/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:01:17,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:01:17,485 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:01:17,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:01:17,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:01:17,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:01:17,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:01:17,522 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:01:17,522 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:01:17,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:01:17,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:01:17,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:01:17,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:01:17,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:01:17,528 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:01:17,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:01:17,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:01:17,529 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:01:17,529 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:01:17,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:01:17,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:01:17,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:01:17,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:01:17,530 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:01:17,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:01:17,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:01:17,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:01:17,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:01:17,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:01:17,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:01:17,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:01:17,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:01:17,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:01:17,535 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:01:17,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:01:17,535 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:01:17,535 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:01:17,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:01:17,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:01:17,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:01:17,792 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:01:17,793 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:01:17,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-03 20:01:18,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:01:19,131 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:01:19,131 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-03 20:01:19,140 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f7b5aea/02a997a5e27845c0b3c0b02d59844acb/FLAG8aa486ece [2023-08-03 20:01:19,156 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f7b5aea/02a997a5e27845c0b3c0b02d59844acb [2023-08-03 20:01:19,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:01:19,162 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:01:19,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:01:19,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:01:19,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:01:19,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f13f078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19, skipping insertion in model container [2023-08-03 20:01:19,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,199 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:01:19,373 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-min-max-1.wvr_bound2.c[3300,3313] [2023-08-03 20:01:19,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:01:19,385 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:01:19,407 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-min-max-1.wvr_bound2.c[3300,3313] [2023-08-03 20:01:19,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:01:19,417 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:01:19,417 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:01:19,423 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:01:19,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19 WrapperNode [2023-08-03 20:01:19,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:01:19,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:01:19,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:01:19,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:01:19,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,458 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 177 [2023-08-03 20:01:19,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:01:19,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:01:19,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:01:19,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:01:19,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:01:19,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:01:19,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:01:19,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:01:19,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (1/1) ... [2023-08-03 20:01:19,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:01:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:01:19,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 20:01:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 20:01:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:01:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:01:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:01:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:01:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:01:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:01:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:01:19,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:01:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:01:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:01:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:01:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:01:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:01:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:01:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:01:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:01:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:01:19,591 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:01:19,706 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:01:19,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:01:19,974 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:01:20,027 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:01:20,027 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-03 20:01:20,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:01:20 BoogieIcfgContainer [2023-08-03 20:01:20,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:01:20,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:01:20,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:01:20,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:01:20,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:01:19" (1/3) ... [2023-08-03 20:01:20,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0061ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:01:20, skipping insertion in model container [2023-08-03 20:01:20,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:01:19" (2/3) ... [2023-08-03 20:01:20,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0061ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:01:20, skipping insertion in model container [2023-08-03 20:01:20,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:01:20" (3/3) ... [2023-08-03 20:01:20,036 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-min-max-1.wvr_bound2.c [2023-08-03 20:01:20,043 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:01:20,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:01:20,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:01:20,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:01:20,161 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:01:20,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,376 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-03 20:01:20,377 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:01:20,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-03 20:01:20,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:01:20,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,424 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-03 20:01:20,518 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-03 20:01:20,519 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:01:20,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-03 20:01:20,531 INFO L119 LiptonReduction]: Number of co-enabled transitions 4842 [2023-08-03 20:01:26,503 INFO L134 LiptonReduction]: Checked pairs total: 9825 [2023-08-03 20:01:26,503 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-08-03 20:01:26,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:01:26,520 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;@51a52c3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:01:26,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:01:26,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:01:26,525 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-03 20:01:26,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:01:26,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:26,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:01:26,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:26,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1519021916, now seen corresponding path program 1 times [2023-08-03 20:01:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:26,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278385705] [2023-08-03 20:01:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:01:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:01:26,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:01:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278385705] [2023-08-03 20:01:26,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278385705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:01:26,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:01:26,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:01:26,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738737014] [2023-08-03 20:01:26,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:01:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:01:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:01:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:01:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:01:26,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-03 20:01:26,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:26,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:01:26,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-03 20:01:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:01:27,227 INFO L124 PetriNetUnfolderBase]: 1856/2970 cut-off events. [2023-08-03 20:01:27,228 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-03 20:01:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 2970 events. 1856/2970 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14549 event pairs, 1326 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 4890. Up to 2796 conditions per place. [2023-08-03 20:01:27,247 INFO L140 encePairwiseOnDemand]: 417/421 looper letters, 41 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 20:01:27,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 226 flow [2023-08-03 20:01:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:01:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:01:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-03 20:01:27,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679334916864608 [2023-08-03 20:01:27,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-03 20:01:27,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-03 20:01:27,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:01:27,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-03 20:01:27,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:27,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:27,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:27,290 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 140 flow. Second operand 3 states and 591 transitions. [2023-08-03 20:01:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 226 flow [2023-08-03 20:01:27,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:01:27,298 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 150 flow [2023-08-03 20:01:27,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-03 20:01:27,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-03 20:01:27,305 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 150 flow [2023-08-03 20:01:27,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:27,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:27,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:01:27,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:01:27,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:27,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1798611547, now seen corresponding path program 1 times [2023-08-03 20:01:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893138436] [2023-08-03 20:01:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:01:27,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:01:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:01:27,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:01:27,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:01:27,450 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:01:27,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:01:27,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:01:27,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:01:27,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:01:27,456 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:01:27,459 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:01:27,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:01:27,511 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:01:27,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:27,997 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-03 20:01:27,998 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:01:28,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-03 20:01:28,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:28,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:28,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:01:28,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:28,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:28,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-03 20:01:28,528 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-03 20:01:28,528 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:01:28,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-03 20:01:28,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 12312 [2023-08-03 20:01:34,763 INFO L134 LiptonReduction]: Checked pairs total: 33837 [2023-08-03 20:01:34,763 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-03 20:01:34,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:01:34,765 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;@51a52c3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:01:34,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:01:34,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:01:34,769 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-03 20:01:34,769 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:01:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:01:34,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:34,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1442948643, now seen corresponding path program 1 times [2023-08-03 20:01:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:34,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258362172] [2023-08-03 20:01:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:01:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:01:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:01:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258362172] [2023-08-03 20:01:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258362172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:01:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:01:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:01:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904261268] [2023-08-03 20:01:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:01:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:01:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:01:34,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:01:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:01:34,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-03 20:01:34,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:34,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:01:34,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-03 20:01:34,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:01:55,565 INFO L124 PetriNetUnfolderBase]: 262951/339948 cut-off events. [2023-08-03 20:01:55,565 INFO L125 PetriNetUnfolderBase]: For 45118/45118 co-relation queries the response was YES. [2023-08-03 20:01:56,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695400 conditions, 339948 events. 262951/339948 cut-off events. For 45118/45118 co-relation queries the response was YES. Maximal size of possible extension queue 4904. Compared 2004638 event pairs, 152324 based on Foata normal form. 0/268685 useless extension candidates. Maximal degree in co-relation 209957. Up to 325826 conditions per place. [2023-08-03 20:01:57,760 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 67 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-03 20:01:57,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 384 flow [2023-08-03 20:01:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:01:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:01:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-08-03 20:01:57,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2023-08-03 20:01:57,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-08-03 20:01:57,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-08-03 20:01:57,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:01:57,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-08-03 20:01:57,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:57,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:57,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:57,769 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 236 flow. Second operand 3 states and 680 transitions. [2023-08-03 20:01:57,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 384 flow [2023-08-03 20:01:57,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:01:57,856 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 246 flow [2023-08-03 20:01:57,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-03 20:01:57,857 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-03 20:01:57,858 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 246 flow [2023-08-03 20:01:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:57,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:01:57,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:01:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:01:57,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:01:57,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:01:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1361115582, now seen corresponding path program 1 times [2023-08-03 20:01:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:01:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547151990] [2023-08-03 20:01:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:01:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:01:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:01:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:01:57,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:01:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547151990] [2023-08-03 20:01:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547151990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:01:57,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:01:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:01:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041083611] [2023-08-03 20:01:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:01:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:01:57,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:01:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:01:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:01:57,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 470 [2023-08-03 20:01:57,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:01:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:01:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 470 [2023-08-03 20:01:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:02:18,009 INFO L124 PetriNetUnfolderBase]: 262951/339965 cut-off events. [2023-08-03 20:02:18,009 INFO L125 PetriNetUnfolderBase]: For 45069/45069 co-relation queries the response was YES. [2023-08-03 20:02:18,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695465 conditions, 339965 events. 262951/339965 cut-off events. For 45069/45069 co-relation queries the response was YES. Maximal size of possible extension queue 4884. Compared 2002195 event pairs, 191042 based on Foata normal form. 1/268708 useless extension candidates. Maximal degree in co-relation 695415. Up to 325833 conditions per place. [2023-08-03 20:02:19,980 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 63 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-03 20:02:19,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 378 flow [2023-08-03 20:02:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:02:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:02:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-03 20:02:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47375886524822697 [2023-08-03 20:02:19,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-03 20:02:19,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-03 20:02:19,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:02:19,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-03 20:02:19,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:19,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:19,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:19,987 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 246 flow. Second operand 3 states and 668 transitions. [2023-08-03 20:02:19,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 378 flow [2023-08-03 20:02:20,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:02:20,007 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 256 flow [2023-08-03 20:02:20,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-03 20:02:20,008 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-03 20:02:20,008 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 256 flow [2023-08-03 20:02:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:20,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:02:20,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:02:20,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:02:20,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:02:20,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:02:20,010 INFO L85 PathProgramCache]: Analyzing trace with hash -347078938, now seen corresponding path program 1 times [2023-08-03 20:02:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:02:20,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742386561] [2023-08-03 20:02:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:02:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:02:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:02:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:02:20,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:02:20,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742386561] [2023-08-03 20:02:20,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742386561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:02:20,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401025067] [2023-08-03 20:02:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:02:20,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:02:20,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:02:20,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:02:20,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:02:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:02:20,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:02:20,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:02:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:02:20,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:02:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401025067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:02:20,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:02:20,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:02:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326469345] [2023-08-03 20:02:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:02:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:02:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:02:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:02:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:02:20,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:02:20,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:20,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:02:20,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:02:20,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:02:39,704 INFO L124 PetriNetUnfolderBase]: 262919/339933 cut-off events. [2023-08-03 20:02:39,704 INFO L125 PetriNetUnfolderBase]: For 44962/44962 co-relation queries the response was YES. [2023-08-03 20:02:40,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695379 conditions, 339933 events. 262919/339933 cut-off events. For 44962/44962 co-relation queries the response was YES. Maximal size of possible extension queue 4884. Compared 2002473 event pairs, 115070 based on Foata normal form. 16/268699 useless extension candidates. Maximal degree in co-relation 695361. Up to 325723 conditions per place. [2023-08-03 20:02:41,634 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 75 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-03 20:02:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 438 flow [2023-08-03 20:02:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:02:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:02:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1089 transitions. [2023-08-03 20:02:41,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634042553191489 [2023-08-03 20:02:41,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1089 transitions. [2023-08-03 20:02:41,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1089 transitions. [2023-08-03 20:02:41,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:02:41,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1089 transitions. [2023-08-03 20:02:41,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.8) internal successors, (1089), 5 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:41,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:41,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:41,646 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 256 flow. Second operand 5 states and 1089 transitions. [2023-08-03 20:02:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 438 flow [2023-08-03 20:02:41,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 426 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 20:02:41,662 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 259 flow [2023-08-03 20:02:41,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-03 20:02:41,663 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-03 20:02:41,663 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 259 flow [2023-08-03 20:02:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:41,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:02:41,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:02:41,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:02:41,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:02:41,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:02:41,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:02:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1727641589, now seen corresponding path program 1 times [2023-08-03 20:02:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:02:41,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908540465] [2023-08-03 20:02:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:02:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:02:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:02:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:02:41,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:02:41,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908540465] [2023-08-03 20:02:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908540465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:02:41,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978571845] [2023-08-03 20:02:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:02:41,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:02:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:02:41,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:02:41,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:02:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:02:42,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:02:42,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:02:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:02:42,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:02:42,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978571845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:02:42,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:02:42,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:02:42,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943190595] [2023-08-03 20:02:42,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:02:42,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:02:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:02:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:02:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:02:42,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-03 20:02:42,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:02:42,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:02:42,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-03 20:02:42,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:03:03,461 INFO L124 PetriNetUnfolderBase]: 261819/339133 cut-off events. [2023-08-03 20:03:03,462 INFO L125 PetriNetUnfolderBase]: For 36558/36558 co-relation queries the response was YES. [2023-08-03 20:03:04,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690165 conditions, 339133 events. 261819/339133 cut-off events. For 36558/36558 co-relation queries the response was YES. Maximal size of possible extension queue 5029. Compared 2008511 event pairs, 151875 based on Foata normal form. 0/268123 useless extension candidates. Maximal degree in co-relation 690140. Up to 323930 conditions per place. [2023-08-03 20:03:05,591 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 77 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-03 20:03:05,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 447 flow [2023-08-03 20:03:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:03:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:03:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-03 20:03:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48723404255319147 [2023-08-03 20:03:05,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-03 20:03:05,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-03 20:03:05,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:03:05,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-03 20:03:05,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:05,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:05,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:05,599 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 259 flow. Second operand 3 states and 687 transitions. [2023-08-03 20:03:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 447 flow [2023-08-03 20:03:05,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 440 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:03:05,609 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 267 flow [2023-08-03 20:03:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-08-03 20:03:05,609 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 20:03:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 267 flow [2023-08-03 20:03:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:03:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:03:05,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 20:03:05,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 20:03:05,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:03:05,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:03:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1149222860, now seen corresponding path program 1 times [2023-08-03 20:03:05,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:03:05,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27249546] [2023-08-03 20:03:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:05,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:03:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:03:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:03:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27249546] [2023-08-03 20:03:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27249546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:03:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248669831] [2023-08-03 20:03:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:03:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:03:05,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:03:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:03:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:05,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:03:05,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:03:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 20:03:05,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:03:05,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248669831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:03:05,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:03:05,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:03:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727775938] [2023-08-03 20:03:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:03:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:03:05,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:03:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:03:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:03:05,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-03 20:03:05,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 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) [2023-08-03 20:03:05,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:03:05,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-03 20:03:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:03:25,624 INFO L124 PetriNetUnfolderBase]: 261419/339869 cut-off events. [2023-08-03 20:03:25,625 INFO L125 PetriNetUnfolderBase]: For 26283/26283 co-relation queries the response was YES. [2023-08-03 20:03:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691381 conditions, 339869 events. 261419/339869 cut-off events. For 26283/26283 co-relation queries the response was YES. Maximal size of possible extension queue 5462. Compared 2025167 event pairs, 165814 based on Foata normal form. 0/269949 useless extension candidates. Maximal degree in co-relation 691356. Up to 316526 conditions per place. [2023-08-03 20:03:27,666 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 84 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-03 20:03:27,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 477 flow [2023-08-03 20:03:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:03:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:03:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-03 20:03:27,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907801418439716 [2023-08-03 20:03:27,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-03 20:03:27,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-03 20:03:27,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:03:27,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-03 20:03:27,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:27,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:27,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:27,673 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 267 flow. Second operand 3 states and 692 transitions. [2023-08-03 20:03:27,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 477 flow [2023-08-03 20:03:27,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:03:27,687 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 276 flow [2023-08-03 20:03:27,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=276, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-03 20:03:27,687 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 20:03:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 276 flow [2023-08-03 20:03:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 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) [2023-08-03 20:03:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:03:27,688 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:03:27,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:03:27,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:03:27,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:03:27,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:03:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash -106357429, now seen corresponding path program 1 times [2023-08-03 20:03:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:03:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707514555] [2023-08-03 20:03:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:03:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:03:27,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:03:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707514555] [2023-08-03 20:03:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707514555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:03:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888834328] [2023-08-03 20:03:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:27,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:03:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:03:27,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:03:27,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:03:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:28,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:03:28,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:03:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:03:28,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:03:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:03:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888834328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:03:28,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:03:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:03:28,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721012417] [2023-08-03 20:03:28,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:03:28,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:03:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:03:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:03:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:03:28,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:03:28,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:03:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:03:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:03:47,904 INFO L124 PetriNetUnfolderBase]: 254879/330921 cut-off events. [2023-08-03 20:03:47,905 INFO L125 PetriNetUnfolderBase]: For 30592/30592 co-relation queries the response was YES. [2023-08-03 20:03:48,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677546 conditions, 330921 events. 254879/330921 cut-off events. For 30592/30592 co-relation queries the response was YES. Maximal size of possible extension queue 5465. Compared 1956587 event pairs, 112401 based on Foata normal form. 4/264839 useless extension candidates. Maximal degree in co-relation 677520. Up to 315439 conditions per place. [2023-08-03 20:03:49,859 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 77 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-03 20:03:49,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 456 flow [2023-08-03 20:03:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:03:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:03:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 886 transitions. [2023-08-03 20:03:49,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47127659574468084 [2023-08-03 20:03:49,862 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 886 transitions. [2023-08-03 20:03:49,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 886 transitions. [2023-08-03 20:03:49,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:03:49,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 886 transitions. [2023-08-03 20:03:49,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:49,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:49,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:49,867 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 276 flow. Second operand 4 states and 886 transitions. [2023-08-03 20:03:49,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 456 flow [2023-08-03 20:03:49,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:03:49,889 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 272 flow [2023-08-03 20:03:49,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-03 20:03:49,890 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 20:03:49,890 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 272 flow [2023-08-03 20:03:49,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:49,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:03:49,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:03:49,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 20:03:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:03:50,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:03:50,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:03:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1856163200, now seen corresponding path program 1 times [2023-08-03 20:03:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:03:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126056643] [2023-08-03 20:03:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:03:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:03:50,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:03:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126056643] [2023-08-03 20:03:50,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126056643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:03:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682364480] [2023-08-03 20:03:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:03:50,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:03:50,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:03:50,163 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) [2023-08-03 20:03:50,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:03:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:03:50,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:03:50,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:03:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:03:50,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:03:50,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682364480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:03:50,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:03:50,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:03:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54274913] [2023-08-03 20:03:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:03:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:03:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:03:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:03:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:03:50,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:03:50,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:03:50,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:03:50,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:03:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:04:10,357 INFO L124 PetriNetUnfolderBase]: 253855/329705 cut-off events. [2023-08-03 20:04:10,358 INFO L125 PetriNetUnfolderBase]: For 28460/28460 co-relation queries the response was YES. [2023-08-03 20:04:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674303 conditions, 329705 events. 253855/329705 cut-off events. For 28460/28460 co-relation queries the response was YES. Maximal size of possible extension queue 5465. Compared 1953281 event pairs, 39855 based on Foata normal form. 256/264067 useless extension candidates. Maximal degree in co-relation 674276. Up to 312203 conditions per place. [2023-08-03 20:04:12,313 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 101 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2023-08-03 20:04:12,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 556 flow [2023-08-03 20:04:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:04:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:04:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1113 transitions. [2023-08-03 20:04:12,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736170212765957 [2023-08-03 20:04:12,316 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1113 transitions. [2023-08-03 20:04:12,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1113 transitions. [2023-08-03 20:04:12,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:04:12,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1113 transitions. [2023-08-03 20:04:12,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:12,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:12,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:12,322 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 272 flow. Second operand 5 states and 1113 transitions. [2023-08-03 20:04:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 556 flow [2023-08-03 20:04:12,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 112 transitions, 542 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:04:12,359 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 275 flow [2023-08-03 20:04:12,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-03 20:04:12,359 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 20:04:12,360 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 275 flow [2023-08-03 20:04:12,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:12,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:04:12,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:04:12,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 20:04:12,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:12,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:04:12,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:04:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash 500045854, now seen corresponding path program 1 times [2023-08-03 20:04:12,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:04:12,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462184476] [2023-08-03 20:04:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:12,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:04:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:04:12,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:04:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462184476] [2023-08-03 20:04:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462184476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:04:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659222317] [2023-08-03 20:04:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:04:12,630 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) [2023-08-03 20:04:12,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:04:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:12,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:04:12,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:04:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:04:12,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:04:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659222317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:04:12,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:04:12,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:04:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440489851] [2023-08-03 20:04:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:04:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:04:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:04:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:04:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:04:12,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-03 20:04:12,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:12,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:04:12,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-03 20:04:12,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:04:30,014 INFO L124 PetriNetUnfolderBase]: 219055/285817 cut-off events. [2023-08-03 20:04:30,014 INFO L125 PetriNetUnfolderBase]: For 24875/24875 co-relation queries the response was YES. [2023-08-03 20:04:30,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584988 conditions, 285817 events. 219055/285817 cut-off events. For 24875/24875 co-relation queries the response was YES. Maximal size of possible extension queue 4712. Compared 1685302 event pairs, 134942 based on Foata normal form. 0/229235 useless extension candidates. Maximal degree in co-relation 584961. Up to 235210 conditions per place. [2023-08-03 20:04:31,751 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 92 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-03 20:04:31,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 529 flow [2023-08-03 20:04:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:04:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:04:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-03 20:04:31,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957446808510638 [2023-08-03 20:04:31,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-03 20:04:31,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-03 20:04:31,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:04:31,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-03 20:04:31,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:31,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:31,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:31,758 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 275 flow. Second operand 3 states and 699 transitions. [2023-08-03 20:04:31,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 529 flow [2023-08-03 20:04:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 522 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:04:31,773 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 280 flow [2023-08-03 20:04:31,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=280, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-03 20:04:31,774 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-08-03 20:04:31,774 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 280 flow [2023-08-03 20:04:31,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:31,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:04:31,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:04:31,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:04:31,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:31,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:04:31,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:04:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 94354964, now seen corresponding path program 1 times [2023-08-03 20:04:31,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:04:31,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389007361] [2023-08-03 20:04:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:31,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:04:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:04:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:04:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389007361] [2023-08-03 20:04:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389007361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:04:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262869286] [2023-08-03 20:04:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:32,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:04:32,052 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) [2023-08-03 20:04:32,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:04:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:32,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:04:32,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:04:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:04:32,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:04:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:04:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262869286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:04:32,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:04:32,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:04:32,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185895581] [2023-08-03 20:04:32,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:04:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:04:32,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:04:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:04:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:04:32,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:04:32,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:32,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:04:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:04:32,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:04:49,301 INFO L124 PetriNetUnfolderBase]: 209439/272937 cut-off events. [2023-08-03 20:04:49,301 INFO L125 PetriNetUnfolderBase]: For 32280/32280 co-relation queries the response was YES. [2023-08-03 20:04:50,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571711 conditions, 272937 events. 209439/272937 cut-off events. For 32280/32280 co-relation queries the response was YES. Maximal size of possible extension queue 4812. Compared 1590422 event pairs, 93568 based on Foata normal form. 64/222844 useless extension candidates. Maximal degree in co-relation 571683. Up to 259194 conditions per place. [2023-08-03 20:04:50,966 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 94 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-08-03 20:04:50,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 526 flow [2023-08-03 20:04:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:04:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:04:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2023-08-03 20:04:50,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797872340425532 [2023-08-03 20:04:50,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2023-08-03 20:04:50,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2023-08-03 20:04:50,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:04:50,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2023-08-03 20:04:50,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:50,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:50,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:50,974 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 280 flow. Second operand 4 states and 902 transitions. [2023-08-03 20:04:50,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 526 flow [2023-08-03 20:04:51,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:04:51,477 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 276 flow [2023-08-03 20:04:51,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-03 20:04:51,478 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2023-08-03 20:04:51,478 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 276 flow [2023-08-03 20:04:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:51,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:04:51,478 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:04:51,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 20:04:51,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:51,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:04:51,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:04:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1512202318, now seen corresponding path program 1 times [2023-08-03 20:04:51,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:04:51,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702848961] [2023-08-03 20:04:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:51,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:04:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:04:51,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:04:51,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702848961] [2023-08-03 20:04:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702848961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:04:51,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960527693] [2023-08-03 20:04:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:04:51,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:04:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:04:51,749 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) [2023-08-03 20:04:51,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:04:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:04:51,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:04:51,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:04:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:04:51,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:04:51,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960527693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:04:51,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:04:51,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:04:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324893782] [2023-08-03 20:04:51,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:04:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:04:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:04:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:04:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:04:51,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:04:51,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:04:51,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:04:51,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:04:51,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:05:07,496 INFO L124 PetriNetUnfolderBase]: 204319/266281 cut-off events. [2023-08-03 20:05:07,496 INFO L125 PetriNetUnfolderBase]: For 26292/26292 co-relation queries the response was YES. [2023-08-03 20:05:08,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555407 conditions, 266281 events. 204319/266281 cut-off events. For 26292/26292 co-relation queries the response was YES. Maximal size of possible extension queue 4812. Compared 1547533 event pairs, 4872 based on Foata normal form. 1024/218172 useless extension candidates. Maximal degree in co-relation 555379. Up to 235275 conditions per place. [2023-08-03 20:05:09,104 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 117 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2023-08-03 20:05:09,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 622 flow [2023-08-03 20:05:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:05:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:05:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2023-08-03 20:05:09,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-03 20:05:09,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2023-08-03 20:05:09,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2023-08-03 20:05:09,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:05:09,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2023-08-03 20:05:09,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:09,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:09,114 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:09,114 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 276 flow. Second operand 5 states and 1128 transitions. [2023-08-03 20:05:09,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 622 flow [2023-08-03 20:05:09,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 127 transitions, 608 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:05:09,721 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 279 flow [2023-08-03 20:05:09,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-03 20:05:09,722 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2023-08-03 20:05:09,722 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 279 flow [2023-08-03 20:05:09,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:09,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:05:09,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:05:09,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 20:05:09,928 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,SelfDestructingSolverStorable11 [2023-08-03 20:05:09,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:05:09,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:05:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash -412483510, now seen corresponding path program 1 times [2023-08-03 20:05:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:05:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840489771] [2023-08-03 20:05:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:05:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:05:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:05:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:05:09,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:05:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840489771] [2023-08-03 20:05:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840489771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:05:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640908162] [2023-08-03 20:05:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:05:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:05:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:05:09,990 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) [2023-08-03 20:05:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:05:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:05:10,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:05:10,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:05:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:05:10,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:05:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640908162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:05:10,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:05:10,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:05:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115286139] [2023-08-03 20:05:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:05:10,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:05:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:05:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:05:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:05:10,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-03 20:05:10,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:10,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:05:10,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-03 20:05:10,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:05:25,685 INFO L124 PetriNetUnfolderBase]: 187458/246832 cut-off events. [2023-08-03 20:05:25,685 INFO L125 PetriNetUnfolderBase]: For 34976/34976 co-relation queries the response was YES. [2023-08-03 20:05:26,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517241 conditions, 246832 events. 187458/246832 cut-off events. For 34976/34976 co-relation queries the response was YES. Maximal size of possible extension queue 3671. Compared 1456394 event pairs, 107228 based on Foata normal form. 0/204551 useless extension candidates. Maximal degree in co-relation 517212. Up to 179690 conditions per place. [2023-08-03 20:05:27,422 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 93 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-03 20:05:27,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 533 flow [2023-08-03 20:05:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:05:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:05:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-03 20:05:27,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957446808510638 [2023-08-03 20:05:27,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-03 20:05:27,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-03 20:05:27,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:05:27,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-03 20:05:27,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:27,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:27,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:27,428 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 279 flow. Second operand 3 states and 699 transitions. [2023-08-03 20:05:27,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 533 flow [2023-08-03 20:05:27,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 526 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:05:27,720 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 284 flow [2023-08-03 20:05:27,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=284, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-08-03 20:05:27,721 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-03 20:05:27,721 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 284 flow [2023-08-03 20:05:27,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:27,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:05:27,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:05:27,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:05:27,922 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,SelfDestructingSolverStorable12 [2023-08-03 20:05:27,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:05:27,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:05:27,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1230275344, now seen corresponding path program 1 times [2023-08-03 20:05:27,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:05:27,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566538283] [2023-08-03 20:05:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:05:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:05:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:05:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:05:27,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:05:27,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566538283] [2023-08-03 20:05:27,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566538283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:05:27,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:05:27,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:05:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622407300] [2023-08-03 20:05:27,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:05:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:05:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:05:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:05:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:05:28,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:05:28,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:28,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:05:28,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:05:28,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:05:47,153 INFO L124 PetriNetUnfolderBase]: 224338/292963 cut-off events. [2023-08-03 20:05:47,153 INFO L125 PetriNetUnfolderBase]: For 54871/54871 co-relation queries the response was YES. [2023-08-03 20:05:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629350 conditions, 292963 events. 224338/292963 cut-off events. For 54871/54871 co-relation queries the response was YES. Maximal size of possible extension queue 4235. Compared 1737207 event pairs, 140667 based on Foata normal form. 0/247587 useless extension candidates. Maximal degree in co-relation 629320. Up to 236279 conditions per place. [2023-08-03 20:05:49,297 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 126 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2023-08-03 20:05:49,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 135 transitions, 772 flow [2023-08-03 20:05:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:05:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:05:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 925 transitions. [2023-08-03 20:05:49,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920212765957447 [2023-08-03 20:05:49,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 925 transitions. [2023-08-03 20:05:49,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 925 transitions. [2023-08-03 20:05:49,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:05:49,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 925 transitions. [2023-08-03 20:05:49,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.25) internal successors, (925), 4 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:49,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:49,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:05:49,304 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 284 flow. Second operand 4 states and 925 transitions. [2023-08-03 20:05:49,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 135 transitions, 772 flow [2023-08-03 20:06:00,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 768 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:06:00,266 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 296 flow [2023-08-03 20:06:00,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2023-08-03 20:06:00,267 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-03 20:06:00,267 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 296 flow [2023-08-03 20:06:00,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:06:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:06:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:06:00,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:06:00,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:06:00,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:06:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash 208742530, now seen corresponding path program 1 times [2023-08-03 20:06:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:06:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404158843] [2023-08-03 20:06:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:06:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:06:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:06:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:06:00,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:06:00,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404158843] [2023-08-03 20:06:00,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404158843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:06:00,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:06:00,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:06:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723902695] [2023-08-03 20:06:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:06:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:06:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:06:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:06:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:06:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-03 20:06:00,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:06:00,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:06:00,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-03 20:06:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand