions per place. [2023-08-04 00:15:30,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 00:15:30,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 119 transitions, 253 flow [2023-08-04 00:15:30,463 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:15:30,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 00:15:30,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 00:15:30,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 119 transitions, 253 flow [2023-08-04 00:15:30,496 INFO L124 PetriNetUnfolderBase]: 6/236 cut-off events. [2023-08-04 00:15:30,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:30,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 236 events. 6/236 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-04 00:15:30,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 1312 [2023-08-04 00:15:35,895 INFO L134 LiptonReduction]: Checked pairs total: 3750 [2023-08-04 00:15:35,895 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 00:15:35,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:15:35,908 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;@7a9c9d33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:15:35,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:15:35,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:15:35,911 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:15:35,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:35,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:35,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:15:35,912 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 00:15:35,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash -710100561, now seen corresponding path program 1 times [2023-08-04 00:15:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:35,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894454763] [2023-08-04 00:15:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:15:36,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:15:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:15:36,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:15:36,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:15:36,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:15:36,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:15:36,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:15:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:15:36,088 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:15:36,089 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:15:36,090 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:15:36,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:15:36,127 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:15:36,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 00:15:36,269 INFO L124 PetriNetUnfolderBase]: 93/1399 cut-off events. [2023-08-04 00:15:36,270 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:15:36,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1399 events. 93/1399 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9478 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1022. Up to 54 conditions per place. [2023-08-04 00:15:36,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 00:15:36,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 143 transitions, 322 flow [2023-08-04 00:15:36,278 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:15:36,278 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 143 transitions, 322 flow [2023-08-04 00:15:36,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 143 transitions, 322 flow [2023-08-04 00:15:36,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 143 transitions, 322 flow [2023-08-04 00:15:36,362 INFO L124 PetriNetUnfolderBase]: 12/616 cut-off events. [2023-08-04 00:15:36,363 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:15:36,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 616 events. 12/616 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3035 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 500. Up to 27 conditions per place. [2023-08-04 00:15:36,372 INFO L119 LiptonReduction]: Number of co-enabled transitions 3628 [2023-08-04 00:15:43,073 INFO L134 LiptonReduction]: Checked pairs total: 14242 [2023-08-04 00:15:43,073 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 00:15:43,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:15:43,075 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;@7a9c9d33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:15:43,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:15:43,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:15:43,081 INFO L124 PetriNetUnfolderBase]: 0/67 cut-off events. [2023-08-04 00:15:43,081 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:15:43,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:43,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:15:43,082 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 00:15:43,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1206247960, now seen corresponding path program 1 times [2023-08-04 00:15:43,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:43,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654961380] [2023-08-04 00:15:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:43,177 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 00:15:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654961380] [2023-08-04 00:15:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654961380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:15:43,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:15:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:15:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999793094] [2023-08-04 00:15:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:15:43,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:15:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:15:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:15:43,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 276 [2023-08-04 00:15:43,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 276 [2023-08-04 00:15:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:15:56,251 INFO L124 PetriNetUnfolderBase]: 80532/105424 cut-off events. [2023-08-04 00:15:56,251 INFO L125 PetriNetUnfolderBase]: For 7122/7122 co-relation queries the response was YES. [2023-08-04 00:15:56,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217087 conditions, 105424 events. 80532/105424 cut-off events. For 7122/7122 co-relation queries the response was YES. Maximal size of possible extension queue 3247. Compared 650678 event pairs, 65382 based on Foata normal form. 0/97210 useless extension candidates. Maximal degree in co-relation 62256. Up to 103258 conditions per place. [2023-08-04 00:15:56,831 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 36 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 00:15:56,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 208 flow [2023-08-04 00:15:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:15:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:15:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:15:56,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688405797101449 [2023-08-04 00:15:56,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:15:56,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:15:56,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:15:56,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:15:56,849 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 00:15:56,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:56,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:56,854 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 124 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:15:56,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 208 flow [2023-08-04 00:15:56,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 202 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:15:56,864 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 130 flow [2023-08-04 00:15:56,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-04 00:15:56,867 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 00:15:56,868 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 130 flow [2023-08-04 00:15:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:56,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:56,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:15:56,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:15:56,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:56,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1897674894, now seen corresponding path program 1 times [2023-08-04 00:15:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672165137] [2023-08-04 00:15:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:56,961 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 00:15:56,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672165137] [2023-08-04 00:15:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672165137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:15:56,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137652996] [2023-08-04 00:15:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:56,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:15:56,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:56,965 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 00:15:56,968 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 00:15:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:57,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:15:57,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:15:57,111 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 00:15:57,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:15:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137652996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:15:57,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:15:57,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:15:57,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022378670] [2023-08-04 00:15:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:15:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:15:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:15:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:15:57,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 276 [2023-08-04 00:15:57,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:57,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:57,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 276 [2023-08-04 00:15:57,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:09,134 INFO L124 PetriNetUnfolderBase]: 80520/105385 cut-off events. [2023-08-04 00:16:09,134 INFO L125 PetriNetUnfolderBase]: For 6663/6663 co-relation queries the response was YES. [2023-08-04 00:16:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216595 conditions, 105385 events. 80520/105385 cut-off events. For 6663/6663 co-relation queries the response was YES. Maximal size of possible extension queue 3247. Compared 650199 event pairs, 54024 based on Foata normal form. 9/97198 useless extension candidates. Maximal degree in co-relation 77235. Up to 103211 conditions per place. [2023-08-04 00:16:09,699 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-04 00:16:09,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 230 flow [2023-08-04 00:16:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:16:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:16:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-08-04 00:16:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-04 00:16:09,702 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-08-04 00:16:09,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-08-04 00:16:09,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:09,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-08-04 00:16:09,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:09,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:09,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:09,707 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 130 flow. Second operand 5 states and 759 transitions. [2023-08-04 00:16:09,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 230 flow [2023-08-04 00:16:09,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:16:09,711 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 144 flow [2023-08-04 00:16:09,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-04 00:16:09,712 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-04 00:16:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 144 flow [2023-08-04 00:16:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:09,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:09,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:09,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:16:09,917 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 00:16:09,918 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 00:16:09,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1121644807, now seen corresponding path program 1 times [2023-08-04 00:16:09,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:09,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777553890] [2023-08-04 00:16:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:09,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:09,987 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 00:16:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777553890] [2023-08-04 00:16:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777553890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717381629] [2023-08-04 00:16:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:09,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:09,989 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 00:16:09,990 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 00:16:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:10,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:16:10,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:10,100 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 00:16:10,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717381629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:10,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:10,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:16:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548764889] [2023-08-04 00:16:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:10,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:10,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 276 [2023-08-04 00:16:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:10,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 276 [2023-08-04 00:16:10,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:22,073 INFO L124 PetriNetUnfolderBase]: 79478/108068 cut-off events. [2023-08-04 00:16:22,073 INFO L125 PetriNetUnfolderBase]: For 6298/6298 co-relation queries the response was YES. [2023-08-04 00:16:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218527 conditions, 108068 events. 79478/108068 cut-off events. For 6298/6298 co-relation queries the response was YES. Maximal size of possible extension queue 3624. Compared 731460 event pairs, 60946 based on Foata normal form. 0/99320 useless extension candidates. Maximal degree in co-relation 62956. Up to 101500 conditions per place. [2023-08-04 00:16:22,683 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 44 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 00:16:22,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 260 flow [2023-08-04 00:16:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:16:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:16:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 00:16:22,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772946859903382 [2023-08-04 00:16:22,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 00:16:22,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 00:16:22,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:22,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 00:16:22,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:22,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:22,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:22,688 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 144 flow. Second operand 3 states and 478 transitions. [2023-08-04 00:16:22,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 260 flow [2023-08-04 00:16:22,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:16:22,690 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 152 flow [2023-08-04 00:16:22,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-04 00:16:22,693 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-08-04 00:16:22,693 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 152 flow [2023-08-04 00:16:22,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:22,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:22,696 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:22,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:22,900 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 00:16:22,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:22,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash 746583593, now seen corresponding path program 1 times [2023-08-04 00:16:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:22,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562718821] [2023-08-04 00:16:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:22,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:22,942 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 00:16:22,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:22,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562718821] [2023-08-04 00:16:22,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562718821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:22,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938316066] [2023-08-04 00:16:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:22,944 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 00:16:22,946 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 00:16:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:23,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:16:23,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:23,059 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 00:16:23,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:16:23,071 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 00:16:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938316066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:16:23,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:16:23,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:16:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642580022] [2023-08-04 00:16:23,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:16:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:23,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 276 [2023-08-04 00:16:23,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:23,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:23,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 276 [2023-08-04 00:16:23,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:32,342 INFO L124 PetriNetUnfolderBase]: 62389/83819 cut-off events. [2023-08-04 00:16:32,343 INFO L125 PetriNetUnfolderBase]: For 5526/5526 co-relation queries the response was YES. [2023-08-04 00:16:32,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170265 conditions, 83819 events. 62389/83819 cut-off events. For 5526/5526 co-relation queries the response was YES. Maximal size of possible extension queue 3025. Compared 539846 event pairs, 40167 based on Foata normal form. 3/77639 useless extension candidates. Maximal degree in co-relation 60436. Up to 79039 conditions per place. [2023-08-04 00:16:32,828 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 00:16:32,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 52 transitions, 245 flow [2023-08-04 00:16:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2023-08-04 00:16:32,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2023-08-04 00:16:32,830 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2023-08-04 00:16:32,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2023-08-04 00:16:32,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:32,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2023-08-04 00:16:32,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:32,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:32,834 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:32,834 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 152 flow. Second operand 4 states and 615 transitions. [2023-08-04 00:16:32,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 52 transitions, 245 flow [2023-08-04 00:16:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 52 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:16:32,835 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 147 flow [2023-08-04 00:16:32,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 00:16:32,836 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-04 00:16:32,836 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 147 flow [2023-08-04 00:16:32,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:32,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:32,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:32,845 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 00:16:33,041 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 00:16:33,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:33,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -453386215, now seen corresponding path program 1 times [2023-08-04 00:16:33,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:33,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110829975] [2023-08-04 00:16:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:33,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:33,114 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 00:16:33,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:33,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110829975] [2023-08-04 00:16:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110829975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167014659] [2023-08-04 00:16:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:33,120 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 00:16:33,122 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 00:16:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:33,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:16:33,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:33,249 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 00:16:33,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:33,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167014659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:33,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:33,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:16:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905454056] [2023-08-04 00:16:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:33,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:16:33,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 276 [2023-08-04 00:16:33,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:33,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:33,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 276 [2023-08-04 00:16:33,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:42,528 INFO L124 PetriNetUnfolderBase]: 61417/83518 cut-off events. [2023-08-04 00:16:42,529 INFO L125 PetriNetUnfolderBase]: For 4327/4327 co-relation queries the response was YES. [2023-08-04 00:16:42,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168744 conditions, 83518 events. 61417/83518 cut-off events. For 4327/4327 co-relation queries the response was YES. Maximal size of possible extension queue 3099. Compared 553268 event pairs, 14764 based on Foata normal form. 324/78037 useless extension candidates. Maximal degree in co-relation 59855. Up to 76185 conditions per place. [2023-08-04 00:16:42,968 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 61 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-04 00:16:42,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 333 flow [2023-08-04 00:16:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:16:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:16:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 780 transitions. [2023-08-04 00:16:42,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2023-08-04 00:16:42,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 780 transitions. [2023-08-04 00:16:42,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 780 transitions. [2023-08-04 00:16:42,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:42,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 780 transitions. [2023-08-04 00:16:42,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:42,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:42,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:42,974 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 147 flow. Second operand 5 states and 780 transitions. [2023-08-04 00:16:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 333 flow [2023-08-04 00:16:42,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:16:42,977 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 157 flow [2023-08-04 00:16:42,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-08-04 00:16:42,978 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-04 00:16:42,978 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 157 flow [2023-08-04 00:16:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:42,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:42,978 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 00:16:42,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 00:16:43,183 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 00:16:43,183 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 00:16:43,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2081011174, now seen corresponding path program 1 times [2023-08-04 00:16:43,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:43,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823795391] [2023-08-04 00:16:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:43,234 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 00:16:43,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823795391] [2023-08-04 00:16:43,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823795391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954378456] [2023-08-04 00:16:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:43,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:43,236 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 00:16:43,238 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 00:16:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:43,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:16:43,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:43,369 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 00:16:43,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:16:43,380 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 00:16:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954378456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:16:43,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:16:43,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:16:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988545458] [2023-08-04 00:16:43,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:16:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 276 [2023-08-04 00:16:43,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:43,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:43,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 276 [2023-08-04 00:16:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:51,589 INFO L124 PetriNetUnfolderBase]: 54514/73591 cut-off events. [2023-08-04 00:16:51,590 INFO L125 PetriNetUnfolderBase]: For 5617/5617 co-relation queries the response was YES. [2023-08-04 00:16:51,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149814 conditions, 73591 events. 54514/73591 cut-off events. For 5617/5617 co-relation queries the response was YES. Maximal size of possible extension queue 2985. Compared 473002 event pairs, 30802 based on Foata normal form. 54/68317 useless extension candidates. Maximal degree in co-relation 53054. Up to 67120 conditions per place. [2023-08-04 00:16:52,041 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 57 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-04 00:16:52,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 319 flow [2023-08-04 00:16:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 00:16:52,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2023-08-04 00:16:52,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 00:16:52,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 00:16:52,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:52,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 00:16:52,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:52,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:52,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:52,046 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 157 flow. Second operand 4 states and 632 transitions. [2023-08-04 00:16:52,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 319 flow [2023-08-04 00:16:52,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 314 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:16:52,048 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 150 flow [2023-08-04 00:16:52,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-04 00:16:52,049 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-04 00:16:52,049 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 150 flow [2023-08-04 00:16:52,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:52,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:52,049 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 00:16:52,067 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 00:16:52,267 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 00:16:52,267 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 00:16:52,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -826240628, now seen corresponding path program 1 times [2023-08-04 00:16:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:52,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609131359] [2023-08-04 00:16:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:16:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609131359] [2023-08-04 00:16:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609131359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577401896] [2023-08-04 00:16:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:52,317 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 00:16:52,344 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 00:16:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:52,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:16:52,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:52,453 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 00:16:52,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577401896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:52,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:16:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603681841] [2023-08-04 00:16:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:16:52,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:16:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:52,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 276 [2023-08-04 00:16:52,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:52,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:52,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 276 [2023-08-04 00:16:52,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:57,208 INFO L124 PetriNetUnfolderBase]: 31186/43450 cut-off events. [2023-08-04 00:16:57,208 INFO L125 PetriNetUnfolderBase]: For 4600/4600 co-relation queries the response was YES. [2023-08-04 00:16:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90243 conditions, 43450 events. 31186/43450 cut-off events. For 4600/4600 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 277519 event pairs, 2026 based on Foata normal form. 5184/45682 useless extension candidates. Maximal degree in co-relation 34502. Up to 30780 conditions per place. [2023-08-04 00:16:57,372 INFO L140 encePairwiseOnDemand]: 274/276 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2023-08-04 00:16:57,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 342 flow [2023-08-04 00:16:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 642 transitions. [2023-08-04 00:16:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2023-08-04 00:16:57,373 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 642 transitions. [2023-08-04 00:16:57,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 642 transitions. [2023-08-04 00:16:57,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:57,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 642 transitions. [2023-08-04 00:16:57,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:57,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:57,376 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:57,377 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 150 flow. Second operand 4 states and 642 transitions. [2023-08-04 00:16:57,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 342 flow [2023-08-04 00:16:57,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 335 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:16:57,727 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-04 00:16:57,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-04 00:16:57,728 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-04 00:16:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-04 00:16:57,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:57,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:16:57,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:16:57,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:16:57,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:57,929 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:57,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:16:57,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 00:16:58,033 INFO L124 PetriNetUnfolderBase]: 93/1399 cut-off events. [2023-08-04 00:16:58,033 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:16:58,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1399 events. 93/1399 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9478 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1022. Up to 54 conditions per place. [2023-08-04 00:16:58,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 00:16:58,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 171 transitions, 374 flow [2023-08-04 00:16:58,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:16:58,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 171 transitions, 374 flow [2023-08-04 00:16:58,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 171 transitions, 374 flow [2023-08-04 00:16:58,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 171 transitions, 374 flow [2023-08-04 00:16:58,138 INFO L124 PetriNetUnfolderBase]: 93/1398 cut-off events. [2023-08-04 00:16:58,139 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 00:16:58,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1398 events. 93/1398 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9478 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 00:16:58,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 6040 [2023-08-04 00:17:04,616 INFO L134 LiptonReduction]: Checked pairs total: 19605 [2023-08-04 00:17:04,616 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-04 00:17:04,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:17:04,617 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;@7a9c9d33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:17:04,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:17:04,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:17:04,620 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 00:17:04,621 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:17:04,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:04,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:17:04,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:17:04,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash -787372142, now seen corresponding path program 1 times [2023-08-04 00:17:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:04,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48139009] [2023-08-04 00:17:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:04,646 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 00:17:04,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:04,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48139009] [2023-08-04 00:17:04,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48139009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:04,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:17:04,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:17:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081054076] [2023-08-04 00:17:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:04,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:17:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:17:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:17:04,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 305 [2023-08-04 00:17:04,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:04,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:04,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 305 [2023-08-04 00:17:04,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand