/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:38:27,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:38:27,975 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:38:27,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:38:27,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:38:27,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:38:27,982 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:38:28,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:38:28,006 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:38:28,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:38:28,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:38:28,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:38:28,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:38:28,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:38:28,011 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:38:28,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:38:28,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:38:28,012 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:38:28,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:38:28,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:38:28,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:38:28,013 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:38:28,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:38:28,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:38:28,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:38:28,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:38:28,015 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:38:28,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:38:28,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:38:28,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:38:28,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:38:28,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:38:28,017 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:38:28,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:38:28,018 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:38:28,018 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:38:28,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:38:28,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:38:28,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:38:28,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:38:28,252 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:38:28,253 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 02:38:29,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:38:29,422 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:38:29,422 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 02:38:29,427 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d59c8cc3/a6df181ad76647d883ec6fb2b336e49e/FLAG85e17a94a [2023-08-04 02:38:29,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d59c8cc3/a6df181ad76647d883ec6fb2b336e49e [2023-08-04 02:38:29,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:38:29,438 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:38:29,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:38:29,438 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:38:29,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:38:29,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16145e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29, skipping insertion in model container [2023-08-04 02:38:29,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,456 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:38:29,555 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-ticket-3.wvr_bound2.c[3332,3345] [2023-08-04 02:38:29,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:38:29,562 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:38:29,578 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-ticket-3.wvr_bound2.c[3332,3345] [2023-08-04 02:38:29,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:38:29,584 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:38:29,584 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:38:29,590 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:38:29,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29 WrapperNode [2023-08-04 02:38:29,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:38:29,595 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:38:29,595 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:38:29,595 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:38:29,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,623 INFO L138 Inliner]: procedures = 22, calls = 55, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 213 [2023-08-04 02:38:29,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:38:29,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:38:29,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:38:29,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:38:29,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,638 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:38:29,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:38:29,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:38:29,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:38:29,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (1/1) ... [2023-08-04 02:38:29,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:38:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:38:29,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:38:29,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:38:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:38:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:38:29,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:38:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:38:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:38:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:38:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:38:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:38:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:38:29,699 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:38:29,768 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:38:29,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:38:30,004 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:38:30,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:38:30,068 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:38:30,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:38:30 BoogieIcfgContainer [2023-08-04 02:38:30,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:38:30,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:38:30,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:38:30,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:38:30,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:38:29" (1/3) ... [2023-08-04 02:38:30,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:38:30, skipping insertion in model container [2023-08-04 02:38:30,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:38:29" (2/3) ... [2023-08-04 02:38:30,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:38:30, skipping insertion in model container [2023-08-04 02:38:30,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:38:30" (3/3) ... [2023-08-04 02:38:30,077 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 02:38:30,083 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:38:30,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:38:30,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:38:30,091 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:38:30,163 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:38:30,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 02:38:30,341 INFO L124 PetriNetUnfolderBase]: 83/619 cut-off events. [2023-08-04 02:38:30,342 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:38:30,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 619 events. 83/619 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3137 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-04 02:38:30,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 02:38:30,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 111 transitions, 237 flow [2023-08-04 02:38:30,358 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:38:30,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 111 transitions, 237 flow [2023-08-04 02:38:30,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 111 transitions, 237 flow [2023-08-04 02:38:30,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 111 transitions, 237 flow [2023-08-04 02:38:30,407 INFO L124 PetriNetUnfolderBase]: 7/219 cut-off events. [2023-08-04 02:38:30,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:38:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 219 events. 7/219 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 568 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-04 02:38:30,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 1180 [2023-08-04 02:38:33,416 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-08-04 02:38:33,416 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-04 02:38:33,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:38:33,436 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;@33624aa4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:38:33,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:38:33,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:38:33,444 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 02:38:33,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:38:33,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:33,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:38:33,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:33,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 882325778, now seen corresponding path program 1 times [2023-08-04 02:38:33,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:33,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982144952] [2023-08-04 02:38:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:38:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982144952] [2023-08-04 02:38:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982144952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:38:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:38:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:38:33,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649292091] [2023-08-04 02:38:33,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:38:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:38:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:38:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:38:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 258 [2023-08-04 02:38:33,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:33,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:33,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 258 [2023-08-04 02:38:33,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:38:33,770 INFO L124 PetriNetUnfolderBase]: 375/735 cut-off events. [2023-08-04 02:38:33,771 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:38:33,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 735 events. 375/735 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3882 event pairs, 192 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 1430. Up to 620 conditions per place. [2023-08-04 02:38:33,778 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 22 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-04 02:38:33,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 125 flow [2023-08-04 02:38:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:38:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:38:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-04 02:38:33,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478036175710594 [2023-08-04 02:38:33,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-04 02:38:33,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-04 02:38:33,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:38:33,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-04 02:38:33,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:33,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:33,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:33,823 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 424 transitions. [2023-08-04 02:38:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 125 flow [2023-08-04 02:38:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:38:33,828 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-04 02:38:33,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-04 02:38:33,831 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 02:38:33,832 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-04 02:38:33,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:33,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:33,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:38:33,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:38:33,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:33,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash 888906739, now seen corresponding path program 1 times [2023-08-04 02:38:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131859205] [2023-08-04 02:38:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:38:33,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:38:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:38:33,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:38:33,936 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:38:33,937 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:38:33,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:38:33,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:38:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:38:33,939 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 02:38:33,940 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:38:33,943 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:38:33,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:38:33,997 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:38:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 02:38:34,326 INFO L124 PetriNetUnfolderBase]: 835/4033 cut-off events. [2023-08-04 02:38:34,326 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:38:34,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 4033 events. 835/4033 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 33052 event pairs, 33 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 02:38:34,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 02:38:34,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 133 transitions, 302 flow [2023-08-04 02:38:34,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:38:34,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 133 transitions, 302 flow [2023-08-04 02:38:34,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 133 transitions, 302 flow [2023-08-04 02:38:34,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 133 transitions, 302 flow [2023-08-04 02:38:34,386 INFO L124 PetriNetUnfolderBase]: 13/572 cut-off events. [2023-08-04 02:38:34,386 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 02:38:34,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 572 events. 13/572 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2754 event pairs, 0 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 465. Up to 27 conditions per place. [2023-08-04 02:38:34,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 3200 [2023-08-04 02:38:37,370 INFO L134 LiptonReduction]: Checked pairs total: 14764 [2023-08-04 02:38:37,371 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-04 02:38:37,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:38:37,373 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;@33624aa4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:38:37,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:38:37,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:38:37,381 INFO L124 PetriNetUnfolderBase]: 0/60 cut-off events. [2023-08-04 02:38:37,383 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 02:38:37,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:37,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:38:37,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:37,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 546746818, now seen corresponding path program 1 times [2023-08-04 02:38:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:37,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508261016] [2023-08-04 02:38:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:38:37,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:37,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508261016] [2023-08-04 02:38:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508261016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:38:37,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:38:37,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:38:37,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782800436] [2023-08-04 02:38:37,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:38:37,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:38:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:38:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:38:37,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 292 [2023-08-04 02:38:37,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:37,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:37,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 292 [2023-08-04 02:38:37,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:38:43,405 INFO L124 PetriNetUnfolderBase]: 64827/91392 cut-off events. [2023-08-04 02:38:43,406 INFO L125 PetriNetUnfolderBase]: For 6216/6216 co-relation queries the response was YES. [2023-08-04 02:38:43,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182531 conditions, 91392 events. 64827/91392 cut-off events. For 6216/6216 co-relation queries the response was YES. Maximal size of possible extension queue 3426. Compared 679049 event pairs, 50940 based on Foata normal form. 0/89944 useless extension candidates. Maximal degree in co-relation 41995. Up to 83344 conditions per place. [2023-08-04 02:38:43,979 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 02:38:43,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 212 flow [2023-08-04 02:38:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:38:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:38:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-04 02:38:43,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331050228310502 [2023-08-04 02:38:43,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-04 02:38:43,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-04 02:38:43,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:38:43,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-04 02:38:43,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:43,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:43,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:43,984 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 467 transitions. [2023-08-04 02:38:43,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 212 flow [2023-08-04 02:38:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 206 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 02:38:43,993 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-04 02:38:43,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 02:38:43,993 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 02:38:43,993 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-04 02:38:43,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:43,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:43,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:38:43,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:38:43,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:43,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2005062836, now seen corresponding path program 1 times [2023-08-04 02:38:43,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522255153] [2023-08-04 02:38:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:38:44,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522255153] [2023-08-04 02:38:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522255153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:38:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285987774] [2023-08-04 02:38:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:44,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:44,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:38:44,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:38:44,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:38:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:44,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:38:44,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:38:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:38:44,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:38:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285987774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:38:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:38:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:38:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147281121] [2023-08-04 02:38:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:38:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:38:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:44,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:38:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:38:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 292 [2023-08-04 02:38:44,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:44,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:44,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 292 [2023-08-04 02:38:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:38:49,929 INFO L124 PetriNetUnfolderBase]: 64803/91184 cut-off events. [2023-08-04 02:38:49,929 INFO L125 PetriNetUnfolderBase]: For 5324/5324 co-relation queries the response was YES. [2023-08-04 02:38:50,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181522 conditions, 91184 events. 64803/91184 cut-off events. For 5324/5324 co-relation queries the response was YES. Maximal size of possible extension queue 3425. Compared 675969 event pairs, 39840 based on Foata normal form. 16/89880 useless extension candidates. Maximal degree in co-relation 47684. Up to 83261 conditions per place. [2023-08-04 02:38:50,546 INFO L140 encePairwiseOnDemand]: 288/292 looper letters, 40 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 02:38:50,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 242 flow [2023-08-04 02:38:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:38:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:38:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-04 02:38:50,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171232876712328 [2023-08-04 02:38:50,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-04 02:38:50,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-04 02:38:50,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:38:50,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-04 02:38:50,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:50,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:50,556 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:50,556 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 755 transitions. [2023-08-04 02:38:50,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 242 flow [2023-08-04 02:38:50,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:38:50,560 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-04 02:38:50,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-04 02:38:50,560 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 02:38:50,561 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-04 02:38:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:50,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:50,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:38:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:38:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:50,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:50,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1214988146, now seen corresponding path program 1 times [2023-08-04 02:38:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:50,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597850764] [2023-08-04 02:38:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:38:50,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597850764] [2023-08-04 02:38:50,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597850764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:38:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188101214] [2023-08-04 02:38:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:50,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:38:50,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:38:50,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:38:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:50,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:38:50,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:38:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:38:50,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:38:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188101214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:38:50,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:38:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:38:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245661096] [2023-08-04 02:38:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:38:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:38:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:38:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:38:50,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 292 [2023-08-04 02:38:50,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:50,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:50,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 292 [2023-08-04 02:38:50,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:38:56,215 INFO L124 PetriNetUnfolderBase]: 62916/88829 cut-off events. [2023-08-04 02:38:56,215 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-04 02:38:56,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177123 conditions, 88829 events. 62916/88829 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 3491. Compared 659675 event pairs, 49614 based on Foata normal form. 0/87763 useless extension candidates. Maximal degree in co-relation 40792. Up to 80321 conditions per place. [2023-08-04 02:38:56,821 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 42 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-04 02:38:56,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 260 flow [2023-08-04 02:38:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:38:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:38:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-04 02:38:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5399543378995434 [2023-08-04 02:38:56,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-04 02:38:56,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-04 02:38:56,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:38:56,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-04 02:38:56,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:56,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:56,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:56,828 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 473 transitions. [2023-08-04 02:38:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 260 flow [2023-08-04 02:38:56,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 02:38:56,832 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-04 02:38:56,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-04 02:38:56,833 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 02:38:56,833 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-04 02:38:56,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:56,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:56,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:38:56,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:38:57,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:57,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:38:57,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash 210389784, now seen corresponding path program 1 times [2023-08-04 02:38:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010266593] [2023-08-04 02:38:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:38:57,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010266593] [2023-08-04 02:38:57,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010266593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:38:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405586024] [2023-08-04 02:38:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:57,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:38:57,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:38:57,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:38:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:57,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:38:57,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:38:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:38:57,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:38:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:38:57,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405586024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:38:57,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:38:57,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:38:57,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842574719] [2023-08-04 02:38:57,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:38:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:38:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:38:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:38:57,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 292 [2023-08-04 02:38:57,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:57,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:57,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 292 [2023-08-04 02:38:57,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:39:02,199 INFO L124 PetriNetUnfolderBase]: 52458/73223 cut-off events. [2023-08-04 02:39:02,200 INFO L125 PetriNetUnfolderBase]: For 4624/4624 co-relation queries the response was YES. [2023-08-04 02:39:02,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146711 conditions, 73223 events. 52458/73223 cut-off events. For 4624/4624 co-relation queries the response was YES. Maximal size of possible extension queue 3071. Compared 524847 event pairs, 31253 based on Foata normal form. 4/72699 useless extension candidates. Maximal degree in co-relation 38425. Up to 66569 conditions per place. [2023-08-04 02:39:02,692 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 41 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 02:39:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 257 flow [2023-08-04 02:39:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:39:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:39:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-04 02:39:02,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523972602739726 [2023-08-04 02:39:02,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-04 02:39:02,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-04 02:39:02,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:39:02,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-04 02:39:02,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:02,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:02,701 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:02,701 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 612 transitions. [2023-08-04 02:39:02,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 257 flow [2023-08-04 02:39:02,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:39:02,704 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-04 02:39:02,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 02:39:02,704 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 02:39:02,704 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-04 02:39:02,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:02,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:39:02,705 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:39:02,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:39:02,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:39:02,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:39:02,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:39:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1919231357, now seen corresponding path program 1 times [2023-08-04 02:39:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:39:02,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301819546] [2023-08-04 02:39:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:39:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:39:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:39:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301819546] [2023-08-04 02:39:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301819546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:39:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068191305] [2023-08-04 02:39:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:02,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:39:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:39:02,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:39:02,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:39:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:03,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:39:03,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:39:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:39:03,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:39:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068191305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:39:03,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:39:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:39:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775173814] [2023-08-04 02:39:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:39:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:39:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:39:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:39:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:39:03,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 292 [2023-08-04 02:39:03,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:39:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 292 [2023-08-04 02:39:03,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:39:07,638 INFO L124 PetriNetUnfolderBase]: 51690/71859 cut-off events. [2023-08-04 02:39:07,639 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2023-08-04 02:39:07,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144216 conditions, 71859 events. 51690/71859 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 3043. Compared 510402 event pairs, 12522 based on Foata normal form. 256/71774 useless extension candidates. Maximal degree in co-relation 37767. Up to 64016 conditions per place. [2023-08-04 02:39:08,150 INFO L140 encePairwiseOnDemand]: 288/292 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-04 02:39:08,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 333 flow [2023-08-04 02:39:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:39:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:39:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 773 transitions. [2023-08-04 02:39:08,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294520547945205 [2023-08-04 02:39:08,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 773 transitions. [2023-08-04 02:39:08,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 773 transitions. [2023-08-04 02:39:08,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:39:08,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 773 transitions. [2023-08-04 02:39:08,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:08,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:08,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:08,159 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 773 transitions. [2023-08-04 02:39:08,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 333 flow [2023-08-04 02:39:08,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:39:08,165 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-04 02:39:08,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-04 02:39:08,166 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 02:39:08,166 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-04 02:39:08,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:08,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:39:08,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:39:08,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:39:08,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:39:08,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:39:08,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:39:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash -32442623, now seen corresponding path program 1 times [2023-08-04 02:39:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:39:08,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248321196] [2023-08-04 02:39:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:39:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:39:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:39:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248321196] [2023-08-04 02:39:08,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248321196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:39:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672119618] [2023-08-04 02:39:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:08,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:39:08,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:39:08,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:39:08,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:39:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:08,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:39:08,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:39:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:39:08,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:39:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:39:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672119618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:39:08,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:39:08,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:39:08,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816966614] [2023-08-04 02:39:08,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:39:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:39:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:39:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:39:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:39:08,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 292 [2023-08-04 02:39:08,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:08,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:39:08,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 292 [2023-08-04 02:39:08,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:39:12,660 INFO L124 PetriNetUnfolderBase]: 43290/59619 cut-off events. [2023-08-04 02:39:12,660 INFO L125 PetriNetUnfolderBase]: For 4678/4678 co-relation queries the response was YES. [2023-08-04 02:39:12,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120644 conditions, 59619 events. 43290/59619 cut-off events. For 4678/4678 co-relation queries the response was YES. Maximal size of possible extension queue 2751. Compared 404048 event pairs, 26154 based on Foata normal form. 64/59406 useless extension candidates. Maximal degree in co-relation 31547. Up to 53081 conditions per place. [2023-08-04 02:39:13,025 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 53 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-04 02:39:13,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 311 flow [2023-08-04 02:39:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:39:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:39:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-04 02:39:13,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2023-08-04 02:39:13,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-04 02:39:13,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-04 02:39:13,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:39:13,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-04 02:39:13,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:13,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:13,030 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:13,030 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 624 transitions. [2023-08-04 02:39:13,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 311 flow [2023-08-04 02:39:13,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 306 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:39:13,033 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-04 02:39:13,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-04 02:39:13,033 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-04 02:39:13,033 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-04 02:39:13,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:13,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:39:13,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:39:13,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:39:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:39:13,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:39:13,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:39:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1148121590, now seen corresponding path program 1 times [2023-08-04 02:39:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:39:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31476869] [2023-08-04 02:39:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:39:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:39:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:39:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31476869] [2023-08-04 02:39:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31476869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:39:13,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:39:13,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:39:13,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653890922] [2023-08-04 02:39:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:39:13,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:39:13,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:39:13,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:39:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:39:13,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 292 [2023-08-04 02:39:13,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:13,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:39:13,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 292 [2023-08-04 02:39:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:39:15,223 INFO L124 PetriNetUnfolderBase]: 24858/34883 cut-off events. [2023-08-04 02:39:15,223 INFO L125 PetriNetUnfolderBase]: For 3814/3814 co-relation queries the response was YES. [2023-08-04 02:39:15,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72420 conditions, 34883 events. 24858/34883 cut-off events. For 3814/3814 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 228099 event pairs, 1818 based on Foata normal form. 4096/38954 useless extension candidates. Maximal degree in co-relation 28375. Up to 24320 conditions per place. [2023-08-04 02:39:15,362 INFO L140 encePairwiseOnDemand]: 290/292 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 02:39:15,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 326 flow [2023-08-04 02:39:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:39:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:39:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 02:39:15,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541095890410959 [2023-08-04 02:39:15,364 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 02:39:15,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 02:39:15,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:39:15,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 02:39:15,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:15,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:15,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:15,367 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 632 transitions. [2023-08-04 02:39:15,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 326 flow [2023-08-04 02:39:15,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:39:15,816 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 02:39:15,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 02:39:15,818 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 02:39:15,818 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 02:39:15,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:15,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:39:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:39:15,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:39:15,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:39:15,819 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:39:15,819 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:39:15,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 02:39:16,095 INFO L124 PetriNetUnfolderBase]: 835/4033 cut-off events. [2023-08-04 02:39:16,095 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:39:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 4033 events. 835/4033 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 33052 event pairs, 33 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 02:39:16,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 02:39:16,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 448 flow [2023-08-04 02:39:16,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:39:16,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 448 flow [2023-08-04 02:39:16,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 448 flow [2023-08-04 02:39:16,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 448 flow [2023-08-04 02:39:16,352 INFO L124 PetriNetUnfolderBase]: 835/3380 cut-off events. [2023-08-04 02:39:16,352 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-08-04 02:39:16,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4028 conditions, 3380 events. 835/3380 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 25301 event pairs, 33 based on Foata normal form. 0/2853 useless extension candidates. Maximal degree in co-relation 2039. Up to 192 conditions per place. [2023-08-04 02:39:16,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 6996 [2023-08-04 02:39:19,480 INFO L134 LiptonReduction]: Checked pairs total: 49657 [2023-08-04 02:39:19,480 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-04 02:39:19,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:39:19,485 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;@33624aa4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:39:19,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:39:19,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:39:19,487 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 02:39:19,487 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:39:19,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:39:19,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:39:19,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:39:19,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:39:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 96908072, now seen corresponding path program 1 times [2023-08-04 02:39:19,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:39:19,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041343294] [2023-08-04 02:39:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:39:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:39:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:39:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:39:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:39:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041343294] [2023-08-04 02:39:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041343294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:39:19,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:39:19,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:39:19,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705259089] [2023-08-04 02:39:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:39:19,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:39:19,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:39:19,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:39:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:39:19,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:39:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:39:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:39:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:39:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:40:24,973 INFO L124 PetriNetUnfolderBase]: 656063/892105 cut-off events. [2023-08-04 02:40:24,973 INFO L125 PetriNetUnfolderBase]: For 112250/112250 co-relation queries the response was YES. [2023-08-04 02:40:27,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781904 conditions, 892105 events. 656063/892105 cut-off events. For 112250/112250 co-relation queries the response was YES. Maximal size of possible extension queue 23279. Compared 7386805 event pairs, 502902 based on Foata normal form. 0/831396 useless extension candidates. Maximal degree in co-relation 502689. Up to 827362 conditions per place. [2023-08-04 02:40:30,495 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 64 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 02:40:30,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 370 flow [2023-08-04 02:40:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:40:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:40:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 02:40:30,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-04 02:40:30,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 02:40:30,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 02:40:30,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:40:30,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 02:40:30,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:40:30,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:40:30,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:40:30,518 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 228 flow. Second operand 3 states and 496 transitions. [2023-08-04 02:40:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 370 flow [2023-08-04 02:40:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:40:31,005 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 228 flow [2023-08-04 02:40:31,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-04 02:40:31,006 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-04 02:40:31,006 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 228 flow [2023-08-04 02:40:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:40:31,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:40:31,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:40:31,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 02:40:31,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:40:31,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:40:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash -476122794, now seen corresponding path program 1 times [2023-08-04 02:40:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:40:31,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054369310] [2023-08-04 02:40:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:40:31,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:40:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:40:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:40:31,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:40:31,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054369310] [2023-08-04 02:40:31,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054369310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:40:31,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847551284] [2023-08-04 02:40:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:40:31,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:40:31,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:40:31,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:40:31,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:40:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:40:31,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:40:31,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:40:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:40:31,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:40:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847551284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:40:31,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:40:31,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:40:31,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083067580] [2023-08-04 02:40:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:40:31,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:40:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:40:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:40:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:40:31,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:40:31,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:40:31,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:40:31,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:40:31,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:41:24,015 INFO L124 PetriNetUnfolderBase]: 652649/885047 cut-off events. [2023-08-04 02:41:24,015 INFO L125 PetriNetUnfolderBase]: For 73974/73974 co-relation queries the response was YES. [2023-08-04 02:41:25,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768275 conditions, 885047 events. 652649/885047 cut-off events. For 73974/73974 co-relation queries the response was YES. Maximal size of possible extension queue 23463. Compared 7254960 event pairs, 501013 based on Foata normal form. 0/826734 useless extension candidates. Maximal degree in co-relation 1768231. Up to 822432 conditions per place. [2023-08-04 02:41:29,390 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 71 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 02:41:29,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 396 flow [2023-08-04 02:41:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:41:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:41:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-04 02:41:29,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2023-08-04 02:41:29,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-04 02:41:29,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-04 02:41:29,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:41:29,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-04 02:41:29,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:41:29,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:41:29,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:41:29,394 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 228 flow. Second operand 3 states and 502 transitions. [2023-08-04 02:41:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 396 flow [2023-08-04 02:41:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:41:29,430 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 238 flow [2023-08-04 02:41:29,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-04 02:41:29,430 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 02:41:29,430 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 238 flow [2023-08-04 02:41:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:41:29,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:41:29,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:41:29,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:41:29,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:41:29,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:41:29,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:41:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1109909496, now seen corresponding path program 1 times [2023-08-04 02:41:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:41:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930078856] [2023-08-04 02:41:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:41:29,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:41:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:41:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:41:29,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:41:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930078856] [2023-08-04 02:41:29,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930078856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:41:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710845711] [2023-08-04 02:41:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:41:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:41:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:41:29,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:41:29,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:41:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:41:29,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:41:29,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:41:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:41:29,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:41:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710845711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:41:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:41:29,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:41:29,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296732767] [2023-08-04 02:41:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:41:29,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:41:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:41:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:41:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:41:29,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:41:29,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:41:29,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:41:29,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:41:29,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:42:20,444 INFO L124 PetriNetUnfolderBase]: 652249/876087 cut-off events. [2023-08-04 02:42:20,444 INFO L125 PetriNetUnfolderBase]: For 55106/55106 co-relation queries the response was YES. [2023-08-04 02:42:22,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759812 conditions, 876087 events. 652249/876087 cut-off events. For 55106/55106 co-relation queries the response was YES. Maximal size of possible extension queue 24077. Compared 7061525 event pairs, 497560 based on Foata normal form. 0/821157 useless extension candidates. Maximal degree in co-relation 515154. Up to 813434 conditions per place. [2023-08-04 02:42:26,215 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 02:42:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 432 flow [2023-08-04 02:42:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:42:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:42:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-04 02:42:26,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2023-08-04 02:42:26,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-04 02:42:26,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-04 02:42:26,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:42:26,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-04 02:42:26,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:42:26,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:42:26,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:42:26,219 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 238 flow. Second operand 3 states and 508 transitions. [2023-08-04 02:42:26,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 432 flow [2023-08-04 02:42:26,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:42:26,232 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 248 flow [2023-08-04 02:42:26,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-04 02:42:26,232 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-04 02:42:26,232 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 248 flow [2023-08-04 02:42:26,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:42:26,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:42:26,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:42:26,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 02:42:26,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:42:26,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:42:26,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:42:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash -368069993, now seen corresponding path program 1 times [2023-08-04 02:42:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:42:26,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660797720] [2023-08-04 02:42:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:42:26,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:42:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:42:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:42:26,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:42:26,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660797720] [2023-08-04 02:42:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660797720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:42:26,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911892055] [2023-08-04 02:42:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:42:26,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:42:26,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:42:26,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:42:26,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:42:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:42:26,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:42:26,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:42:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:42:26,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:42:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911892055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:42:26,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:42:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:42:26,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419121801] [2023-08-04 02:42:26,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:42:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:42:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:42:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:42:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:42:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:42:26,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:42:26,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:42:26,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:42:26,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:43:11,454 INFO L124 PetriNetUnfolderBase]: 541137/726543 cut-off events. [2023-08-04 02:43:11,454 INFO L125 PetriNetUnfolderBase]: For 46272/46272 co-relation queries the response was YES. [2023-08-04 02:43:13,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488245 conditions, 726543 events. 541137/726543 cut-off events. For 46272/46272 co-relation queries the response was YES. Maximal size of possible extension queue 18907. Compared 5728858 event pairs, 405605 based on Foata normal form. 0/691577 useless extension candidates. Maximal degree in co-relation 460306. Up to 564634 conditions per place. [2023-08-04 02:43:15,913 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 88 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 02:43:15,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 104 transitions, 495 flow [2023-08-04 02:43:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:43:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:43:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 02:43:15,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 02:43:15,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 02:43:15,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 02:43:15,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:43:15,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 02:43:15,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:43:15,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:43:15,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:43:15,919 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 248 flow. Second operand 3 states and 517 transitions. [2023-08-04 02:43:15,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 104 transitions, 495 flow [2023-08-04 02:43:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:43:15,971 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 258 flow [2023-08-04 02:43:15,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-04 02:43:15,973 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 02:43:15,973 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 258 flow [2023-08-04 02:43:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:43:15,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:43:15,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:43:15,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:43:16,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:43:16,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:43:16,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:43:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2076311750, now seen corresponding path program 1 times [2023-08-04 02:43:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:43:16,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524167550] [2023-08-04 02:43:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:43:16,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:43:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:43:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:43:16,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:43:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524167550] [2023-08-04 02:43:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524167550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:43:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055933012] [2023-08-04 02:43:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:43:16,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:43:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:43:16,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:43:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:43:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:43:16,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:43:16,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:43:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:43:16,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:43:16,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055933012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:43:16,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:43:16,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:43:16,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42813206] [2023-08-04 02:43:16,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:43:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:43:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:43:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:43:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:43:16,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:43:16,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:43:16,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:43:16,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:43:16,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:43:59,855 INFO L124 PetriNetUnfolderBase]: 485172/659750 cut-off events. [2023-08-04 02:43:59,855 INFO L125 PetriNetUnfolderBase]: For 100928/100928 co-relation queries the response was YES. [2023-08-04 02:44:01,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395899 conditions, 659750 events. 485172/659750 cut-off events. For 100928/100928 co-relation queries the response was YES. Maximal size of possible extension queue 13749. Compared 5236145 event pairs, 371318 based on Foata normal form. 0/648201 useless extension candidates. Maximal degree in co-relation 447648. Up to 498002 conditions per place. [2023-08-04 02:44:03,903 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 89 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 02:44:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 507 flow [2023-08-04 02:44:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:44:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:44:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 02:44:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 02:44:03,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 02:44:03,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 02:44:03,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:44:03,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 02:44:03,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:03,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:03,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:03,907 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 258 flow. Second operand 3 states and 517 transitions. [2023-08-04 02:44:03,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 507 flow [2023-08-04 02:44:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:44:18,358 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 268 flow [2023-08-04 02:44:18,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-04 02:44:18,358 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-04 02:44:18,358 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 268 flow [2023-08-04 02:44:18,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:18,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:44:18,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:44:18,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:44:18,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:44:18,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:44:18,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:44:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1705831170, now seen corresponding path program 1 times [2023-08-04 02:44:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:44:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17547090] [2023-08-04 02:44:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:44:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:44:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:44:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:44:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:44:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17547090] [2023-08-04 02:44:18,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17547090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:44:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793282799] [2023-08-04 02:44:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:44:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:44:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:44:18,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:44:18,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:44:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:44:18,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:44:18,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:44:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:44:18,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:44:18,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793282799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:44:18,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:44:18,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:44:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796737456] [2023-08-04 02:44:18,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:44:18,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:44:18,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:44:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:44:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:44:18,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 02:44:18,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:18,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:44:18,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 02:44:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:45:04,616 INFO L124 PetriNetUnfolderBase]: 480087/654445 cut-off events. [2023-08-04 02:45:04,616 INFO L125 PetriNetUnfolderBase]: For 99610/99610 co-relation queries the response was YES. [2023-08-04 02:45:06,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405436 conditions, 654445 events. 480087/654445 cut-off events. For 99610/99610 co-relation queries the response was YES. Maximal size of possible extension queue 13637. Compared 5201035 event pairs, 425837 based on Foata normal form. 0/652121 useless extension candidates. Maximal degree in co-relation 850818. Up to 570000 conditions per place. [2023-08-04 02:45:09,021 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 90 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 02:45:09,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 519 flow [2023-08-04 02:45:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:45:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:45:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 02:45:09,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 02:45:09,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 02:45:09,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 02:45:09,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:45:09,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 02:45:09,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:45:09,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:45:09,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:45:09,025 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 268 flow. Second operand 3 states and 517 transitions. [2023-08-04 02:45:09,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 519 flow [2023-08-04 02:49:27,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:49:27,133 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 278 flow [2023-08-04 02:49:27,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2023-08-04 02:49:27,135 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2023-08-04 02:49:27,135 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 278 flow [2023-08-04 02:49:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:49:27,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:49:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:49:27,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:49:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:49:27,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:49:27,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:49:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1476016221, now seen corresponding path program 1 times [2023-08-04 02:49:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:49:27,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572857848] [2023-08-04 02:49:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:49:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:49:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:49:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:49:27,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:49:27,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572857848] [2023-08-04 02:49:27,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572857848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:49:27,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318966835] [2023-08-04 02:49:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:49:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:49:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:49:27,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:49:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:49:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:49:27,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:49:27,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:49:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:49:27,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:49:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:49:27,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318966835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:49:27,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:49:27,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:49:27,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818256704] [2023-08-04 02:49:27,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:49:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:49:27,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:49:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:49:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:49:27,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-04 02:49:27,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:49:27,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:49:27,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-04 02:49:27,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:50:10,706 INFO L124 PetriNetUnfolderBase]: 447821/608959 cut-off events. [2023-08-04 02:50:10,706 INFO L125 PetriNetUnfolderBase]: For 84633/84633 co-relation queries the response was YES. [2023-08-04 02:50:12,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314049 conditions, 608959 events. 447821/608959 cut-off events. For 84633/84633 co-relation queries the response was YES. Maximal size of possible extension queue 13000. Compared 4791504 event pairs, 282121 based on Foata normal form. 4/608371 useless extension candidates. Maximal degree in co-relation 1161246. Up to 576548 conditions per place. [2023-08-04 02:50:14,642 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 74 selfloop transitions, 3 changer transitions 1/92 dead transitions. [2023-08-04 02:50:14,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 456 flow [2023-08-04 02:50:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:50:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:50:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 642 transitions. [2023-08-04 02:50:14,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015625 [2023-08-04 02:50:14,644 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 642 transitions. [2023-08-04 02:50:14,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 642 transitions. [2023-08-04 02:50:14,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:50:14,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 642 transitions. [2023-08-04 02:50:14,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:50:14,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:50:14,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:50:14,646 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 278 flow. Second operand 4 states and 642 transitions. [2023-08-04 02:50:14,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 456 flow Received shutdown request... [2023-08-04 02:50:20,793 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 02:50:20,793 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 02:50:21,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-08-04 02:50:21,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown