/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/weaver_parallel-lamport.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:00:58,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:00:58,681 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:00:58,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:00:58,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:00:58,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:00:58,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:00:58,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:00:58,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:00:58,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:00:58,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:00:58,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:00:58,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:00:58,720 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:00:58,721 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:00:58,721 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:00:58,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:00:58,721 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:00:58,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:00:58,722 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:00:58,722 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:00:58,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:00:58,723 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:00:58,723 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:00:58,724 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:00:58,724 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:00:58,724 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:00:58,725 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:00:58,725 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:00:58,725 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:00:58,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:00:58,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:00:58,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:00:58,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:00:58,728 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:00:58,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:00:58,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:00:59,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:00:59,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:00:59,003 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:00:59,004 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:00:59,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-03 20:01:00,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:01:00,284 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:01:00,284 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-03 20:01:00,291 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e308b3138/fc194e6bf8564135aba0689cdee8bd14/FLAGa9e0a3e08 [2023-08-03 20:01:00,305 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e308b3138/fc194e6bf8564135aba0689cdee8bd14 [2023-08-03 20:01:00,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:01:00,308 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:01:00,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:01:00,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:01:00,312 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:01:00,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50222a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00, skipping insertion in model container [2023-08-03 20:01:00,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,335 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:01:00,474 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-03 20:01:00,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:01:00,486 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:01:00,510 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-03 20:01:00,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:01:00,528 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:01:00,528 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:01:00,535 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:01:00,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00 WrapperNode [2023-08-03 20:01:00,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:01:00,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:01:00,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:01:00,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:01:00,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,577 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 291 [2023-08-03 20:01:00,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:01:00,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:01:00,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:01:00,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:01:00,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,597 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,603 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:01:00,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:01:00,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:01:00,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:01:00,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (1/1) ... [2023-08-03 20:01:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:01:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:01:00,642 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 20:01:00,647 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 20:01:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:01:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:01:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:01:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:01:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:01:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:01:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:01:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:01:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:01:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:01:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:01:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:01:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:01:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:01:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:01:00,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:01:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:01:00,674 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 20:01:00,767 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:01:00,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:01:01,054 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:01:01,159 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:01:01,160 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 20:01:01,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:01:01 BoogieIcfgContainer [2023-08-03 20:01:01,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:01:01,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:01:01,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:01:01,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:01:01,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:01:00" (1/3) ... [2023-08-03 20:01:01,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9228e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:01:01, skipping insertion in model container [2023-08-03 20:01:01,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:00" (2/3) ... [2023-08-03 20:01:01,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9228e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:01:01, skipping insertion in model container [2023-08-03 20:01:01,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:01:01" (3/3) ... [2023-08-03 20:01:01,169 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-lamport.wvr_bound2.c [2023-08-03 20:01:01,176 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:01:01,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:01:01,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:01:01,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:01:01,246 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:01:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 498 flow [2023-08-03 20:01:01,444 INFO L124 PetriNetUnfolderBase]: 88/683 cut-off events. [2023-08-03 20:01:01,444 INFO L125 PetriNetUnfolderBase]: For 36/38 co-relation queries the response was YES. [2023-08-03 20:01:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 683 events. 88/683 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 393. Up to 16 conditions per place. [2023-08-03 20:01:01,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 228 transitions, 498 flow [2023-08-03 20:01:01,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 218 transitions, 478 flow [2023-08-03 20:01:01,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:01:01,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 218 transitions, 478 flow [2023-08-03 20:01:01,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 218 transitions, 478 flow [2023-08-03 20:01:01,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 218 transitions, 478 flow [2023-08-03 20:01:01,566 INFO L124 PetriNetUnfolderBase]: 88/603 cut-off events. [2023-08-03 20:01:01,566 INFO L125 PetriNetUnfolderBase]: For 36/38 co-relation queries the response was YES. [2023-08-03 20:01:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 603 events. 88/603 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2591 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-03 20:01:01,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 4610 [2023-08-03 20:01:07,429 INFO L134 LiptonReduction]: Checked pairs total: 24982 [2023-08-03 20:01:07,429 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-03 20:01:07,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:01:07,447 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;@3c3e417a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:01:07,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:01:07,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:01:07,453 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-08-03 20:01:07,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:01:07,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:07,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:01:07,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:07,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1030700369, now seen corresponding path program 1 times [2023-08-03 20:01:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:07,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699825656] [2023-08-03 20:01:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:01:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:01:07,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:01:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699825656] [2023-08-03 20:01:07,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699825656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:01:07,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:01:07,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:01:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887301944] [2023-08-03 20:01:07,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:01:07,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:01:07,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:01:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:01:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:01:07,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 413 [2023-08-03 20:01:07,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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 20:01:07,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:01:07,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 413 [2023-08-03 20:01:07,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:01:08,690 INFO L124 PetriNetUnfolderBase]: 4486/7406 cut-off events. [2023-08-03 20:01:08,690 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2023-08-03 20:01:08,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14689 conditions, 7406 events. 4486/7406 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 48885 event pairs, 4170 based on Foata normal form. 0/6461 useless extension candidates. Maximal degree in co-relation 12538. Up to 6823 conditions per place. [2023-08-03 20:01:08,743 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 44 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-03 20:01:08,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 258 flow [2023-08-03 20:01:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:01:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:01:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-03 20:01:08,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907183212267958 [2023-08-03 20:01:08,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-03 20:01:08,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-03 20:01:08,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:01:08,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-03 20:01:08,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:08,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 20:01:08,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 20:01:08,787 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 164 flow. Second operand 3 states and 608 transitions. [2023-08-03 20:01:08,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 258 flow [2023-08-03 20:01:08,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:01:08,802 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 176 flow [2023-08-03 20:01:08,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-08-03 20:01:08,807 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-03 20:01:08,807 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 176 flow [2023-08-03 20:01:08,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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 20:01:08,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:08,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:01:08,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:01:08,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:08,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1892267804, now seen corresponding path program 1 times [2023-08-03 20:01:08,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:08,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521629931] [2023-08-03 20:01:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:01:08,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:01:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:01:08,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:01:08,936 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:01:08,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:01:08,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:01:08,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:01:08,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:01:08,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:01:08,944 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:01:08,946 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:01:08,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:01:08,987 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:01:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 269 transitions, 628 flow [2023-08-03 20:01:09,548 INFO L124 PetriNetUnfolderBase]: 840/4112 cut-off events. [2023-08-03 20:01:09,549 INFO L125 PetriNetUnfolderBase]: For 602/608 co-relation queries the response was YES. [2023-08-03 20:01:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 4112 events. 840/4112 cut-off events. For 602/608 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 33391 event pairs, 11 based on Foata normal form. 0/3516 useless extension candidates. Maximal degree in co-relation 2441. Up to 192 conditions per place. [2023-08-03 20:01:09,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 269 transitions, 628 flow [2023-08-03 20:01:09,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 259 transitions, 608 flow [2023-08-03 20:01:09,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:01:09,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 259 transitions, 608 flow [2023-08-03 20:01:09,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 259 transitions, 608 flow [2023-08-03 20:01:09,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 259 transitions, 608 flow [2023-08-03 20:01:09,985 INFO L124 PetriNetUnfolderBase]: 840/3472 cut-off events. [2023-08-03 20:01:09,986 INFO L125 PetriNetUnfolderBase]: For 602/608 co-relation queries the response was YES. [2023-08-03 20:01:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 3472 events. 840/3472 cut-off events. For 602/608 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 26102 event pairs, 11 based on Foata normal form. 0/2940 useless extension candidates. Maximal degree in co-relation 2121. Up to 192 conditions per place. [2023-08-03 20:01:10,078 INFO L119 LiptonReduction]: Number of co-enabled transitions 12148 [2023-08-03 20:01:15,695 INFO L134 LiptonReduction]: Checked pairs total: 102752 [2023-08-03 20:01:15,695 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-03 20:01:15,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:01:15,698 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;@3c3e417a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:01:15,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:01:15,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:01:15,701 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-03 20:01:15,702 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:01:15,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:15,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:01:15,702 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 1 more)] === [2023-08-03 20:01:15,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash 649057687, now seen corresponding path program 1 times [2023-08-03 20:01:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:15,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231342602] [2023-08-03 20:01:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:01:15,776 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 20:01:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:01:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231342602] [2023-08-03 20:01:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231342602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:01:15,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:01:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:01:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742133526] [2023-08-03 20:01:15,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:01:15,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:01:15,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:01:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:01:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:01:15,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 457 [2023-08-03 20:01:15,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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 20:01:15,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:01:15,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 457 [2023-08-03 20:01:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand