/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_mix001.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:59:46,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:59:46,699 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:59:46,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:59:46,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:59:46,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:59:46,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:59:46,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:59:46,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:59:46,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:59:46,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:59:46,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:59:46,729 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:59:46,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:59:46,730 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:59:46,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:59:46,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:59:46,730 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:59:46,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:59:46,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:59:46,732 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:59:46,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:59:46,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:59:46,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:59:46,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:59:46,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:59:46,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:59:46,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:59:46,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:59:46,735 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:59:46,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:59:46,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:59:46,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:59:46,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:59:46,924 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:59:46,924 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:59:46,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.oepc_bound2.i [2023-08-03 22:59:47,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:59:48,000 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:59:48,000 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.oepc_bound2.i [2023-08-03 22:59:48,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de8a9f140/fa08fa8882f049c4a5f37f10e42ab5df/FLAGd2bde7f4e [2023-08-03 22:59:48,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de8a9f140/fa08fa8882f049c4a5f37f10e42ab5df [2023-08-03 22:59:48,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:59:48,022 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:59:48,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:59:48,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:59:48,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:59:48,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a6b502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48, skipping insertion in model container [2023-08-03 22:59:48,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,056 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:59:48,152 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.oepc_bound2.i[988,1001] [2023-08-03 22:59:48,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:59:48,264 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:59:48,278 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix001.oepc_bound2.i[988,1001] [2023-08-03 22:59:48,292 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 22:59:48,294 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 22:59:48,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:59:48,361 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:59:48,361 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:59:48,365 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:59:48,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48 WrapperNode [2023-08-03 22:59:48,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:59:48,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:59:48,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:59:48,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:59:48,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,429 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 176 [2023-08-03 22:59:48,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:59:48,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:59:48,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:59:48,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:59:48,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:59:48,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:59:48,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:59:48,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:59:48,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (1/1) ... [2023-08-03 22:59:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:59:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:59:48,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:59:48,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:59:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:59:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 22:59:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:59:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:59:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:59:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 22:59:48,510 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 22:59:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 22:59:48,510 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 22:59:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 22:59:48,510 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 22:59:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:59:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 22:59:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:59:48,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:59:48,511 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:59:48,607 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:59:48,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:59:48,812 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:59:48,910 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:59:48,911 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 22:59:48,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:59:48 BoogieIcfgContainer [2023-08-03 22:59:48,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:59:48,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:59:48,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:59:48,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:59:48,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:59:48" (1/3) ... [2023-08-03 22:59:48,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbff30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:59:48, skipping insertion in model container [2023-08-03 22:59:48,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:59:48" (2/3) ... [2023-08-03 22:59:48,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbff30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:59:48, skipping insertion in model container [2023-08-03 22:59:48,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:59:48" (3/3) ... [2023-08-03 22:59:48,919 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix001.oepc_bound2.i [2023-08-03 22:59:48,923 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:59:48,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:59:48,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:59:48,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:59:48,969 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:59:48,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 22:59:49,104 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 22:59:49,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:59:49,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2030 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 276. Up to 16 conditions per place. [2023-08-03 22:59:49,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 22:59:49,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 107 transitions, 229 flow [2023-08-03 22:59:49,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:59:49,126 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 107 transitions, 229 flow [2023-08-03 22:59:49,128 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 107 transitions, 229 flow [2023-08-03 22:59:49,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 107 transitions, 229 flow [2023-08-03 22:59:49,171 INFO L124 PetriNetUnfolderBase]: 6/227 cut-off events. [2023-08-03 22:59:49,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:59:49,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 227 events. 6/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 669 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-03 22:59:49,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 1696 [2023-08-03 22:59:51,889 INFO L134 LiptonReduction]: Checked pairs total: 4473 [2023-08-03 22:59:51,889 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 22:59:51,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:59:51,901 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;@30edaa08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:59:51,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:59:51,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:59:51,905 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 22:59:51,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:59:51,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:59:51,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 22:59:51,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 22:59:51,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:59:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 196382511, now seen corresponding path program 1 times [2023-08-03 22:59:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:59:51,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000887882] [2023-08-03 22:59:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:59:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:59:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:59:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:59:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:59:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000887882] [2023-08-03 22:59:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000887882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:59:52,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:59:52,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:59:52,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388888984] [2023-08-03 22:59:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:59:52,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:59:52,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:59:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:59:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:59:52,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 221 [2023-08-03 22:59:52,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:52,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:59:52,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 221 [2023-08-03 22:59:52,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:59:52,269 INFO L124 PetriNetUnfolderBase]: 881/1430 cut-off events. [2023-08-03 22:59:52,269 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-03 22:59:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 1430 events. 881/1430 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6400 event pairs, 456 based on Foata normal form. 0/1302 useless extension candidates. Maximal degree in co-relation 2925. Up to 1392 conditions per place. [2023-08-03 22:59:52,278 INFO L140 encePairwiseOnDemand]: 218/221 looper letters, 28 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-03 22:59:52,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 143 flow [2023-08-03 22:59:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:59:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:59:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-03 22:59:52,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671191553544495 [2023-08-03 22:59:52,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-03 22:59:52,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-03 22:59:52,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:59:52,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-03 22:59:52,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:52,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:52,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:52,305 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 71 flow. Second operand 3 states and 376 transitions. [2023-08-03 22:59:52,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 143 flow [2023-08-03 22:59:52,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 143 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:59:52,309 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 79 flow [2023-08-03 22:59:52,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-03 22:59:52,312 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-03 22:59:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 79 flow [2023-08-03 22:59:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:52,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:59:52,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:59:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:59:52,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 22:59:52,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:59:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash 186678546, now seen corresponding path program 1 times [2023-08-03 22:59:52,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:59:52,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146089587] [2023-08-03 22:59:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:59:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:59:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:59:52,333 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:59:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:59:52,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:59:52,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:59:52,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 22:59:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 22:59:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 22:59:52,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:59:52,356 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 22:59:52,358 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 22:59:52,358 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:59:52,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:59:52,376 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:59:52,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 164 transitions, 364 flow [2023-08-03 22:59:52,480 INFO L124 PetriNetUnfolderBase]: 93/1407 cut-off events. [2023-08-03 22:59:52,481 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 22:59:52,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 1407 events. 93/1407 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9758 event pairs, 0 based on Foata normal form. 0/1246 useless extension candidates. Maximal degree in co-relation 1021. Up to 54 conditions per place. [2023-08-03 22:59:52,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 164 transitions, 364 flow [2023-08-03 22:59:52,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 135 transitions, 306 flow [2023-08-03 22:59:52,488 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:59:52,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 135 transitions, 306 flow [2023-08-03 22:59:52,488 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 135 transitions, 306 flow [2023-08-03 22:59:52,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 135 transitions, 306 flow [2023-08-03 22:59:52,531 INFO L124 PetriNetUnfolderBase]: 12/624 cut-off events. [2023-08-03 22:59:52,532 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 22:59:52,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 624 events. 12/624 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3230 event pairs, 0 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 499. Up to 27 conditions per place. [2023-08-03 22:59:52,541 INFO L119 LiptonReduction]: Number of co-enabled transitions 4796 [2023-08-03 22:59:55,075 INFO L134 LiptonReduction]: Checked pairs total: 20079 [2023-08-03 22:59:55,075 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-03 22:59:55,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:59:55,077 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;@30edaa08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:59:55,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:59:55,082 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:59:55,082 INFO L124 PetriNetUnfolderBase]: 0/70 cut-off events. [2023-08-03 22:59:55,082 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 22:59:55,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:59:55,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:59:55,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 22:59:55,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:59:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash 216316281, now seen corresponding path program 1 times [2023-08-03 22:59:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:59:55,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503353596] [2023-08-03 22:59:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:59:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:59:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:59:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 22:59:55,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:59:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503353596] [2023-08-03 22:59:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503353596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:59:55,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:59:55,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:59:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491183131] [2023-08-03 22:59:55,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:59:55,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:59:55,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:59:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:59:55,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:59:55,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 254 [2023-08-03 22:59:55,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:59:55,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:59:55,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 254 [2023-08-03 22:59:55,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:00:18,562 INFO L124 PetriNetUnfolderBase]: 215849/288519 cut-off events. [2023-08-03 23:00:18,562 INFO L125 PetriNetUnfolderBase]: For 15036/15036 co-relation queries the response was YES. [2023-08-03 23:00:19,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578396 conditions, 288519 events. 215849/288519 cut-off events. For 15036/15036 co-relation queries the response was YES. Maximal size of possible extension queue 8314. Compared 2078942 event pairs, 168744 based on Foata normal form. 0/265531 useless extension candidates. Maximal degree in co-relation 119054. Up to 272376 conditions per place. [2023-08-03 23:00:19,922 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 43 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 23:00:19,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 244 flow [2023-08-03 23:00:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:00:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:00:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-03 23:00:19,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583989501312336 [2023-08-03 23:00:19,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-03 23:00:19,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-03 23:00:19,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:00:19,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-03 23:00:19,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:19,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:19,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:19,926 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 140 flow. Second operand 3 states and 445 transitions. [2023-08-03 23:00:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 244 flow [2023-08-03 23:00:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 238 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:00:19,938 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 146 flow [2023-08-03 23:00:19,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-03 23:00:19,938 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-03 23:00:19,938 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 146 flow [2023-08-03 23:00:19,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:19,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:00:19,939 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:00:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:00:19,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:00:19,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:00:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 674955711, now seen corresponding path program 1 times [2023-08-03 23:00:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:00:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791877468] [2023-08-03 23:00:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:00:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:00:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:00:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:00:20,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:00:20,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791877468] [2023-08-03 23:00:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791877468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:00:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172167832] [2023-08-03 23:00:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:00:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:00:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:00:20,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:00:20,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:00:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:00:20,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:00:20,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:00:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:00:20,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:00:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172167832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:00:20,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:00:20,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:00:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506928356] [2023-08-03 23:00:20,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:00:20,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:00:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:00:20,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:00:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:00:20,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 254 [2023-08-03 23:00:20,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:20,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:00:20,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 254 [2023-08-03 23:00:20,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:00:42,613 INFO L124 PetriNetUnfolderBase]: 215789/288681 cut-off events. [2023-08-03 23:00:42,613 INFO L125 PetriNetUnfolderBase]: For 13950/13950 co-relation queries the response was YES. [2023-08-03 23:00:43,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577679 conditions, 288681 events. 215789/288681 cut-off events. For 13950/13950 co-relation queries the response was YES. Maximal size of possible extension queue 8319. Compared 2085783 event pairs, 128394 based on Foata normal form. 36/265855 useless extension candidates. Maximal degree in co-relation 118839. Up to 272191 conditions per place. [2023-08-03 23:00:44,006 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 52 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-03 23:00:44,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 290 flow [2023-08-03 23:00:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:00:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:00:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-03 23:00:44,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645669291338583 [2023-08-03 23:00:44,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-03 23:00:44,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-03 23:00:44,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:00:44,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-03 23:00:44,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:44,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:44,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:44,014 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 146 flow. Second operand 5 states and 717 transitions. [2023-08-03 23:00:44,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 290 flow [2023-08-03 23:00:44,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:00:44,019 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 160 flow [2023-08-03 23:00:44,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-03 23:00:44,020 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-03 23:00:44,021 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 160 flow [2023-08-03 23:00:44,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:44,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:00:44,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:00:44,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:00:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:00:44,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:00:44,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:00:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash -900691463, now seen corresponding path program 1 times [2023-08-03 23:00:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:00:44,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423108544] [2023-08-03 23:00:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:00:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:00:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:00:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:00:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:00:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423108544] [2023-08-03 23:00:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423108544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:00:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087428608] [2023-08-03 23:00:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:00:44,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:00:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:00:44,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:00:44,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:00:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:00:44,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:00:44,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:00:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:00:44,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:00:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087428608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:00:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:00:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:00:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409865025] [2023-08-03 23:00:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:00:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:00:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:00:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:00:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:00:44,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 254 [2023-08-03 23:00:44,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:00:44,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:00:44,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 254 [2023-08-03 23:00:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:01:05,934 INFO L124 PetriNetUnfolderBase]: 209136/275987 cut-off events. [2023-08-03 23:01:05,935 INFO L125 PetriNetUnfolderBase]: For 13057/13057 co-relation queries the response was YES. [2023-08-03 23:01:06,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556361 conditions, 275987 events. 209136/275987 cut-off events. For 13057/13057 co-relation queries the response was YES. Maximal size of possible extension queue 8429. Compared 1943788 event pairs, 168552 based on Foata normal form. 0/255892 useless extension candidates. Maximal degree in co-relation 152333. Up to 262431 conditions per place. [2023-08-03 23:01:07,489 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 52 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-03 23:01:07,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 300 flow [2023-08-03 23:01:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:01:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:01:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-03 23:01:07,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594488188976378 [2023-08-03 23:01:07,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-03 23:01:07,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-03 23:01:07,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:01:07,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-03 23:01:07,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:07,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:07,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:07,494 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 160 flow. Second operand 3 states and 453 transitions. [2023-08-03 23:01:07,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 300 flow [2023-08-03 23:01:07,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 293 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:01:07,495 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 168 flow [2023-08-03 23:01:07,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-03 23:01:07,496 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-03 23:01:07,496 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 168 flow [2023-08-03 23:01:07,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:07,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:01:07,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:01:07,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 23:01:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:01:07,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:01:07,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:01:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash 756418477, now seen corresponding path program 1 times [2023-08-03 23:01:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:01:07,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025375077] [2023-08-03 23:01:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:01:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:01:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:01:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025375077] [2023-08-03 23:01:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025375077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:01:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617966029] [2023-08-03 23:01:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:07,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:01:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:01:07,729 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:01:07,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:01:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:07,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:01:07,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:01:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:01:07,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:01:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:01:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617966029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:01:07,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:01:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:01:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789169291] [2023-08-03 23:01:07,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:01:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:01:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:01:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:01:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:01:07,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 254 [2023-08-03 23:01:07,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:07,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:01:07,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 254 [2023-08-03 23:01:07,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:01:27,597 INFO L124 PetriNetUnfolderBase]: 184768/241070 cut-off events. [2023-08-03 23:01:27,598 INFO L125 PetriNetUnfolderBase]: For 12780/12780 co-relation queries the response was YES. [2023-08-03 23:01:28,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488478 conditions, 241070 events. 184768/241070 cut-off events. For 12780/12780 co-relation queries the response was YES. Maximal size of possible extension queue 7646. Compared 1632434 event pairs, 107748 based on Foata normal form. 6/222605 useless extension candidates. Maximal degree in co-relation 99368. Up to 230917 conditions per place. [2023-08-03 23:01:28,815 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 53 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-03 23:01:28,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 305 flow [2023-08-03 23:01:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:01:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:01:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-03 23:01:28,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748031496062992 [2023-08-03 23:01:28,817 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-03 23:01:28,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-03 23:01:28,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:01:28,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-03 23:01:28,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:28,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:28,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:28,821 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 168 flow. Second operand 4 states and 584 transitions. [2023-08-03 23:01:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 305 flow [2023-08-03 23:01:28,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:01:28,823 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 163 flow [2023-08-03 23:01:28,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-03 23:01:28,823 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:01:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 163 flow [2023-08-03 23:01:28,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:28,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:01:28,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:01:28,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:01:29,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:01:29,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:01:29,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:01:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1398882764, now seen corresponding path program 1 times [2023-08-03 23:01:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:01:29,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514768074] [2023-08-03 23:01:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:01:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:01:29,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:01:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514768074] [2023-08-03 23:01:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514768074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:01:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930424062] [2023-08-03 23:01:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:01:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:01:29,081 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) [2023-08-03 23:01:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:01:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:29,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:01:29,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:01:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:01:29,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:01:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930424062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:01:29,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:01:29,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:01:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432981673] [2023-08-03 23:01:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:01:29,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:01:29,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:01:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:01:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:01:29,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 254 [2023-08-03 23:01:29,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:29,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:01:29,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 254 [2023-08-03 23:01:29,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand