/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_ok_longer_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:11:40,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:11:40,962 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:11:40,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:11:40,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:11:40,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:11:40,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:11:41,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:11:41,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:11:41,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:11:41,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:11:41,008 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:11:41,009 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:11:41,010 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:11:41,010 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:11:41,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:11:41,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:11:41,011 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:11:41,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:11:41,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:11:41,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:11:41,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:11:41,012 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:11:41,012 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:11:41,012 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:11:41,013 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:11:41,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:11:41,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:11:41,014 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:11:41,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:11:41,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:11:41,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:11:41,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:11:41,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:11:41,016 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:11:41,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:11:41,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:11:41,017 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:11:41,017 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:11:41,017 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:11:41,017 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:11:41,017 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:11:41,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:11:41,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:11:41,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:11:41,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:11:41,265 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:11:41,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_ok_longer_bound2.i [2023-08-03 19:11:42,431 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:11:42,727 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:11:42,727 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_ok_longer_bound2.i [2023-08-03 19:11:42,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f0cd313/6ec0ba478ed440ff97715d94712030ab/FLAGca03db4f3 [2023-08-03 19:11:42,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f0cd313/6ec0ba478ed440ff97715d94712030ab [2023-08-03 19:11:42,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:11:42,761 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:11:42,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:11:42,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:11:42,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:11:42,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:11:42" (1/1) ... [2023-08-03 19:11:42,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7163542d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:42, skipping insertion in model container [2023-08-03 19:11:42,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:11:42" (1/1) ... [2023-08-03 19:11:42,810 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:11:43,216 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_queue_ok_longer_bound2.i[43272,43285] [2023-08-03 19:11:43,223 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_queue_ok_longer_bound2.i[43551,43564] [2023-08-03 19:11:43,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:11:43,241 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:11:43,260 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-03 19:11:43,261 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-03 19:11:43,269 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-03 19:11:43,281 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_queue_ok_longer_bound2.i[43272,43285] [2023-08-03 19:11:43,284 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_queue_ok_longer_bound2.i[43551,43564] [2023-08-03 19:11:43,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:11:43,338 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:11:43,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43 WrapperNode [2023-08-03 19:11:43,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:11:43,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:11:43,339 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:11:43,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:11:43,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,391 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 235 [2023-08-03 19:11:43,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:11:43,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:11:43,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:11:43,393 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:11:43,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:11:43,429 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:11:43,429 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:11:43,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:11:43,430 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (1/1) ... [2023-08-03 19:11:43,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:11:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:11:43,459 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 19:11:43,463 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 19:11:43,499 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:11:43,499 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:11:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:11:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:11:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:11:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:11:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:11:43,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:11:43,504 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 19:11:43,721 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:11:43,724 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:11:44,081 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:11:44,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:11:44,088 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:11:44,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:11:44 BoogieIcfgContainer [2023-08-03 19:11:44,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:11:44,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:11:44,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:11:44,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:11:44,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:11:42" (1/3) ... [2023-08-03 19:11:44,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512822dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:11:44, skipping insertion in model container [2023-08-03 19:11:44,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:11:43" (2/3) ... [2023-08-03 19:11:44,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512822dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:11:44, skipping insertion in model container [2023-08-03 19:11:44,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:11:44" (3/3) ... [2023-08-03 19:11:44,101 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_queue_ok_longer_bound2.i [2023-08-03 19:11:44,108 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:11:44,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:11:44,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 19:11:44,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:11:44,222 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:11:44,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,369 INFO L124 PetriNetUnfolderBase]: 42/427 cut-off events. [2023-08-03 19:11:44,369 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:11:44,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 42/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1542 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-03 19:11:44,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,396 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:11:44,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 246 transitions, 514 flow [2023-08-03 19:11:44,472 INFO L124 PetriNetUnfolderBase]: 42/427 cut-off events. [2023-08-03 19:11:44,472 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:11:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 42/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1542 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-03 19:11:44,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 19708 [2023-08-03 19:11:50,447 INFO L134 LiptonReduction]: Checked pairs total: 40136 [2023-08-03 19:11:50,447 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-03 19:11:50,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:11:50,465 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;@195961b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:11:50,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 19:11:50,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:11:50,466 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 19:11:50,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:11:50,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:11:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 19:11:50,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 19:11:50,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:11:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-08-03 19:11:50,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:11:50,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847590715] [2023-08-03 19:11:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:11:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:11:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:11:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:11:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:11:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847590715] [2023-08-03 19:11:50,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847590715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:11:50,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:11:50,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 19:11:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278161855] [2023-08-03 19:11:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:11:50,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 19:11:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:11:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 19:11:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 19:11:50,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 462 [2023-08-03 19:11:50,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:50,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:11:50,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 462 [2023-08-03 19:11:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:11:51,159 INFO L124 PetriNetUnfolderBase]: 4106/6392 cut-off events. [2023-08-03 19:11:51,160 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-08-03 19:11:51,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12590 conditions, 6392 events. 4106/6392 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 35146 event pairs, 3168 based on Foata normal form. 0/4871 useless extension candidates. Maximal degree in co-relation 11734. Up to 6087 conditions per place. [2023-08-03 19:11:51,201 INFO L140 encePairwiseOnDemand]: 461/462 looper letters, 49 selfloop transitions, 0 changer transitions 2/62 dead transitions. [2023-08-03 19:11:51,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 248 flow [2023-08-03 19:11:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 19:11:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 19:11:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 510 transitions. [2023-08-03 19:11:51,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2023-08-03 19:11:51,224 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 510 transitions. [2023-08-03 19:11:51,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 510 transitions. [2023-08-03 19:11:51,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:11:51,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 510 transitions. [2023-08-03 19:11:51,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 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 19:11:51,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 19:11:51,241 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 19:11:51,243 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 148 flow. Second operand 2 states and 510 transitions. [2023-08-03 19:11:51,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 248 flow [2023-08-03 19:11:51,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:11:51,251 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 136 flow [2023-08-03 19:11:51,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-03 19:11:51,256 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-03 19:11:51,256 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 136 flow [2023-08-03 19:11:51,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:51,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:11:51,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:11:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:11:51,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 19:11:51,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:11:51,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1634266432, now seen corresponding path program 1 times [2023-08-03 19:11:51,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:11:51,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695349413] [2023-08-03 19:11:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:11:51,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:11:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:11:51,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:11:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:11:51,370 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:11:51,370 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:11:51,371 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-03 19:11:51,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-03 19:11:51,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-03 19:11:51,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-03 19:11:51,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-03 19:11:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:11:51,374 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:11:51,376 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:11:51,376 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:11:51,449 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:11:51,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,713 INFO L124 PetriNetUnfolderBase]: 153/1208 cut-off events. [2023-08-03 19:11:51,713 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:11:51,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 153/1208 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7447 event pairs, 2 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 760. Up to 32 conditions per place. [2023-08-03 19:11:51,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,752 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:11:51,752 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 382 transitions, 812 flow [2023-08-03 19:11:51,930 INFO L124 PetriNetUnfolderBase]: 153/1208 cut-off events. [2023-08-03 19:11:51,930 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:11:51,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 153/1208 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7447 event pairs, 2 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 760. Up to 32 conditions per place. [2023-08-03 19:11:52,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 75764 [2023-08-03 19:11:59,091 INFO L134 LiptonReduction]: Checked pairs total: 167341 [2023-08-03 19:11:59,091 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-03 19:11:59,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:11:59,094 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;@195961b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:11:59,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 19:11:59,095 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:11:59,095 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 19:11:59,095 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:11:59,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:11:59,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 19:11:59,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 19:11:59,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:11:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1809, now seen corresponding path program 1 times [2023-08-03 19:11:59,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:11:59,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523532458] [2023-08-03 19:11:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:11:59,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:11:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:11:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:11:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:11:59,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523532458] [2023-08-03 19:11:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523532458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:11:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:11:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 19:11:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574630873] [2023-08-03 19:11:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:11:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 19:11:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:11:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 19:11:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 19:11:59,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 712 [2023-08-03 19:11:59,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 355.5) internal successors, (711), 2 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:11:59,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:11:59,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 712 [2023-08-03 19:11:59,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand