/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_longest_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:10:00,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:10:00,404 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:10:00,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:10:00,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:10:00,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:10:00,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:10:00,434 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:10:00,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:10:00,437 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:10:00,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:10:00,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:10:00,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:10:00,439 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:10:00,440 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:10:00,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:10:00,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:10:00,440 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:10:00,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:10:00,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:10:00,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:10:00,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:10:00,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:10:00,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:10:00,442 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:10:00,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:10:00,442 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:10:00,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:10:00,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:10:00,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:10:00,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:10:00,444 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:10:00,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:10:00,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:10:00,445 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:10:00,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:10:00,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:10:00,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:10:00,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:10:00,640 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:10:00,640 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:10:00,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longest_bound2.i [2023-08-03 19:10:01,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:10:01,768 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:10:01,768 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longest_bound2.i [2023-08-03 19:10:01,783 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae59e3e9f/6718a97d6d8f460f931587e468206bc7/FLAG178e6dd5c [2023-08-03 19:10:01,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae59e3e9f/6718a97d6d8f460f931587e468206bc7 [2023-08-03 19:10:01,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:10:01,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:10:01,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:10:01,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:10:01,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:10:01,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:10:01" (1/1) ... [2023-08-03 19:10:01,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269745e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:01, skipping insertion in model container [2023-08-03 19:10:01,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:10:01" (1/1) ... [2023-08-03 19:10:01,838 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:10:02,122 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_longest_bound2.i[43296,43309] [2023-08-03 19:10:02,124 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_longest_bound2.i[43503,43516] [2023-08-03 19:10:02,129 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_longest_bound2.i[43789,43802] [2023-08-03 19:10:02,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:10:02,144 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:10:02,154 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-03 19:10:02,155 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-03 19:10:02,160 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-03 19:10:02,168 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_longest_bound2.i[43296,43309] [2023-08-03 19:10:02,169 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_longest_bound2.i[43503,43516] [2023-08-03 19:10:02,171 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_longest_bound2.i[43789,43802] [2023-08-03 19:10:02,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:10:02,208 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:10:02,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02 WrapperNode [2023-08-03 19:10:02,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:10:02,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:10:02,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:10:02,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:10:02,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,240 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 275 [2023-08-03 19:10:02,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:10:02,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:10:02,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:10:02,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:10:02,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,257 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:10:02,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:10:02,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:10:02,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:10:02,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (1/1) ... [2023-08-03 19:10:02,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:10:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:10:02,293 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 19:10:02,298 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 19:10:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:10:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:10:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:10:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:10:02,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:10:02,318 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 19:10:02,416 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:10:02,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:10:02,665 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:10:02,671 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:10:02,671 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:10:02,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:10:02 BoogieIcfgContainer [2023-08-03 19:10:02,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:10:02,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:10:02,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:10:02,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:10:02,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:10:01" (1/3) ... [2023-08-03 19:10:02,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636d69ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:10:02, skipping insertion in model container [2023-08-03 19:10:02,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:10:02" (2/3) ... [2023-08-03 19:10:02,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636d69ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:10:02, skipping insertion in model container [2023-08-03 19:10:02,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:10:02" (3/3) ... [2023-08-03 19:10:02,678 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_queue_longest_bound2.i [2023-08-03 19:10:02,682 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:10:02,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:10:02,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-03 19:10:02,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:10:02,755 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:10:02,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,855 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-03 19:10:02,856 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-03 19:10:02,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-03 19:10:02,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:10:02,884 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-03 19:10:02,964 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-03 19:10:02,965 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-03 19:10:02,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-03 19:10:02,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 29746 [2023-08-03 19:10:09,215 INFO L134 LiptonReduction]: Checked pairs total: 58073 [2023-08-03 19:10:09,215 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-03 19:10:09,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:10:09,228 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;@4c7e650b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:10:09,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 19:10:09,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:10:09,230 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 19:10:09,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:10:09,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:10:09,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 19:10:09,231 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 4 more)] === [2023-08-03 19:10:09,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:10:09,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1124, now seen corresponding path program 1 times [2023-08-03 19:10:09,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:10:09,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743466071] [2023-08-03 19:10:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:10:09,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:10:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:10:09,305 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 19:10:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:10:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743466071] [2023-08-03 19:10:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743466071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:10:09,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:10:09,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 19:10:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176524539] [2023-08-03 19:10:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:10:09,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 19:10:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:10:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 19:10:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 19:10:09,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 530 [2023-08-03 19:10:09,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 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 19:10:09,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:10:09,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 530 [2023-08-03 19:10:09,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:10:09,984 INFO L124 PetriNetUnfolderBase]: 7512/12008 cut-off events. [2023-08-03 19:10:09,984 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-03 19:10:09,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23160 conditions, 12008 events. 7512/12008 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 68819 event pairs, 6096 based on Foata normal form. 140/9282 useless extension candidates. Maximal degree in co-relation 22322. Up to 11004 conditions per place. [2023-08-03 19:10:10,039 INFO L140 encePairwiseOnDemand]: 527/530 looper letters, 64 selfloop transitions, 0 changer transitions 0/77 dead transitions. [2023-08-03 19:10:10,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 304 flow [2023-08-03 19:10:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 19:10:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 19:10:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 605 transitions. [2023-08-03 19:10:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2023-08-03 19:10:10,110 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 605 transitions. [2023-08-03 19:10:10,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 605 transitions. [2023-08-03 19:10:10,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:10:10,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 605 transitions. [2023-08-03 19:10:10,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 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 19:10:10,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 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 19:10:10,135 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 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 19:10:10,136 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 182 flow. Second operand 2 states and 605 transitions. [2023-08-03 19:10:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 304 flow [2023-08-03 19:10:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:10:10,142 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 176 flow [2023-08-03 19:10:10,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=176, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-08-03 19:10:10,146 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-03 19:10:10,146 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 176 flow [2023-08-03 19:10:10,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 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 19:10:10,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:10:10,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:10:10,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:10:10,147 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 4 more)] === [2023-08-03 19:10:10,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:10:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1221578771, now seen corresponding path program 1 times [2023-08-03 19:10:10,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:10:10,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143925207] [2023-08-03 19:10:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:10:10,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:10:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:10:10,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:10:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:10:10,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:10:10,318 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:10:10,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-03 19:10:10,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-03 19:10:10,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-03 19:10:10,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-03 19:10:10,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-03 19:10:10,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-03 19:10:10,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-03 19:10:10,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:10:10,323 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:10:10,325 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:10:10,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:10:10,388 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:10:10,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,559 INFO L124 PetriNetUnfolderBase]: 149/1208 cut-off events. [2023-08-03 19:10:10,559 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-03 19:10:10,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 149/1208 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7295 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 784. Up to 32 conditions per place. [2023-08-03 19:10:10,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:10:10,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,594 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 466 transitions, 980 flow [2023-08-03 19:10:10,772 INFO L124 PetriNetUnfolderBase]: 149/1208 cut-off events. [2023-08-03 19:10:10,773 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-03 19:10:10,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 149/1208 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7295 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 784. Up to 32 conditions per place. [2023-08-03 19:10:10,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 122216 [2023-08-03 19:10:17,874 INFO L134 LiptonReduction]: Checked pairs total: 292210 [2023-08-03 19:10:17,875 INFO L136 LiptonReduction]: Total number of compositions: 382 [2023-08-03 19:10:17,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:10:17,877 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;@4c7e650b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:10:17,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-03 19:10:17,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:10:17,877 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 19:10:17,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:10:17,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:10:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 19:10:17,877 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 6 more)] === [2023-08-03 19:10:17,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:10:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2147, now seen corresponding path program 1 times [2023-08-03 19:10:17,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:10:17,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559328026] [2023-08-03 19:10:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:10:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:10:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:10:17,885 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 19:10:17,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:10:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559328026] [2023-08-03 19:10:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559328026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:10:17,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:10:17,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 19:10:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075486440] [2023-08-03 19:10:17,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:10:17,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 19:10:17,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:10:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 19:10:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 19:10:17,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 848 [2023-08-03 19:10:17,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 340 flow. Second operand has 2 states, 2 states have (on average 435.5) internal successors, (871), 2 states have internal predecessors, (871), 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 19:10:17,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:10:17,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 848 [2023-08-03 19:10:17,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand